diff --git a/beacon_chain/beacon_chain_db_immutable.nim b/beacon_chain/beacon_chain_db_immutable.nim
index 6b6736919..f59a55e52 100644
--- a/beacon_chain/beacon_chain_db_immutable.nim
+++ b/beacon_chain/beacon_chain_db_immutable.nim
@@ -15,7 +15,7 @@ import
   ./spec/[eth2_ssz_serialization, eth2_merkleization]
 
 type
-  # https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#beaconstate
+  # https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#beaconstate
   # Memory-representation-equivalent to a phase0 BeaconState for in-place SSZ reading and writing
   Phase0BeaconStateNoImmutableValidators* = object
     # Versioning
@@ -66,7 +66,7 @@ type
     current_justified_checkpoint*: Checkpoint
     finalized_checkpoint*: Checkpoint
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/altair/beacon-chain.md#beaconstate
+  # https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/altair/beacon-chain.md#beaconstate
   # Memory-representation-equivalent to an Altair BeaconState for in-place SSZ
   # reading and writing
   AltairBeaconStateNoImmutableValidators* = object
diff --git a/beacon_chain/consensus_object_pools/blockchain_dag.nim b/beacon_chain/consensus_object_pools/blockchain_dag.nim
index 6b043a744..abf6a47f0 100644
--- a/beacon_chain/consensus_object_pools/blockchain_dag.nim
+++ b/beacon_chain/consensus_object_pools/blockchain_dag.nim
@@ -1600,7 +1600,7 @@ proc aggregateAll*(
     # Aggregation spec requires non-empty collection
     # - https://tools.ietf.org/html/draft-irtf-cfrg-bls-signature-04
     # Eth2 spec requires at least one attesting index in attestation
-    # - https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#is_valid_indexed_attestation
+    # - https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#is_valid_indexed_attestation
     return err("aggregate: no attesting keys")
 
   let
diff --git a/beacon_chain/consensus_object_pools/spec_cache.nim b/beacon_chain/consensus_object_pools/spec_cache.nim
index f7e7ed011..0bfcf8e98 100644
--- a/beacon_chain/consensus_object_pools/spec_cache.nim
+++ b/beacon_chain/consensus_object_pools/spec_cache.nim
@@ -23,7 +23,7 @@ export
 func count_active_validators*(epochInfo: EpochRef): uint64 =
   epochInfo.shuffled_active_validator_indices.lenu64
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#get_committee_count_per_slot
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#get_committee_count_per_slot
 func get_committee_count_per_slot*(epochInfo: EpochRef): uint64 =
   get_committee_count_per_slot(count_active_validators(epochInfo))
 
@@ -36,7 +36,7 @@ func get_committee_index*(epochRef: EpochRef, index: uint64):
     Result[CommitteeIndex, cstring] =
   check_attestation_index(index, get_committee_count_per_slot(epochRef))
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#get_beacon_committee
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#get_beacon_committee
 iterator get_beacon_committee*(
     epochRef: EpochRef, slot: Slot, committee_index: CommitteeIndex):
     (int, ValidatorIndex) =
@@ -49,7 +49,7 @@ iterator get_beacon_committee*(
     committees_per_slot * SLOTS_PER_EPOCH
   ): yield (index_in_committee, idx)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#get_beacon_committee
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#get_beacon_committee
 func get_beacon_committee*(
     epochRef: EpochRef, slot: Slot, committee_index: CommitteeIndex):
     seq[ValidatorIndex] =
@@ -62,7 +62,7 @@ func get_beacon_committee*(
     committees_per_slot * SLOTS_PER_EPOCH
   )
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#get_beacon_committee
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#get_beacon_committee
 func get_beacon_committee_len*(
     epochRef: EpochRef, slot: Slot, committee_index: CommitteeIndex): uint64 =
   ## Return the number of members in the beacon committee at ``slot`` for ``index``.
@@ -75,7 +75,7 @@ func get_beacon_committee_len*(
     committees_per_slot * SLOTS_PER_EPOCH
   )
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#get_attesting_indices
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#get_attesting_indices
 iterator get_attesting_indices*(epochRef: EpochRef,
                                 slot: Slot,
                                 committee_index: CommitteeIndex,
@@ -103,7 +103,7 @@ func get_attesting_indices_one*(epochRef: EpochRef,
     res = some(validator_index)
   res
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#get_attesting_indices
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#get_attesting_indices
 func get_attesting_indices*(epochRef: EpochRef,
                             slot: Slot,
                             committee_index: CommitteeIndex,
@@ -113,7 +113,7 @@ func get_attesting_indices*(epochRef: EpochRef,
   for idx in get_attesting_indices(epochRef, slot, committee_index, bits):
     result.add(idx)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#is_valid_indexed_attestation
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#is_valid_indexed_attestation
 proc is_valid_indexed_attestation*(
     fork: Fork, genesis_validators_root: Eth2Digest,
     epochRef: EpochRef,
diff --git a/beacon_chain/consensus_object_pools/sync_committee_msg_pool.nim b/beacon_chain/consensus_object_pools/sync_committee_msg_pool.nim
index 180ba838c..9726c465e 100644
--- a/beacon_chain/consensus_object_pools/sync_committee_msg_pool.nim
+++ b/beacon_chain/consensus_object_pools/sync_committee_msg_pool.nim
@@ -280,7 +280,7 @@ proc produceSyncAggregate*(
 
 proc isEpochLeadTime*(
     pool: SyncCommitteeMsgPool, epochsToSyncPeriod: uint64): bool =
-  # https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/altair/validator.md#sync-committee-subnet-stability
+  # https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/altair/validator.md#sync-committee-subnet-stability
   # This ensures a uniform distribution without requiring additional state:
   # (1/4)                         = 1/4, 4 slots out
   # (3/4) * (1/3)                 = 1/4, 3 slots out
diff --git a/beacon_chain/fork_choice/fork_choice.nim b/beacon_chain/fork_choice/fork_choice.nim
index c39f145d0..560cd354e 100644
--- a/beacon_chain/fork_choice/fork_choice.nim
+++ b/beacon_chain/fork_choice/fork_choice.nim
@@ -1,5 +1,5 @@
 # beacon_chain
-# Copyright (c) 2018-2021 Status Research & Development GmbH
+# Copyright (c) 2018-2022 Status Research & Development GmbH
 # Licensed and distributed under either of
 #   * MIT license (license terms in the root directory or at https://opensource.org/licenses/MIT).
 #   * Apache v2 license (license terms in the root directory or at https://www.apache.org/licenses/LICENSE-2.0).
@@ -221,11 +221,18 @@ proc on_attestation*(
       block_root: beacon_block_root))
   ok()
 
-# https://github.com/ethereum/consensus-specs/blob/v0.12.1/specs/phase0/fork-choice.md#should_update_justified_checkpoint
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/fork-choice.md#should_update_justified_checkpoint
 func should_update_justified_checkpoint(
         self: var Checkpoints,
         dag: ChainDAGRef,
         epochRef: EpochRef): FcResult[bool] =
+  # To address the bouncing attack, only update conflicting justified
+  # checkpoints in the fork choice if in the early slots of the epoch.
+  # Otherwise, delay incorporation of new justified checkpoint until next epoch
+  # boundary.
+  #
+  # See https://ethresear.ch/t/prevention-of-bouncing-attack-on-ffg/6114 for
+  # more detailed analysis and discussion.
   if self.time.slotOrZero.since_epoch_start() < SAFE_SLOTS_TO_UPDATE_JUSTIFIED:
     return ok(true)
 
diff --git a/beacon_chain/networking/eth2_network.nim b/beacon_chain/networking/eth2_network.nim
index b3e32a3c3..f7e4b48e4 100644
--- a/beacon_chain/networking/eth2_network.nim
+++ b/beacon_chain/networking/eth2_network.nim
@@ -2119,7 +2119,7 @@ proc updateStabilitySubnetMetadata*(node: Eth2Node, attnets: AttnetBits) =
     debug "Stability subnets changed; updated ENR attnets", attnets
 
 proc updateSyncnetsMetadata*(node: Eth2Node, syncnets: SyncnetBits) =
-  # https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/altair/validator.md#sync-committee-subnet-stability
+  # https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/altair/validator.md#sync-committee-subnet-stability
   if node.metadata.syncnets == syncnets:
     return
 
diff --git a/beacon_chain/nimbus_beacon_node.nim b/beacon_chain/nimbus_beacon_node.nim
index 369b13211..221257947 100644
--- a/beacon_chain/nimbus_beacon_node.nim
+++ b/beacon_chain/nimbus_beacon_node.nim
@@ -834,7 +834,7 @@ proc trackNextSyncCommitteeTopics(node: BeaconNode, slot: Slot) =
 
   var newSubcommittees: SyncnetBits
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/altair/validator.md#sync-committee-subnet-stability
+  # https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/altair/validator.md#sync-committee-subnet-stability
   for subcommitteeIdx in SyncSubcommitteeIndex:
     if  (not node.network.metadata.syncnets[subcommitteeIdx]) and
         nextSyncCommitteeSubnets[subcommitteeIdx] and
diff --git a/beacon_chain/rpc/rest_config_api.nim b/beacon_chain/rpc/rest_config_api.nim
index 846e6eb7f..8edf42001 100644
--- a/beacon_chain/rpc/rest_config_api.nim
+++ b/beacon_chain/rpc/rest_config_api.nim
@@ -1,4 +1,4 @@
-# Copyright (c) 2018-2021 Status Research & Development GmbH
+# Copyright (c) 2018-2022 Status Research & Development GmbH
 # Licensed and distributed under either of
 #   * MIT license (license terms in the root directory or at https://opensource.org/licenses/MIT).
 #   * Apache v2 license (license terms in the root directory or at https://www.apache.org/licenses/LICENSE-2.0).
@@ -160,7 +160,7 @@ proc installConfigApiHandlers*(router: var RestRouter, node: BeaconNode) =
           DEPOSIT_CONTRACT_ADDRESS:
             $node.dag.cfg.DEPOSIT_CONTRACT_ADDRESS,
 
-          # https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#constants
+          # https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#constants
           # GENESIS_SLOT
           # GENESIS_EPOCH
           # FAR_FUTURE_EPOCH
@@ -187,7 +187,7 @@ proc installConfigApiHandlers*(router: var RestRouter, node: BeaconNode) =
           DOMAIN_AGGREGATE_AND_PROOF:
             to0xHex(DOMAIN_AGGREGATE_AND_PROOF.data),
 
-          # https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/altair/beacon-chain.md#constants
+          # https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/altair/beacon-chain.md#constants
           TIMELY_SOURCE_FLAG_INDEX:
             to0xHex([byte(TIMELY_SOURCE_FLAG_INDEX)]),
           TIMELY_TARGET_FLAG_INDEX:
@@ -224,7 +224,7 @@ proc installConfigApiHandlers*(router: var RestRouter, node: BeaconNode) =
           ATTESTATION_SUBNET_COUNT:
             Base10.toString(uint64(ATTESTATION_SUBNET_COUNT)),
 
-          # https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/altair/validator.md#constants
+          # https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/altair/validator.md#constants
           TARGET_AGGREGATORS_PER_SYNC_SUBCOMMITTEE:
             Base10.toString(uint64(TARGET_AGGREGATORS_PER_SYNC_SUBCOMMITTEE)),
           SYNC_COMMITTEE_SUBNET_COUNT:
diff --git a/beacon_chain/spec/beacon_time.nim b/beacon_chain/spec/beacon_time.nim
index 93e8ab4e4..20c7e078a 100644
--- a/beacon_chain/spec/beacon_time.nim
+++ b/beacon_chain/spec/beacon_time.nim
@@ -1,5 +1,5 @@
 # beacon_chain
-# Copyright (c) 2018-2021 Status Research & Development GmbH
+# Copyright (c) 2018-2022 Status Research & Development GmbH
 # Licensed and distributed under either of
 #   * MIT license (license terms in the root directory or at https://opensource.org/licenses/MIT).
 #   * Apache v2 license (license terms in the root directory or at https://www.apache.org/licenses/LICENSE-2.0).
@@ -140,10 +140,10 @@ const
   # https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/validator.md#broadcast-aggregate
   aggregateSlotOffset* = TimeDiff(nanoseconds:
     NANOSECONDS_PER_SLOT.int64  * 2 div INTERVALS_PER_SLOT)
-  # https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/altair/validator.md#prepare-sync-committee-message
+  # https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/altair/validator.md#prepare-sync-committee-message
   syncCommitteeMessageSlotOffset* = TimeDiff(nanoseconds:
     NANOSECONDS_PER_SLOT.int64  div INTERVALS_PER_SLOT)
-  # https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/altair/validator.md#broadcast-sync-committee-contribution
+  # https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/altair/validator.md#broadcast-sync-committee-contribution
   syncContributionSlotOffset* = TimeDiff(nanoseconds:
     NANOSECONDS_PER_SLOT.int64  * 2 div INTERVALS_PER_SLOT)
 
@@ -173,7 +173,7 @@ func slotOrZero*(time: BeaconTime): Slot =
   if exSlot.afterGenesis: exSlot.slot
   else: Slot(0)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#compute_epoch_at_slot
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#compute_epoch_at_slot
 func epoch*(slot: Slot): Epoch = # aka compute_epoch_at_slot
   ## Return the epoch number at ``slot``.
   if slot == FAR_FUTURE_SLOT: FAR_FUTURE_EPOCH
@@ -187,14 +187,14 @@ func since_epoch_start*(slot: Slot): uint64 = # aka compute_slots_since_epoch_st
 template is_epoch*(slot: Slot): bool =
   slot.since_epoch_start == 0
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#compute_start_slot_at_epoch
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#compute_start_slot_at_epoch
 func start_slot*(epoch: Epoch): Slot = # aka compute_start_slot_at_epoch
   ## Return the start slot of ``epoch``.
   const maxEpoch = Epoch(FAR_FUTURE_SLOT div SLOTS_PER_EPOCH)
   if epoch >= maxEpoch: FAR_FUTURE_SLOT
   else: Slot(epoch * SLOTS_PER_EPOCH)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#get_previous_epoch
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#get_previous_epoch
 func get_previous_epoch*(current_epoch: Epoch): Epoch =
   ## Return the previous epoch (unless the current epoch is ``GENESIS_EPOCH``).
   if current_epoch == GENESIS_EPOCH:
@@ -207,7 +207,7 @@ iterator slots*(epoch: Epoch): Slot =
   for slot in start_slot ..< start_slot + SLOTS_PER_EPOCH:
     yield slot
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/altair/validator.md#sync-committee
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/altair/validator.md#sync-committee
 template sync_committee_period*(epoch: Epoch): SyncCommitteePeriod =
   if epoch == FAR_FUTURE_EPOCH: FAR_FUTURE_PERIOD
   else: SyncCommitteePeriod(epoch div EPOCHS_PER_SYNC_COMMITTEE_PERIOD)
diff --git a/beacon_chain/spec/beaconstate.nim b/beacon_chain/spec/beaconstate.nim
index 8fc2d9219..610e90602 100644
--- a/beacon_chain/spec/beaconstate.nim
+++ b/beacon_chain/spec/beaconstate.nim
@@ -18,7 +18,7 @@ import
 
 export extras, forks, validator
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#increase_balance
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#increase_balance
 func increase_balance*(balance: var Gwei, delta: Gwei) =
   balance += delta
 
@@ -28,7 +28,7 @@ func increase_balance*(
   if delta != 0: # avoid dirtying the balance cache if not needed
     increase_balance(state.balances[index], delta)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#decrease_balance
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#decrease_balance
 func decrease_balance*(balance: var Gwei, delta: Gwei) =
   balance =
     if delta > balance:
@@ -43,8 +43,8 @@ func decrease_balance*(
   if delta != 0: # avoid dirtying the balance cache if not needed
     decrease_balance(state.balances[index], delta)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#deposits
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/altair/beacon-chain.md#modified-process_deposit
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#deposits
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/altair/beacon-chain.md#modified-process_deposit
 func get_validator_from_deposit*(deposit: DepositData):
     Validator =
   let
@@ -62,13 +62,13 @@ func get_validator_from_deposit*(deposit: DepositData):
     effective_balance: effective_balance
   )
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#compute_activation_exit_epoch
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#compute_activation_exit_epoch
 func compute_activation_exit_epoch*(epoch: Epoch): Epoch =
   ## Return the epoch during which validator activations and exits initiated in
   ## ``epoch`` take effect.
   epoch + 1 + MAX_SEED_LOOKAHEAD
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#get_validator_churn_limit
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#get_validator_churn_limit
 func get_validator_churn_limit*(
       cfg: RuntimeConfig, state: ForkyBeaconState, cache: var StateCache):
     uint64 =
@@ -78,7 +78,7 @@ func get_validator_churn_limit*(
     count_active_validators(
       state, state.get_current_epoch(), cache) div cfg.CHURN_LIMIT_QUOTIENT)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#initiate_validator_exit
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#initiate_validator_exit
 func initiate_validator_exit*(cfg: RuntimeConfig, state: var ForkyBeaconState,
                               index: ValidatorIndex, cache: var StateCache) =
   ## Initiate the exit of the validator with index ``index``.
@@ -119,8 +119,8 @@ func initiate_validator_exit*(cfg: RuntimeConfig, state: var ForkyBeaconState,
   validator.withdrawable_epoch =
     validator.exit_epoch + cfg.MIN_VALIDATOR_WITHDRAWABILITY_DELAY
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#slash_validator
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/altair/beacon-chain.md#modified-slash_validator
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#slash_validator
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/altair/beacon-chain.md#modified-slash_validator
 # https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/bellatrix/beacon-chain.md#modified-slash_validator
 proc get_slashing_penalty*(state: ForkyBeaconState,
                            validator_effective_balance: Gwei): Gwei =
@@ -203,7 +203,7 @@ proc slash_validator*(
 func genesis_time_from_eth1_timestamp*(cfg: RuntimeConfig, eth1_timestamp: uint64): uint64 =
   eth1_timestamp + cfg.GENESIS_DELAY
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#genesis
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#genesis
 proc initialize_beacon_state_from_eth1*(
     cfg: RuntimeConfig,
     eth1_block_hash: Eth2Digest,
@@ -305,7 +305,7 @@ proc initialize_hashed_beacon_state_from_eth1*(
       cfg, eth1_block_hash, eth1_timestamp, deposits, flags))
   result.root = hash_tree_root(result.data)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#genesis-block
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#genesis-block
 func get_initial_beacon_block*(state: phase0.HashedBeaconState):
     phase0.TrustedSignedBeaconBlock =
   # The genesis block is implicitly trusted
@@ -317,7 +317,7 @@ func get_initial_beacon_block*(state: phase0.HashedBeaconState):
   phase0.TrustedSignedBeaconBlock(
     message: message, root: hash_tree_root(message))
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/altair/beacon-chain.md#initialize-state-for-pure-altair-testnets-and-test-vectors
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/altair/beacon-chain.md#initialize-state-for-pure-altair-testnets-and-test-vectors
 func get_initial_beacon_block*(state: altair.HashedBeaconState):
     altair.TrustedSignedBeaconBlock =
   # The genesis block is implicitly trusted
@@ -346,7 +346,7 @@ func get_initial_beacon_block*(state: ForkedHashedBeaconState):
   withState(state):
     ForkedTrustedSignedBeaconBlock.init(get_initial_beacon_block(state))
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#get_block_root_at_slot
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#get_block_root_at_slot
 func get_block_root_at_slot*(state: ForkyBeaconState, slot: Slot): Eth2Digest =
   ## Return the block root at a recent ``slot``.
 
@@ -364,12 +364,12 @@ func get_block_root_at_slot*(state: ForkedHashedBeaconState,
   withState(state):
     get_block_root_at_slot(state.data, slot)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#get_block_root
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#get_block_root
 func get_block_root*(state: ForkyBeaconState, epoch: Epoch): Eth2Digest =
   ## Return the block root at the start of a recent ``epoch``.
   get_block_root_at_slot(state, epoch.start_slot())
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#get_total_balance
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#get_total_balance
 template get_total_balance(
     state: ForkyBeaconState, validator_indices: untyped): Gwei =
   ## Return the combined effective balance of the ``indices``.
@@ -380,13 +380,13 @@ template get_total_balance(
     res += state.validators.asSeq()[validator_index].effective_balance
   max(EFFECTIVE_BALANCE_INCREMENT, res)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#is_eligible_for_activation_queue
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#is_eligible_for_activation_queue
 func is_eligible_for_activation_queue*(validator: Validator): bool =
   ## Check if ``validator`` is eligible to be placed into the activation queue.
   validator.activation_eligibility_epoch == FAR_FUTURE_EPOCH and
     validator.effective_balance == MAX_EFFECTIVE_BALANCE
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#is_eligible_for_activation
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#is_eligible_for_activation
 func is_eligible_for_activation*(state: ForkyBeaconState, validator: Validator):
     bool =
   ## Check if ``validator`` is eligible for activation.
@@ -396,7 +396,7 @@ func is_eligible_for_activation*(state: ForkyBeaconState, validator: Validator):
   # Has not yet been activated
     validator.activation_epoch == FAR_FUTURE_EPOCH
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#is_valid_indexed_attestation
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#is_valid_indexed_attestation
 proc is_valid_indexed_attestation*(
     state: ForkyBeaconState, indexed_attestation: SomeIndexedAttestation,
     flags: UpdateFlags): Result[void, cstring] =
@@ -434,7 +434,7 @@ proc is_valid_indexed_attestation*(
 
   ok()
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#get_attesting_indices
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#get_attesting_indices
 func get_attesting_indices*(state: ForkyBeaconState,
                             data: AttestationData,
                             bits: CommitteeValidatorsBits,
@@ -499,7 +499,7 @@ proc is_valid_indexed_attestation*(
 
 # Attestation validation
 # ------------------------------------------------------------------------------------------
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#attestations
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#attestations
 # https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/p2p-interface.md#beacon_attestation_subnet_id
 
 func check_attestation_slot_target*(data: AttestationData): Result[Slot, cstring] =
@@ -542,7 +542,7 @@ func check_attestation_index*(
     Result[CommitteeIndex, cstring] =
   check_attestation_index(data.index, committees_per_slot)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/altair/beacon-chain.md#get_attestation_participation_flag_indices
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/altair/beacon-chain.md#get_attestation_participation_flag_indices
 func get_attestation_participation_flag_indices(state: altair.BeaconState | bellatrix.BeaconState,
                                                 data: AttestationData,
                                                 inclusion_delay: uint64): seq[int] =
@@ -576,7 +576,7 @@ func get_attestation_participation_flag_indices(state: altair.BeaconState | bell
 # TODO these duplicate some stuff in state_transition_epoch which uses TotalBalances
 # better to centralize around that if feasible
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#get_total_active_balance
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#get_total_active_balance
 func get_total_active_balance*(state: ForkyBeaconState, cache: var StateCache): Gwei =
   ## Return the combined effective balance of the active validators.
   # Note: ``get_total_balance`` returns ``EFFECTIVE_BALANCE_INCREMENT`` Gwei
@@ -587,7 +587,7 @@ func get_total_active_balance*(state: ForkyBeaconState, cache: var StateCache):
   get_total_balance(
     state, cache.get_shuffled_active_validator_indices(state, epoch))
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/altair/beacon-chain.md#get_base_reward_per_increment
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/altair/beacon-chain.md#get_base_reward_per_increment
 func get_base_reward_per_increment_sqrt*(
     total_active_balance_sqrt: uint64): Gwei =
   EFFECTIVE_BALANCE_INCREMENT * BASE_REWARD_FACTOR div total_active_balance_sqrt
@@ -596,7 +596,7 @@ func get_base_reward_per_increment*(
     total_active_balance: Gwei): Gwei =
   get_base_reward_per_increment_sqrt(integer_squareroot(total_active_balance))
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/altair/beacon-chain.md#get_base_reward
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/altair/beacon-chain.md#get_base_reward
 func get_base_reward(
     state: altair.BeaconState | bellatrix.BeaconState, index: ValidatorIndex,
     base_reward_per_increment: Gwei): Gwei =
@@ -606,7 +606,7 @@ func get_base_reward(
     state.validators[index].effective_balance div EFFECTIVE_BALANCE_INCREMENT
   increments * base_reward_per_increment
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#attestations
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#attestations
 proc check_attestation*(
     state: ForkyBeaconState, attestation: SomeAttestation, flags: UpdateFlags,
     cache: var StateCache): Result[void, cstring] =
@@ -720,7 +720,7 @@ proc process_attestation*(
 
   ok()
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/altair/beacon-chain.md#get_next_sync_committee_indices
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/altair/beacon-chain.md#get_next_sync_committee_indices
 func get_next_sync_committee_keys(state: altair.BeaconState | bellatrix.BeaconState):
     array[SYNC_COMMITTEE_SIZE, ValidatorPubKey] =
   ## Return the sequence of sync committee indices, with possible duplicates,
@@ -756,7 +756,7 @@ func get_next_sync_committee_keys(state: altair.BeaconState | bellatrix.BeaconSt
     i += 1'u64
   res
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/altair/beacon-chain.md#get_next_sync_committee
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/altair/beacon-chain.md#get_next_sync_committee
 proc get_next_sync_committee*(state: altair.BeaconState | bellatrix.BeaconState):
     SyncCommittee =
   ## Return the *next* sync committee for a given ``state``.
diff --git a/beacon_chain/spec/crypto.nim b/beacon_chain/spec/crypto.nim
index e07c426a6..83d31825f 100644
--- a/beacon_chain/spec/crypto.nim
+++ b/beacon_chain/spec/crypto.nim
@@ -1,5 +1,5 @@
 # beacon_chain
-# Copyright (c) 2018-2021 Status Research & Development GmbH
+# Copyright (c) 2018-2022 Status Research & Development GmbH
 # Licensed and distributed under either of
 #   * MIT license (license terms in the root directory or at https://opensource.org/licenses/MIT).
 #   * Apache v2 license (license terms in the root directory or at https://www.apache.org/licenses/LICENSE-2.0).
@@ -192,7 +192,7 @@ func finish*(agg: AggregateSignature): CookedSig {.inline.} =
   sig.finish(agg)
   CookedSig(sig)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#bls-signatures
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#bls-signatures
 proc blsVerify*(
     pubkey: CookedPubKey, message: openArray[byte],
     signature: CookedSig): bool =
@@ -205,7 +205,7 @@ proc blsVerify*(
   ## to enforce correct usage.
   PublicKey(pubkey).verify(message, blscurve.Signature(signature))
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#bls-signatures
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#bls-signatures
 proc blsVerify*(
     pubkey: ValidatorPubKey, message: openArray[byte],
     signature: CookedSig): bool =
diff --git a/beacon_chain/spec/datatypes/altair.nim b/beacon_chain/spec/datatypes/altair.nim
index 062e7eba9..6cb7fc03b 100644
--- a/beacon_chain/spec/datatypes/altair.nim
+++ b/beacon_chain/spec/datatypes/altair.nim
@@ -36,7 +36,7 @@ from ssz_serialization/merkleization import GeneralizedIndex
 export merkleization.GeneralizedIndex
 
 const
-  # https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/altair/beacon-chain.md#incentivization-weights
+  # https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/altair/beacon-chain.md#incentivization-weights
   TIMELY_SOURCE_WEIGHT* = 14
   TIMELY_TARGET_WEIGHT* = 26
   TIMELY_HEAD_WEIGHT* = 14
@@ -47,7 +47,7 @@ const
   PARTICIPATION_FLAG_WEIGHTS* =
     [TIMELY_SOURCE_WEIGHT, TIMELY_TARGET_WEIGHT, TIMELY_HEAD_WEIGHT]
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/altair/validator.md#misc
+  # https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/altair/validator.md#misc
   TARGET_AGGREGATORS_PER_SYNC_SUBCOMMITTEE* = 16
   SYNC_COMMITTEE_SUBNET_COUNT* = 4
 
@@ -55,12 +55,12 @@ const
   FINALIZED_ROOT_INDEX* = 105.GeneralizedIndex
   NEXT_SYNC_COMMITTEE_INDEX* = 55.GeneralizedIndex
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/altair/beacon-chain.md#participation-flag-indices
+  # https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/altair/beacon-chain.md#participation-flag-indices
   TIMELY_SOURCE_FLAG_INDEX* = 0
   TIMELY_TARGET_FLAG_INDEX* = 1
   TIMELY_HEAD_FLAG_INDEX* = 2
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/altair/beacon-chain.md#inactivity-penalties
+  # https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/altair/beacon-chain.md#inactivity-penalties
   INACTIVITY_SCORE_BIAS* = 4
   INACTIVITY_SCORE_RECOVERY_RATE* = 16
 
@@ -78,13 +78,13 @@ static: doAssert TIMELY_SOURCE_WEIGHT + TIMELY_TARGET_WEIGHT +
 type
   ### New types
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/altair/beacon-chain.md#custom-types
+  # https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/altair/beacon-chain.md#custom-types
   ParticipationFlags* = uint8
 
   EpochParticipationFlags* =
     HashList[ParticipationFlags, Limit VALIDATOR_REGISTRY_LIMIT]
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/altair/beacon-chain.md#syncaggregate
+  # https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/altair/beacon-chain.md#syncaggregate
   SyncAggregate* = object
     sync_committee_bits*: BitArray[SYNC_COMMITTEE_SIZE]
     sync_committee_signature*: ValidatorSig
@@ -93,12 +93,12 @@ type
     sync_committee_bits*: BitArray[SYNC_COMMITTEE_SIZE]
     sync_committee_signature*: TrustedSig
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/altair/beacon-chain.md#synccommittee
+  # https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/altair/beacon-chain.md#synccommittee
   SyncCommittee* = object
     pubkeys*: HashArray[Limit SYNC_COMMITTEE_SIZE, ValidatorPubKey]
     aggregate_pubkey*: ValidatorPubKey
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/altair/validator.md#synccommitteemessage
+  # https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/altair/validator.md#synccommitteemessage
   SyncCommitteeMessage* = object
     slot*: Slot ##\
     ## Slot to which this contribution pertains
@@ -112,7 +112,7 @@ type
     signature*: ValidatorSig ##\
     ## Signature by the validator over the block root of `slot`
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/altair/validator.md#synccommitteecontribution
+  # https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/altair/validator.md#synccommitteecontribution
   SyncCommitteeAggregationBits* =
     BitArray[SYNC_SUBCOMMITTEE_SIZE]
 
@@ -134,18 +134,18 @@ type
     signature*: ValidatorSig  ##\
     ## Signature by the validator(s) over the block root of `slot`
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/altair/validator.md#contributionandproof
+  # https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/altair/validator.md#contributionandproof
   ContributionAndProof* = object
     aggregator_index*: uint64
     contribution*: SyncCommitteeContribution
     selection_proof*: ValidatorSig
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/altair/validator.md#signedcontributionandproof
+  # https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/altair/validator.md#signedcontributionandproof
   SignedContributionAndProof* = object
     message*: ContributionAndProof
     signature*: ValidatorSig
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/altair/validator.md#syncaggregatorselectiondata
+  # https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/altair/validator.md#syncaggregatorselectiondata
   SyncAggregatorSelectionData* = object
     slot*: Slot
     subcommittee_index*: uint64
@@ -192,7 +192,7 @@ type
     previous_max_active_participants*: uint64
     current_max_active_participants*: uint64
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/altair/beacon-chain.md#beaconstate
+  # https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/altair/beacon-chain.md#beaconstate
   BeaconState* = object
     # Versioning
     genesis_time*: uint64
@@ -277,7 +277,7 @@ type
     data*: BeaconState
     root*: Eth2Digest # hash_tree_root(data)
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#beaconblock
+  # https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#beaconblock
   BeaconBlock* = object
     ## For each slot, a proposer is chosen from the validator pool to propose
     ## a new block. Once the block as been proposed, it is transmitted to
@@ -333,7 +333,7 @@ type
     state_root*: Eth2Digest ##\
     body*: TrustedBeaconBlockBody
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/altair/beacon-chain.md#beaconblockbody
+  # https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/altair/beacon-chain.md#beaconblockbody
   BeaconBlockBody* = object
     randao_reveal*: ValidatorSig
     eth1_data*: Eth1Data ##\
@@ -404,7 +404,7 @@ type
     # [New in Altair]
     sync_aggregate*: TrustedSyncAggregate
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#signedbeaconblock
+  # https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#signedbeaconblock
   SignedBeaconBlock* = object
     message*: BeaconBlock
     signature*: ValidatorSig
diff --git a/beacon_chain/spec/datatypes/base.nim b/beacon_chain/spec/datatypes/base.nim
index de90ee7b1..4d9e68138 100644
--- a/beacon_chain/spec/datatypes/base.nim
+++ b/beacon_chain/spec/datatypes/base.nim
@@ -110,7 +110,7 @@ type
   # ---------------------------------------------------------------
   DomainType* = distinct array[4, byte]
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#custom-types
+  # https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#custom-types
   Eth2Domain* = array[32, byte]
 
   # https://github.com/nim-lang/Nim/issues/574 and be consistent across
@@ -153,7 +153,7 @@ type
   # SSZ / hashing purposes
   JustificationBits* = distinct uint8
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#proposerslashing
+  # https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#proposerslashing
   ProposerSlashing* = object
     signed_header_1*: SignedBeaconBlockHeader
     signed_header_2*: SignedBeaconBlockHeader
@@ -165,7 +165,7 @@ type
     signed_header_1*: TrustedSignedBeaconBlockHeader
     signed_header_2*: TrustedSignedBeaconBlockHeader
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#attesterslashing
+  # https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#attesterslashing
   AttesterSlashing* = object
     attestation_1*: IndexedAttestation
     attestation_2*: IndexedAttestation
@@ -177,7 +177,7 @@ type
     attestation_1*: TrustedIndexedAttestation
     attestation_2*: TrustedIndexedAttestation
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#indexedattestation
+  # https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#indexedattestation
   IndexedAttestation* = object
     attesting_indices*: List[uint64, Limit MAX_VALIDATORS_PER_COMMITTEE]
     data*: AttestationData
@@ -193,7 +193,7 @@ type
 
   CommitteeValidatorsBits* = BitList[Limit MAX_VALIDATORS_PER_COMMITTEE]
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#attestation
+  # https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#attestation
   Attestation* = object
     aggregation_bits*: CommitteeValidatorsBits
     data*: AttestationData
@@ -209,17 +209,17 @@ type
 
   ForkDigest* = distinct array[4, byte]
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#forkdata
+  # https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#forkdata
   ForkData* = object
     current_version*: Version
     genesis_validators_root*: Eth2Digest
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#checkpoint
+  # https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#checkpoint
   Checkpoint* = object
     epoch*: Epoch
     root*: Eth2Digest
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#AttestationData
+  # https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#AttestationData
   AttestationData* = object
     slot*: Slot
 
@@ -232,20 +232,20 @@ type
     source*: Checkpoint
     target*: Checkpoint
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#deposit
+  # https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#deposit
   Deposit* = object
     proof*: array[DEPOSIT_CONTRACT_TREE_DEPTH + 1, Eth2Digest] ##\
     ## Merkle path to deposit root
 
     data*: DepositData
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#depositmessage
+  # https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#depositmessage
   DepositMessage* = object
     pubkey*: ValidatorPubKey
     withdrawal_credentials*: Eth2Digest
     amount*: Gwei
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#depositdata
+  # https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#depositdata
   DepositData* = object
     pubkey*: ValidatorPubKey
     withdrawal_credentials*: Eth2Digest
@@ -254,7 +254,7 @@ type
     # if the deposit should be added or not during processing
     signature*: ValidatorSig  # Signing over DepositMessage
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#voluntaryexit
+  # https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#voluntaryexit
   VoluntaryExit* = object
     epoch*: Epoch ##\
     ## Earliest epoch when voluntary exit can be processed
@@ -283,7 +283,7 @@ type
     pubkey*: CookedPubKey
     withdrawal_credentials*: Eth2Digest
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#validator
+  # https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#validator
   Validator* = object
     pubkey*: ValidatorPubKey
 
@@ -305,7 +305,7 @@ type
     withdrawable_epoch*: Epoch ##\
     ## When validator can withdraw or transfer funds
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#pendingattestation
+  # https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#pendingattestation
   PendingAttestation* = object
     aggregation_bits*: CommitteeValidatorsBits
     data*: AttestationData
@@ -314,12 +314,12 @@ type
 
     proposer_index*: uint64
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#historicalbatch
+  # https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#historicalbatch
   HistoricalBatch* = object
     block_roots* : array[SLOTS_PER_HISTORICAL_ROOT, Eth2Digest]
     state_roots* : array[SLOTS_PER_HISTORICAL_ROOT, Eth2Digest]
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#fork
+  # https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#fork
   Fork* = object
     previous_version*: Version
     current_version*: Version
@@ -327,13 +327,13 @@ type
     epoch*: Epoch ##\
     ## Epoch of latest fork
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#eth1data
+  # https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#eth1data
   Eth1Data* = object
     deposit_root*: Eth2Digest
     deposit_count*: uint64
     block_hash*: Eth2Digest
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#signedvoluntaryexit
+  # https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#signedvoluntaryexit
   SignedVoluntaryExit* = object
     message*: VoluntaryExit
     signature*: ValidatorSig
@@ -342,7 +342,7 @@ type
     message*: VoluntaryExit
     signature*: TrustedSig
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#beaconblockheader
+  # https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#beaconblockheader
   BeaconBlockHeader* = object
     slot*: Slot
     proposer_index*: uint64
@@ -350,14 +350,14 @@ type
     state_root*: Eth2Digest
     body_root*: Eth2Digest
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#signingdata
+  # https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#signingdata
   SigningData* = object
     object_root*: Eth2Digest
     domain*: Eth2Domain
 
   GraffitiBytes* = distinct array[MAX_GRAFFITI_SIZE, byte]
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#signedbeaconblockheader
+  # https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#signedbeaconblockheader
   SignedBeaconBlockHeader* = object
     message*: BeaconBlockHeader
     signature*: ValidatorSig
@@ -395,7 +395,7 @@ type
     branch*: array[DEPOSIT_CONTRACT_TREE_DEPTH, Eth2Digest]
     deposit_count*: array[32, byte] # Uint256
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#validator
+  # https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#validator
   ValidatorStatus* = object
     # This is a validator without the expensive, immutable, append-only parts
     # serialized. They're represented in memory to allow in-place SSZ reading
@@ -485,7 +485,7 @@ type
 
     flags*: set[RewardFlags]
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#get_total_balance
+  # https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#get_total_balance
   TotalBalances* = object
     # The total effective balance of all active validators during the _current_
     # epoch.
@@ -513,7 +513,7 @@ type
     previous_epoch_head_attesters_raw*: Gwei
 
 const
-  # https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#domain-types
+  # https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#domain-types
   DOMAIN_BEACON_PROPOSER* = DomainType([byte 0x00, 0x00, 0x00, 0x00])
   DOMAIN_BEACON_ATTESTER* = DomainType([byte 0x01, 0x00, 0x00, 0x00])
   DOMAIN_RANDAO* = DomainType([byte 0x02, 0x00, 0x00, 0x00])
@@ -522,7 +522,7 @@ const
   DOMAIN_SELECTION_PROOF* = DomainType([byte 0x05, 0x00, 0x00, 0x00])
   DOMAIN_AGGREGATE_AND_PROOF* = DomainType([byte 0x06, 0x00, 0x00, 0x00])
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/altair/beacon-chain.md#domain-types
+  # https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/altair/beacon-chain.md#domain-types
   DOMAIN_SYNC_COMMITTEE* = DomainType([byte 0x07, 0x00, 0x00, 0x00])
   DOMAIN_SYNC_COMMITTEE_SELECTION_PROOF* = DomainType([byte 0x08, 0x00, 0x00, 0x00])
   DOMAIN_CONTRIBUTION_AND_PROOF* = DomainType([byte 0x09, 0x00, 0x00, 0x00])
diff --git a/beacon_chain/spec/datatypes/bellatrix.nim b/beacon_chain/spec/datatypes/bellatrix.nim
index 98187bf5b..079ed63f2 100644
--- a/beacon_chain/spec/datatypes/bellatrix.nim
+++ b/beacon_chain/spec/datatypes/bellatrix.nim
@@ -152,7 +152,7 @@ type
     data*: BeaconState
     root*: Eth2Digest # hash_tree_root(data)
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#beaconblock
+  # https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#beaconblock
   BeaconBlock* = object
     ## For each slot, a proposer is chosen from the validator pool to propose
     ## a new block. Once the block as been proposed, it is transmitted to
@@ -278,7 +278,7 @@ type
     # Execution
     execution_payload*: ExecutionPayload  # [New in Merge]
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#signedbeaconblock
+  # https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#signedbeaconblock
   SignedBeaconBlock* = object
     message*: BeaconBlock
     signature*: ValidatorSig
diff --git a/beacon_chain/spec/datatypes/phase0.nim b/beacon_chain/spec/datatypes/phase0.nim
index 34e513d1e..899da2ae0 100644
--- a/beacon_chain/spec/datatypes/phase0.nim
+++ b/beacon_chain/spec/datatypes/phase0.nim
@@ -1,5 +1,5 @@
 # beacon_chain
-# Copyright (c) 2021 Status Research & Development GmbH
+# Copyright (c) 2021-2022 Status Research & Development GmbH
 # Licensed and distributed under either of
 #   * MIT license (license terms in the root directory or at https://opensource.org/licenses/MIT).
 #   * Apache v2 license (license terms in the root directory or at https://www.apache.org/licenses/LICENSE-2.0).
@@ -32,7 +32,7 @@ import
 export base
 
 type
-  # https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#beaconstate
+  # https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#beaconstate
   BeaconState* = object
     # Versioning
     genesis_time*: uint64
@@ -92,7 +92,7 @@ type
     data*: BeaconState
     root*: Eth2Digest # hash_tree_root(data)
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#beaconblock
+  # https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#beaconblock
   BeaconBlock* = object
     ## For each slot, a proposer is chosen from the validator pool to propose
     ## a new block. Once the block as been proposed, it is transmitted to
@@ -153,7 +153,7 @@ type
     state_root*: Eth2Digest ##\
     body*: TrustedBeaconBlockBody
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#beaconblockbody
+  # https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#beaconblockbody
   BeaconBlockBody* = object
     randao_reveal*: ValidatorSig
     eth1_data*: Eth1Data
@@ -202,7 +202,7 @@ type
     deposits*: List[Deposit, Limit MAX_DEPOSITS]
     voluntary_exits*: List[TrustedSignedVoluntaryExit, Limit MAX_VOLUNTARY_EXITS]
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#signedbeaconblock
+  # https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#signedbeaconblock
   SignedBeaconBlock* = object
     message*: BeaconBlock
     signature*: ValidatorSig
diff --git a/beacon_chain/spec/digest.nim b/beacon_chain/spec/digest.nim
index 38700674e..4af842c35 100644
--- a/beacon_chain/spec/digest.nim
+++ b/beacon_chain/spec/digest.nim
@@ -1,5 +1,5 @@
 # beacon_chain
-# Copyright (c) 2018-2021 Status Research & Development GmbH
+# Copyright (c) 2018-2022 Status Research & Development GmbH
 # Licensed and distributed under either of
 #   * MIT license (license terms in the root directory or at https://opensource.org/licenses/MIT).
 #   * Apache v2 license (license terms in the root directory or at https://www.apache.org/licenses/LICENSE-2.0).
@@ -7,7 +7,7 @@
 
 # Serenity hash function / digest
 #
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#hash
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#hash
 #
 # In Phase 0 the beacon chain is deployed with SHA256 (SHA2-256).
 # Note that is is different from Keccak256 (often mistakenly called SHA3-256)
diff --git a/beacon_chain/spec/eth2_apis/rest_types.nim b/beacon_chain/spec/eth2_apis/rest_types.nim
index 48cba1894..dee3876d6 100644
--- a/beacon_chain/spec/eth2_apis/rest_types.nim
+++ b/beacon_chain/spec/eth2_apis/rest_types.nim
@@ -1,5 +1,5 @@
 # beacon_chain
-# Copyright (c) 2018-2021 Status Research & Development GmbH
+# Copyright (c) 2018-2022 Status Research & Development GmbH
 # Licensed and distributed under either of
 #   * MIT license (license terms in the root directory or at https://opensource.org/licenses/MIT).
 #   * Apache v2 license (license terms in the root directory or at https://www.apache.org/licenses/LICENSE-2.0).
@@ -304,7 +304,7 @@ type
     DEPOSIT_NETWORK_ID*: uint64
     DEPOSIT_CONTRACT_ADDRESS*: Eth1Address
 
-    # https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#constants
+    # https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#constants
     # GENESIS_SLOT
     # GENESIS_EPOCH
     # FAR_FUTURE_EPOCH
@@ -322,7 +322,7 @@ type
     DOMAIN_SELECTION_PROOF*: DomainType
     DOMAIN_AGGREGATE_AND_PROOF*: DomainType
 
-    # https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/altair/beacon-chain.md#constants
+    # https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/altair/beacon-chain.md#constants
     TIMELY_SOURCE_FLAG_INDEX*: byte
     TIMELY_TARGET_FLAG_INDEX*: byte
     TIMELY_HEAD_FLAG_INDEX*: byte
@@ -343,7 +343,7 @@ type
     EPOCHS_PER_RANDOM_SUBNET_SUBSCRIPTION*: uint64
     ATTESTATION_SUBNET_COUNT*: uint64
 
-    # https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/altair/validator.md#constants
+    # https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/altair/validator.md#constants
     TARGET_AGGREGATORS_PER_SYNC_SUBCOMMITTEE*: uint64
     SYNC_COMMITTEE_SUBNET_COUNT*: uint64
 
diff --git a/beacon_chain/spec/forks.nim b/beacon_chain/spec/forks.nim
index 786322cb1..ade7b1893 100644
--- a/beacon_chain/spec/forks.nim
+++ b/beacon_chain/spec/forks.nim
@@ -487,7 +487,7 @@ func toBeaconBlockFork*(fork: BeaconStateFork): BeaconBlockFork =
   of BeaconStateFork.Altair:    BeaconBlockFork.Altair
   of BeaconStateFork.Bellatrix: BeaconBlockFork.Bellatrix
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#compute_fork_data_root
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#compute_fork_data_root
 func compute_fork_data_root*(current_version: Version,
     genesis_validators_root: Eth2Digest): Eth2Digest =
   ## Return the 32-byte fork data root for the ``current_version`` and
@@ -499,7 +499,7 @@ func compute_fork_data_root*(current_version: Version,
     genesis_validators_root: genesis_validators_root
   ))
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#compute_fork_digest
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#compute_fork_digest
 func compute_fork_digest*(current_version: Version,
                           genesis_validators_root: Eth2Digest): ForkDigest =
   ## Return the 4-byte fork digest for the ``current_version`` and
diff --git a/beacon_chain/spec/helpers.nim b/beacon_chain/spec/helpers.nim
index e78f2f94a..dbee19935 100644
--- a/beacon_chain/spec/helpers.nim
+++ b/beacon_chain/spec/helpers.nim
@@ -24,7 +24,7 @@ import
 export
   forks, eth2_merkleization, ssz_codec
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#integer_squareroot
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#integer_squareroot
 func integer_squareroot*(n: SomeInteger): SomeInteger =
   ## Return the largest integer ``x`` such that ``x**2 <= n``.
   doAssert n >= 0'u64
@@ -268,7 +268,7 @@ func verify_merkle_multiproof*(
   if calc.isErr: return false
   calc.get == root
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#is_valid_merkle_branch
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#is_valid_merkle_branch
 func is_valid_merkle_branch*(leaf: Eth2Digest, branch: openArray[Eth2Digest],
                              depth: int, index: uint64,
                              root: Eth2Digest): bool =
@@ -341,7 +341,7 @@ func build_proof*(anchor: object, leaf_index: uint64,
   doAssert proof.len == log2trunc(leaf_index)
   build_proof_impl(anchor, leaf_index, proof)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#is_active_validator
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#is_active_validator
 func is_active_validator*(validator: Validator, epoch: Epoch): bool =
   ## Check if ``validator`` is active
   validator.activation_epoch <= epoch and epoch < validator.exit_epoch
@@ -353,7 +353,7 @@ func is_exited_validator*(validator: Validator, epoch: Epoch): bool =
 func is_withdrawable_validator*(validator: Validator, epoch: Epoch): bool =
   epoch >= validator.withdrawable_epoch
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#get_active_validator_indices
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#get_active_validator_indices
 iterator get_active_validator_indices*(state: ForkyBeaconState, epoch: Epoch):
     ValidatorIndex =
   for idx in 0..<state.validators.len:
@@ -379,17 +379,17 @@ func get_active_validator_indices_len*(
   withState(state):
     get_active_validator_indices_len(state.data, epoch)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#get_current_epoch
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#get_current_epoch
 func get_current_epoch*(state: ForkyBeaconState): Epoch =
   ## Return the current epoch.
   state.slot.epoch
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#get_current_epoch
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#get_current_epoch
 func get_current_epoch*(state: ForkedHashedBeaconState): Epoch =
   ## Return the current epoch.
   withState(state): get_current_epoch(state.data)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#get_randao_mix
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#get_randao_mix
 func get_randao_mix*(state: ForkyBeaconState, epoch: Epoch): Eth2Digest =
   ## Returns the randao mix at a recent ``epoch``.
   state.randao_mixes[epoch mod EPOCHS_PER_HISTORICAL_VECTOR]
@@ -405,7 +405,7 @@ func uint_to_bytes*(x: uint32): array[4, byte] = toBytesLE(x)
 func uint_to_bytes*(x: uint16): array[2, byte] = toBytesLE(x)
 func uint_to_bytes*(x: uint8): array[1, byte] = toBytesLE(x)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#compute_domain
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#compute_domain
 func compute_domain*(
     domain_type: DomainType,
     fork_version: Version,
@@ -416,7 +416,7 @@ func compute_domain*(
   result[0..3] = domain_type.data
   result[4..31] = fork_data_root.data.toOpenArray(0, 27)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#get_domain
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#get_domain
 func get_domain*(
     fork: Fork,
     domain_type: DomainType,
@@ -437,7 +437,7 @@ func get_domain*(
   ## of a message.
   get_domain(state.fork, domain_type, epoch, state.genesis_validators_root)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#compute_signing_root
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#compute_signing_root
 func compute_signing_root*(ssz_object: auto, domain: Eth2Domain): Eth2Digest =
   ## Return the signing root of an object by calculating the root of the
   ## object-domain tree.
@@ -447,7 +447,7 @@ func compute_signing_root*(ssz_object: auto, domain: Eth2Domain): Eth2Digest =
   )
   hash_tree_root(domain_wrapped_object)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#get_seed
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#get_seed
 func get_seed*(state: ForkyBeaconState, epoch: Epoch, domain_type: DomainType):
     Eth2Digest =
   ## Return the seed at ``epoch``.
@@ -465,12 +465,12 @@ func get_seed*(state: ForkyBeaconState, epoch: Epoch, domain_type: DomainType):
       epoch + EPOCHS_PER_HISTORICAL_VECTOR - MIN_SEED_LOOKAHEAD - 1).data
   eth2digest(seed_input)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/altair/beacon-chain.md#add_flag
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/altair/beacon-chain.md#add_flag
 func add_flag*(flags: ParticipationFlags, flag_index: int): ParticipationFlags =
   let flag = ParticipationFlags(1'u8 shl flag_index)
   flags or flag
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/altair/beacon-chain.md#has_flag
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/altair/beacon-chain.md#has_flag
 func has_flag*(flags: ParticipationFlags, flag_index: int): bool =
   let flag = ParticipationFlags(1'u8 shl flag_index)
   (flags and flag) == flag
diff --git a/beacon_chain/spec/network.nim b/beacon_chain/spec/network.nim
index e784b8ccc..80a490aca 100644
--- a/beacon_chain/spec/network.nim
+++ b/beacon_chain/spec/network.nim
@@ -168,7 +168,7 @@ func getTargetGossipState*(
     raiseAssert "Unknown target gossip state"
 
 func nearSyncCommitteePeriod*(epoch: Epoch): Option[uint64] =
-  # https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/altair/validator.md#sync-committee-subnet-stability
+  # https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/altair/validator.md#sync-committee-subnet-stability
   if epoch.is_sync_committee_period():
     return some 0'u64
   let epochsBefore =
@@ -187,7 +187,7 @@ func getSyncSubnets*(
     if not nodeHasPubKey(pubkey):
       continue
 
-    # https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/altair/validator.md#broadcast-sync-committee-message
+    # https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/altair/validator.md#broadcast-sync-committee-message
     # The first quarter of the pubkeys map to subnet 0, the second quarter to
     # subnet 1, the third quarter to subnet 2 and the final quarter to subnet
     # 3.
diff --git a/beacon_chain/spec/presets.nim b/beacon_chain/spec/presets.nim
index a4aaa36bf..d33e74938 100644
--- a/beacon_chain/spec/presets.nim
+++ b/beacon_chain/spec/presets.nim
@@ -1,5 +1,5 @@
 # beacon_chain
-# Copyright (c) 2018-2021 Status Research & Development GmbH
+# Copyright (c) 2018-2022 Status Research & Development GmbH
 # Licensed and distributed under either of
 #   * MIT license (license terms in the root directory or at https://opensource.org/licenses/MIT).
 #   * Apache v2 license (license terms in the root directory or at https://www.apache.org/licenses/LICENSE-2.0).
@@ -12,7 +12,7 @@ import
   stew/[byteutils], stint, web3/[ethtypes]
 
 const
-  # https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#withdrawal-prefixes
+  # https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#withdrawal-prefixes
   BLS_WITHDRAWAL_PREFIX*: byte = 0
   ETH1_ADDRESS_WITHDRAWAL_PREFIX*: byte = 1
 
diff --git a/beacon_chain/spec/signatures.nim b/beacon_chain/spec/signatures.nim
index e898d66a2..f41bbb40d 100644
--- a/beacon_chain/spec/signatures.nim
+++ b/beacon_chain/spec/signatures.nim
@@ -178,7 +178,7 @@ func compute_deposit_signing_root*(
     domain = compute_domain(DOMAIN_DEPOSIT, version)
   compute_signing_root(deposit_message, domain)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#deposits
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#deposits
 func get_deposit_signature*(preset: RuntimeConfig,
                             deposit: DepositData,
                             privkey: ValidatorPrivKey): CookedSig =
@@ -230,7 +230,7 @@ proc verify_voluntary_exit_signature*(
 
     blsVerify(pubkey, signing_root.data, signature)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/altair/validator.md#prepare-sync-committee-message
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/altair/validator.md#prepare-sync-committee-message
 func compute_sync_committee_message_signing_root*(
     fork: Fork, genesis_validators_root: Eth2Digest,
     slot: Slot, beacon_block_root: Eth2Digest): Eth2Digest =
@@ -265,7 +265,7 @@ proc verify_sync_committee_signature*(
 
   blsFastAggregateVerify(pubkeys, signing_root.data, signature)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/altair/validator.md#aggregation-selection
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/altair/validator.md#aggregation-selection
 func compute_sync_committee_selection_proof_signing_root*(
     fork: Fork, genesis_validators_root: Eth2Digest,
     slot: Slot, subcommittee_index: uint64): Eth2Digest =
@@ -296,7 +296,7 @@ proc verify_sync_committee_selection_proof*(
 
     blsVerify(pubkey, signing_root.data, signature)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/altair/validator.md#signature
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/altair/validator.md#signature
 func compute_contribution_and_proof_signing_root*(
     fork: Fork, genesis_validators_root: Eth2Digest,
     msg: ContributionAndProof): Eth2Digest =
@@ -315,7 +315,7 @@ proc get_contribution_and_proof_signature*(
   blsSign(privkey, signing_root.data)
 
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/altair/validator.md#aggregation-selection
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/altair/validator.md#aggregation-selection
 proc is_sync_committee_aggregator*(signature: ValidatorSig): bool =
   let
     signatureDigest = eth2digest(signature.blob)
diff --git a/beacon_chain/spec/signatures_batch.nim b/beacon_chain/spec/signatures_batch.nim
index 4762fc7a3..916b077cc 100644
--- a/beacon_chain/spec/signatures_batch.nim
+++ b/beacon_chain/spec/signatures_batch.nim
@@ -74,7 +74,7 @@ proc aggregateAttesters(
     # Aggregation spec requires non-empty collection
     # - https://tools.ietf.org/html/draft-irtf-cfrg-bls-signature-04
     # Eth2 spec requires at least one attesting index in attestation
-    # - https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#is_valid_indexed_attestation
+    # - https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#is_valid_indexed_attestation
     return err("aggregateAttesters: no attesting indices")
 
   let
@@ -103,7 +103,7 @@ proc aggregateAttesters(
     # Aggregation spec requires non-empty collection
     # - https://tools.ietf.org/html/draft-irtf-cfrg-bls-signature-04
     # Eth2 spec requires at least one attesting index in attestation
-    # - https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#is_valid_indexed_attestation
+    # - https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#is_valid_indexed_attestation
     return err("aggregateAttesters: no attesting indices")
 
   var attestersAgg{.noInit.}: AggregatePublicKey
diff --git a/beacon_chain/spec/state_transition.nim b/beacon_chain/spec/state_transition.nim
index 9eb4c9eed..b4775a94f 100644
--- a/beacon_chain/spec/state_transition.nim
+++ b/beacon_chain/spec/state_transition.nim
@@ -6,7 +6,7 @@
 # at your option. This file may not be copied, modified, or distributed except according to those terms.
 
 # State transition, as described in
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#beacon-chain-state-transition-function
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#beacon-chain-state-transition-function
 #
 # The entry point is `state_transition` which is at the bottom of the file!
 #
@@ -51,7 +51,7 @@ import
 
 export results, extras, phase0, altair, bellatrix
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#beacon-chain-state-transition-function
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#beacon-chain-state-transition-function
 proc verify_block_signature(
     state: ForkyBeaconState, signed_block: SomeForkySignedBeaconBlock):
     Result[void, cstring] =
@@ -68,7 +68,7 @@ proc verify_block_signature(
 
   ok()
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#beacon-chain-state-transition-function
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#beacon-chain-state-transition-function
 proc verifyStateRoot(
     state: ForkyBeaconState, blck: ForkyBeaconBlock | ForkySigVerifiedBeaconBlock):
     Result[void, cstring] =
@@ -97,7 +97,7 @@ func noRollback*() =
 # Hashed-state transition functions
 # ---------------------------------------------------------------
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#beacon-chain-state-transition-function
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#beacon-chain-state-transition-function
 func process_slot*(
     state: var ForkyBeaconState, pre_state_root: Eth2Digest) =
   # `process_slot` is the first stage of per-slot processing - it is run for
@@ -353,7 +353,7 @@ proc makeBeaconBlock*(
 
   ok(blck)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/altair/validator.md#preparing-a-beaconblock
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/altair/validator.md#preparing-a-beaconblock
 template partialBeaconBlock(
     cfg: RuntimeConfig,
     state: var altair.HashedBeaconState,
diff --git a/beacon_chain/spec/state_transition_block.nim b/beacon_chain/spec/state_transition_block.nim
index 2554319d1..cbc104426 100644
--- a/beacon_chain/spec/state_transition_block.nim
+++ b/beacon_chain/spec/state_transition_block.nim
@@ -6,7 +6,7 @@
 # at your option. This file may not be copied, modified, or distributed except according to those terms.
 
 # State transition - block processing, as described in
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#block-processing
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#block-processing
 #
 # The entry point is `process_block` which is at the bottom of this file.
 #
@@ -28,7 +28,7 @@ import
 
 export extras, phase0, altair
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#block-header
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#block-header
 func process_block_header*(
     state: var ForkyBeaconState, blck: SomeSomeBeaconBlock, flags: UpdateFlags,
     cache: var StateCache): Result[void, cstring] =
@@ -71,7 +71,7 @@ func `xor`[T: array](a, b: T): T =
   for i in 0..<result.len:
     result[i] = a[i] xor b[i]
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#randao
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#randao
 proc process_randao(
     state: var ForkyBeaconState, body: SomeSomeBeaconBlockBody, flags: UpdateFlags,
     cache: var StateCache): Result[void, cstring] =
@@ -104,7 +104,7 @@ proc process_randao(
 
   ok()
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#eth1-data
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#eth1-data
 func process_eth1_data(state: var ForkyBeaconState, body: SomeSomeBeaconBlockBody): Result[void, cstring]=
   if not state.eth1_data_votes.add body.eth1_data:
     # Count is reset  in process_final_updates, so this should never happen
@@ -115,14 +115,14 @@ func process_eth1_data(state: var ForkyBeaconState, body: SomeSomeBeaconBlockBod
     state.eth1_data = body.eth1_data
   ok()
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#is_slashable_validator
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#is_slashable_validator
 func is_slashable_validator(validator: Validator, epoch: Epoch): bool =
   # Check if ``validator`` is slashable.
   (not validator.slashed) and
     (validator.activation_epoch <= epoch) and
     (epoch < validator.withdrawable_epoch)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#proposer-slashings
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#proposer-slashings
 proc check_proposer_slashing*(
     state: ForkyBeaconState, proposer_slashing: SomeProposerSlashing,
     flags: UpdateFlags):
@@ -171,7 +171,7 @@ proc check_proposer_slashing*(
   withState(state):
     check_proposer_slashing(state.data, proposer_slashing, flags)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#proposer-slashings
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#proposer-slashings
 proc process_proposer_slashing*(
     cfg: RuntimeConfig, state: var ForkyBeaconState,
     proposer_slashing: SomeProposerSlashing, flags: UpdateFlags,
@@ -184,7 +184,7 @@ proc process_proposer_slashing*(
     cache)
   ok()
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#is_slashable_attestation_data
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#is_slashable_attestation_data
 func is_slashable_attestation_data(
     data_1: AttestationData, data_2: AttestationData): bool =
   ## Check if ``data_1`` and ``data_2`` are slashable according to Casper FFG
@@ -196,7 +196,7 @@ func is_slashable_attestation_data(
     (data_1.source.epoch < data_2.source.epoch and
      data_2.target.epoch < data_1.target.epoch)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#attester-slashings
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#attester-slashings
 proc check_attester_slashing*(
        state: ForkyBeaconState,
        attester_slashing: SomeAttesterSlashing,
@@ -236,7 +236,7 @@ proc check_attester_slashing*(
   withState(state):
     check_attester_slashing(state.data, attester_slashing, flags)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#attester-slashings
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#attester-slashings
 proc process_attester_slashing*(
     cfg: RuntimeConfig,
     state: var ForkyBeaconState,
@@ -322,7 +322,7 @@ proc process_deposit*(cfg: RuntimeConfig,
 
   ok()
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#voluntary-exits
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#voluntary-exits
 proc check_voluntary_exit*(
     cfg: RuntimeConfig,
     state: ForkyBeaconState,
@@ -382,7 +382,7 @@ proc check_voluntary_exit*(
   withState(state):
     check_voluntary_exit(cfg, state.data, signed_voluntary_exit, flags)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#voluntary-exits
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#voluntary-exits
 proc process_voluntary_exit*(
     cfg: RuntimeConfig,
     state: var ForkyBeaconState,
@@ -395,7 +395,7 @@ proc process_voluntary_exit*(
     cache)
   ok()
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#operations
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#operations
 proc process_operations(cfg: RuntimeConfig,
                         state: var ForkyBeaconState,
                         body: SomeSomeBeaconBlockBody,
@@ -425,7 +425,7 @@ proc process_operations(cfg: RuntimeConfig,
 
   ok()
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/altair/beacon-chain.md#sync-committee-processing
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/altair/beacon-chain.md#sync-committee-processing
 func get_participant_reward*(total_active_balance: Gwei): Gwei =
   let
     total_active_increments =
@@ -440,7 +440,7 @@ func get_participant_reward*(total_active_balance: Gwei): Gwei =
 func get_proposer_reward*(participant_reward: Gwei): Gwei =
   participant_reward * PROPOSER_WEIGHT div (WEIGHT_DENOMINATOR - PROPOSER_WEIGHT)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/altair/beacon-chain.md#sync-committee-processing
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/altair/beacon-chain.md#sync-committee-processing
 proc process_sync_aggregate*(
     state: var (altair.BeaconState | bellatrix.BeaconState),
     sync_aggregate: SomeSyncAggregate, total_active_balance: Gwei,
@@ -538,7 +538,7 @@ proc process_execution_payload*(
 
   ok()
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#block-processing
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#block-processing
 # TODO workaround for https://github.com/nim-lang/Nim/issues/18095
 # copy of datatypes/phase0.nim
 type SomePhase0Block =
@@ -570,7 +570,7 @@ proc process_block*(
     cache: var StateCache): Result[void, cstring] =
   err("process_block: Merge state with Phase 0 block")
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/altair/beacon-chain.md#block-processing
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/altair/beacon-chain.md#block-processing
 # TODO workaround for https://github.com/nim-lang/Nim/issues/18095
 # copy of datatypes/altair.nim
 type SomeAltairBlock =
diff --git a/beacon_chain/spec/state_transition_epoch.nim b/beacon_chain/spec/state_transition_epoch.nim
index 1380791dc..a91f05add 100644
--- a/beacon_chain/spec/state_transition_epoch.nim
+++ b/beacon_chain/spec/state_transition_epoch.nim
@@ -6,8 +6,8 @@
 # at your option. This file may not be copied, modified, or distributed except according to those terms.
 
 # State transition - epoch processing, as described in
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#epoch-processing and
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/altair/beacon-chain.md#epoch-processing
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#epoch-processing and
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/altair/beacon-chain.md#epoch-processing
 #
 # The entry point is `process_epoch`, which is at the bottom of this file.
 #
@@ -35,7 +35,7 @@ export extras, phase0, altair
 logScope: topics = "consens"
 
 # Accessors that implement the max condition in `get_total_balance`:
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#get_total_balance
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#get_total_balance
 template current_epoch*(v: TotalBalances): Gwei =
   max(EFFECTIVE_BALANCE_INCREMENT, v.current_epoch_raw)
 template previous_epoch*(v: TotalBalances): Gwei =
@@ -167,8 +167,8 @@ func is_eligible_validator*(validator: ParticipationInfo): bool =
 # Spec
 # --------------------------------------------------------
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/altair/beacon-chain.md#get_unslashed_participating_indices
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#get_total_balance
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/altair/beacon-chain.md#get_unslashed_participating_indices
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#get_total_balance
 func get_unslashed_participating_balances*(state: altair.BeaconState | bellatrix.BeaconState):
     UnslashedParticipatingBalances =
   let
@@ -256,7 +256,7 @@ proc process_justification_and_finalization*(state: var phase0.BeaconState,
   ## state.justification_bits[1:] = state.justification_bits[:-1]
   ## state.justification_bits[0] = 0b0
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#misc
+  # https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#misc
   const JUSTIFICATION_BITS_LENGTH = 4
 
   state.justification_bits = JustificationBits(
@@ -332,8 +332,8 @@ proc process_justification_and_finalization*(state: var phase0.BeaconState,
       current_epoch = current_epoch,
       checkpoint = shortLog(state.finalized_checkpoint)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/altair/beacon-chain.md#justification-and-finalization
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#justification-and-finalization
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/altair/beacon-chain.md#justification-and-finalization
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#justification-and-finalization
 # TODO merge these things -- effectively, the phase0 process_justification_and_finalization is mostly a stub in this world
 proc weigh_justification_and_finalization(state: var (altair.BeaconState | bellatrix.BeaconState),
                                           total_active_balance: Gwei,
@@ -353,7 +353,7 @@ proc weigh_justification_and_finalization(state: var (altair.BeaconState | bella
   ## state.justification_bits[1:] = state.justification_bits[:-1]
   ## state.justification_bits[0] = 0b0
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#misc
+  # https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#misc
   const JUSTIFICATION_BITS_LENGTH = 4
 
   state.justification_bits = JustificationBits(
@@ -447,7 +447,7 @@ proc process_justification_and_finalization*(state: var (altair.BeaconState | be
     balances.previous_epoch[TIMELY_TARGET_FLAG_INDEX],
     balances.current_epoch_TIMELY_TARGET, flags)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#helpers
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#helpers
 func get_base_reward_sqrt*(state: phase0.BeaconState, index: ValidatorIndex,
     total_balance_sqrt: auto): Gwei =
   # Spec function recalculates total_balance every time, which creates an
@@ -573,7 +573,7 @@ func get_inactivity_penalty_delta*(validator: RewardStatus,
 
   delta
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#get_attestation_deltas
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#get_attestation_deltas
 func get_attestation_deltas(state: phase0.BeaconState, info: var phase0.EpochInfo) =
   ## Update rewards with attestation reward/penalty deltas for each validator.
 
@@ -617,7 +617,7 @@ func get_attestation_deltas(state: phase0.BeaconState, info: var phase0.EpochInf
         info.validators[proposer_index].delta.add(
           proposer_delta.get()[1])
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/altair/beacon-chain.md#get_base_reward
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/altair/beacon-chain.md#get_base_reward
 func get_base_reward_increment*(
     state: altair.BeaconState | bellatrix.BeaconState, index: ValidatorIndex,
     base_reward_per_increment: Gwei): Gwei =
@@ -627,7 +627,7 @@ func get_base_reward_increment*(
     state.validators[index].effective_balance div EFFECTIVE_BALANCE_INCREMENT
   increments * base_reward_per_increment
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/altair/beacon-chain.md#get_flag_index_deltas
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/altair/beacon-chain.md#get_flag_index_deltas
 func get_flag_index_reward*(state: altair.BeaconState | bellatrix.BeaconState,
                             base_reward: Gwei, active_increments: Gwei,
                             unslashed_participating_increments: Gwei,
@@ -639,16 +639,16 @@ func get_flag_index_reward*(state: altair.BeaconState | bellatrix.BeaconState,
   else:
     0.Gwei
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/altair/beacon-chain.md#get_flag_index_deltas
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/altair/beacon-chain.md#get_flag_index_deltas
 func get_unslashed_participating_increment*(
     info: altair.EpochInfo, flag_index: int): Gwei =
   info.balances.previous_epoch[flag_index] div EFFECTIVE_BALANCE_INCREMENT
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/altair/beacon-chain.md#get_flag_index_deltas
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/altair/beacon-chain.md#get_flag_index_deltas
 func get_active_increments*(info: altair.EpochInfo): Gwei =
   info.balances.current_epoch div EFFECTIVE_BALANCE_INCREMENT
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/altair/beacon-chain.md#get_flag_index_deltas
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/altair/beacon-chain.md#get_flag_index_deltas
 iterator get_flag_index_deltas*(
     state: altair.BeaconState | bellatrix.BeaconState, flag_index: int,
     base_reward_per_increment: Gwei,
@@ -694,7 +694,7 @@ iterator get_flag_index_deltas*(
       else:
         (vidx, RewardDelta(rewards: 0.Gwei, penalties: 0.Gwei))
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/altair/beacon-chain.md#modified-get_inactivity_penalty_deltas
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/altair/beacon-chain.md#modified-get_inactivity_penalty_deltas
 iterator get_inactivity_penalty_deltas*(
     cfg: RuntimeConfig, state: altair.BeaconState, info: altair.EpochInfo):
     (ValidatorIndex, Gwei) =
@@ -741,7 +741,7 @@ iterator get_inactivity_penalty_deltas*(
           state.inactivity_scores[index]
       yield (vidx, Gwei(penalty_numerator div penalty_denominator))
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#rewards-and-penalties-1
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#rewards-and-penalties-1
 func process_rewards_and_penalties(
     state: var phase0.BeaconState, info: var phase0.EpochInfo) =
   # No rewards are applied at the end of `GENESIS_EPOCH` because rewards are
@@ -764,7 +764,7 @@ func process_rewards_and_penalties(
     decrease_balance(balance, v.delta.penalties)
     state.balances.asSeq()[idx] = balance
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/altair/beacon-chain.md#rewards-and-penalties
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/altair/beacon-chain.md#rewards-and-penalties
 func process_rewards_and_penalties(
     cfg: RuntimeConfig, state: var (altair.BeaconState | bellatrix.BeaconState),
     info: var altair.EpochInfo)
@@ -799,7 +799,7 @@ func process_rewards_and_penalties(
     decrease_balance(balance, info.validators[index].delta.penalties)
     state.balances.asSeq()[index] = balance
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#registry-updates
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#registry-updates
 func process_registry_updates*(
     cfg: RuntimeConfig, state: var ForkyBeaconState, cache: var StateCache) =
   ## Process activation eligibility and ejections
@@ -849,8 +849,8 @@ func process_registry_updates*(
     state.validators[index].activation_epoch =
       compute_activation_exit_epoch(get_current_epoch(state))
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#slashings
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/altair/beacon-chain.md#slashings
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#slashings
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/altair/beacon-chain.md#slashings
 # https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/bellatrix/beacon-chain.md#slashings
 func get_adjusted_total_slashing_balance*(
     state: ForkyBeaconState, total_balance: Gwei): Gwei =
@@ -867,15 +867,15 @@ func get_adjusted_total_slashing_balance*(
       {.fatal: "process_slashings: incorrect BeaconState type".}
   min(sum(state.slashings.data) * multiplier, total_balance)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#slashings
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/altair/beacon-chain.md#slashings
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#slashings
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/altair/beacon-chain.md#slashings
 # https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/bellatrix/beacon-chain.md#slashings
 func slashing_penalty_applies*(validator: Validator, epoch: Epoch): bool =
   validator.slashed and
   epoch + EPOCHS_PER_SLASHINGS_VECTOR div 2 == validator.withdrawable_epoch
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#slashings
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/altair/beacon-chain.md#slashings
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#slashings
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/altair/beacon-chain.md#slashings
 # https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/bellatrix/beacon-chain.md#slashings
 func get_slashing_penalty*(validator: Validator,
                           adjusted_total_slashing_balance,
@@ -886,8 +886,8 @@ func get_slashing_penalty*(validator: Validator,
                           adjusted_total_slashing_balance
   penalty_numerator div total_balance * increment
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#slashings
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/altair/beacon-chain.md#slashings
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#slashings
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/altair/beacon-chain.md#slashings
 # https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/bellatrix/beacon-chain.md#slashings
 func process_slashings*(state: var ForkyBeaconState, total_balance: Gwei) =
   let
@@ -902,7 +902,7 @@ func process_slashings*(state: var ForkyBeaconState, total_balance: Gwei) =
         adjusted_total_slashing_balance, total_balance)
       decrease_balance(state, index.ValidatorIndex, penalty)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#eth1-data-votes-updates
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#eth1-data-votes-updates
 func process_eth1_data_reset*(state: var ForkyBeaconState) =
   let next_epoch = get_current_epoch(state) + 1
 
@@ -910,7 +910,7 @@ func process_eth1_data_reset*(state: var ForkyBeaconState) =
   if next_epoch mod EPOCHS_PER_ETH1_VOTING_PERIOD == 0:
     state.eth1_data_votes = default(type state.eth1_data_votes)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#effective-balances-updates
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#effective-balances-updates
 func process_effective_balance_updates*(state: var ForkyBeaconState) =
   # Update effective balances with hysteresis
   for index in 0..<state.validators.len:
@@ -932,14 +932,14 @@ func process_effective_balance_updates*(state: var ForkyBeaconState) =
       if new_effective_balance != effective_balance:
         state.validators[index].effective_balance = new_effective_balance
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#slashings-balances-updates
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#slashings-balances-updates
 func process_slashings_reset*(state: var ForkyBeaconState) =
   let next_epoch = get_current_epoch(state) + 1
 
   # Reset slashings
   state.slashings[int(next_epoch mod EPOCHS_PER_SLASHINGS_VECTOR)] = 0.Gwei
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#randao-mixes-updates
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#randao-mixes-updates
 func process_randao_mixes_reset*(state: var ForkyBeaconState) =
   let
     current_epoch = get_current_epoch(state)
@@ -949,7 +949,7 @@ func process_randao_mixes_reset*(state: var ForkyBeaconState) =
   state.randao_mixes[next_epoch mod EPOCHS_PER_HISTORICAL_VECTOR] =
     get_randao_mix(state, current_epoch)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#historical-roots-updates
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#historical-roots-updates
 func process_historical_roots_update*(state: var ForkyBeaconState) =
   ## Set historical root accumulator
   let next_epoch = get_current_epoch(state) + 1
@@ -957,20 +957,20 @@ func process_historical_roots_update*(state: var ForkyBeaconState) =
   if next_epoch mod (SLOTS_PER_HISTORICAL_ROOT div SLOTS_PER_EPOCH) == 0:
     # Equivalent to hash_tree_root(foo: HistoricalBatch), but without using
     # significant additional stack or heap.
-    # https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#historicalbatch
+    # https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#historicalbatch
     # In response to https://github.com/status-im/nimbus-eth2/issues/921
     if not state.historical_roots.add hash_tree_root(
         [hash_tree_root(state.block_roots), hash_tree_root(state.state_roots)]):
       raiseAssert "no more room for historical roots, so long and thanks for the fish!"
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#participation-records-rotation
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#participation-records-rotation
 func process_participation_record_updates*(state: var phase0.BeaconState) =
   # Rotate current/previous epoch attestations - using swap avoids copying all
   # elements using a slow genericSeqAssign
   state.previous_epoch_attestations.clear()
   swap(state.previous_epoch_attestations, state.current_epoch_attestations)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/altair/beacon-chain.md#participation-flags-updates
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/altair/beacon-chain.md#participation-flags-updates
 func process_participation_flag_updates*(state: var (altair.BeaconState | bellatrix.BeaconState)) =
   state.previous_epoch_participation = state.current_epoch_participation
 
@@ -984,14 +984,14 @@ func process_participation_flag_updates*(state: var (altair.BeaconState | bellat
 
   state.current_epoch_participation.resetCache()
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/altair/beacon-chain.md#sync-committee-updates
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/altair/beacon-chain.md#sync-committee-updates
 proc process_sync_committee_updates*(state: var (altair.BeaconState | bellatrix.BeaconState)) =
   let next_epoch = get_current_epoch(state) + 1
   if next_epoch.is_sync_committee_period():
     state.current_sync_committee = state.next_sync_committee
     state.next_sync_committee = get_next_sync_committee(state)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/altair/beacon-chain.md#inactivity-scores
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/altair/beacon-chain.md#inactivity-scores
 func process_inactivity_updates*(
     cfg: RuntimeConfig, state: var (altair.BeaconState | bellatrix.BeaconState),
     info: altair.EpochInfo) =
@@ -1026,7 +1026,7 @@ func process_inactivity_updates*(
     if pre_inactivity_score != inactivity_score:
       state.inactivity_scores[index] = inactivity_score
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#epoch-processing
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#epoch-processing
 proc process_epoch*(
     cfg: RuntimeConfig, state: var phase0.BeaconState, flags: UpdateFlags,
     cache: var StateCache, info: var phase0.EpochInfo) =
@@ -1079,7 +1079,7 @@ func init*(
     T: type altair.EpochInfo, state: altair.BeaconState | bellatrix.BeaconState): T =
   init(result, state)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/altair/beacon-chain.md#epoch-processing
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/altair/beacon-chain.md#epoch-processing
 proc process_epoch*(
     cfg: RuntimeConfig, state: var (altair.BeaconState | bellatrix.BeaconState),
     flags: UpdateFlags, cache: var StateCache, info: var altair.EpochInfo)
@@ -1090,7 +1090,7 @@ proc process_epoch*(
 
   info.init(state)
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#justification-and-finalization
+  # https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#justification-and-finalization
   process_justification_and_finalization(state, info.balances, flags)
 
   # state.slot hasn't been incremented yet.
@@ -1108,7 +1108,7 @@ proc process_epoch*(
   # https://github.com/ethereum/consensus-specs/blob/v1.1.1/specs/phase0/beacon-chain.md#rewards-and-penalties-1
   process_rewards_and_penalties(cfg, state, info)
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#registry-updates
+  # https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#registry-updates
   process_registry_updates(cfg, state, cache)
 
   # https://github.com/ethereum/consensus-specs/blob/v1.0.1/specs/phase0/beacon-chain.md#slashings
diff --git a/beacon_chain/spec/validator.nim b/beacon_chain/spec/validator.nim
index 80e964342..90125ddd0 100644
--- a/beacon_chain/spec/validator.nim
+++ b/beacon_chain/spec/validator.nim
@@ -22,8 +22,8 @@ const
   PIVOT_VIEW_SIZE = SEED_SIZE + ROUND_SIZE
   TOTAL_SIZE = PIVOT_VIEW_SIZE + POSITION_WINDOW_SIZE
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#compute_shuffled_index
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#compute_committee
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#compute_shuffled_index
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#compute_committee
 # Port of https://github.com/protolambda/zrnt/blob/master/eth2/beacon/shuffle.go
 # Shuffles or unshuffles, depending on the `dir` (true for shuffling, false for unshuffling
 func shuffle_list*(input: var seq[ValidatorIndex], seed: Eth2Digest) =
@@ -153,13 +153,13 @@ func get_shuffled_active_validator_indices*(
   withState(state):
     cache.get_shuffled_active_validator_indices(state.data, epoch)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#get_active_validator_indices
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#get_active_validator_indices
 func count_active_validators*(state: ForkyBeaconState,
                               epoch: Epoch,
                               cache: var StateCache): uint64 =
   cache.get_shuffled_active_validator_indices(state, epoch).lenu64
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#get_committee_count_per_slot
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#get_committee_count_per_slot
 func get_committee_count_per_slot*(num_active_validators: uint64): uint64 =
   clamp(
     num_active_validators div SLOTS_PER_EPOCH div TARGET_COMMITTEE_SIZE,
@@ -189,12 +189,12 @@ func get_previous_epoch*(state: ForkyBeaconState): Epoch =
   # Return the previous epoch (unless the current epoch is ``GENESIS_EPOCH``).
   get_previous_epoch(get_current_epoch(state))
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#get_previous_epoch
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#get_previous_epoch
 func get_previous_epoch*(state: ForkedHashedBeaconState): Epoch =
   ## Return the previous epoch (unless the current epoch is ``GENESIS_EPOCH``).
   get_previous_epoch(get_current_epoch(state))
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#compute_committee
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#compute_committee
 func compute_committee_slice*(
     active_validators, index, count: uint64): Slice[int] =
   doAssert active_validators <= ValidatorIndex.high.uint64
@@ -240,7 +240,7 @@ func compute_committee_len*(
 
   (slice.b - slice.a + 1).uint64
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#get_beacon_committee
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#get_beacon_committee
 iterator get_beacon_committee*(
     state: ForkyBeaconState, slot: Slot, index: CommitteeIndex,
     cache: var StateCache): (int, ValidatorIndex) =
@@ -280,7 +280,7 @@ func get_beacon_committee*(
   withState(state):
     get_beacon_committee(state.data, slot, index, cache)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#get_beacon_committee
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#get_beacon_committee
 func get_beacon_committee_len*(
     state: ForkyBeaconState, slot: Slot, index: CommitteeIndex,
     cache: var StateCache): uint64 =
@@ -303,7 +303,7 @@ func get_beacon_committee_len*(
   withState(state):
     get_beacon_committee_len(state.data, slot, index, cache)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#compute_shuffled_index
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#compute_shuffled_index
 func compute_shuffled_index*(
     index: uint64, index_count: uint64, seed: Eth2Digest): uint64 =
   ## Return the shuffled index corresponding to ``seed`` (and ``index_count``).
@@ -338,7 +338,7 @@ func compute_shuffled_index*(
 
   cur_idx_permuted
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#compute_proposer_index
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#compute_proposer_index
 func compute_proposer_index(state: ForkyBeaconState,
     indices: seq[ValidatorIndex], seed: Eth2Digest): Option[ValidatorIndex] =
   ## Return from ``indices`` a random index sampled by effective balance.
@@ -365,7 +365,7 @@ func compute_proposer_index(state: ForkyBeaconState,
       return some(candidate_index)
     i += 1
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#get_beacon_proposer_index
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#get_beacon_proposer_index
 func get_beacon_proposer_index*(
     state: ForkyBeaconState, cache: var StateCache, slot: Slot):
     Option[ValidatorIndex] =
@@ -403,7 +403,7 @@ func get_beacon_proposer_index*(
 
     return res
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#get_beacon_proposer_index
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#get_beacon_proposer_index
 func get_beacon_proposer_index*(state: ForkyBeaconState, cache: var StateCache):
     Option[ValidatorIndex] =
   get_beacon_proposer_index(state, cache, state.slot)
diff --git a/beacon_chain/validators/validator_pool.nim b/beacon_chain/validators/validator_pool.nim
index e05172f71..0180edd56 100644
--- a/beacon_chain/validators/validator_pool.nim
+++ b/beacon_chain/validators/validator_pool.nim
@@ -304,7 +304,7 @@ proc signAggregateAndProof*(v: AttachedValidator,
       else:
         SignatureResult.ok(res.get().toValidatorSig())
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/altair/validator.md#prepare-sync-committee-message
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/altair/validator.md#prepare-sync-committee-message
 proc signSyncCommitteeMessage*(v: AttachedValidator,
                                fork: Fork,
                                genesis_validators_root: Eth2Digest,
@@ -334,7 +334,7 @@ proc signSyncCommitteeMessage*(v: AttachedValidator,
       )
     )
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/altair/validator.md#aggregation-selection
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/altair/validator.md#aggregation-selection
 proc getSyncCommitteeSelectionProof*(v: AttachedValidator,
                                      fork: Fork,
                                      genesis_validators_root: Eth2Digest,
@@ -355,7 +355,7 @@ proc getSyncCommitteeSelectionProof*(v: AttachedValidator,
       else:
         SignatureResult.ok(res.get().toValidatorSig())
 
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/altair/validator.md#signature
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/altair/validator.md#signature
 proc sign*(v: AttachedValidator, msg: ref SignedContributionAndProof,
            fork: Fork, genesis_validators_root: Eth2Digest
           ): Future[SignatureResult] {.async.} =
diff --git a/docs/attestation_flow.md b/docs/attestation_flow.md
index 856e3fd73..5cbb6900d 100644
--- a/docs/attestation_flow.md
+++ b/docs/attestation_flow.md
@@ -9,7 +9,7 @@ It is important to distinguish attestation `validation` from attestation `verifi
   - Aggregated: https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/p2p-interface.md#beacon_aggregate_and_proof
   - Unaggregated: https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/p2p-interface.md#beacon_attestation_subnet_id
 - Attestation `verification` is defined in the consensus specs. Verified attestations can affect fork choice and may be included in a block.
-  - https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#attestations
+  - https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#attestations
 
 From the specs it seems like gossip attestation `validation` is a superset of consensus attestation `verification`.
 
diff --git a/docs/block_flow.md b/docs/block_flow.md
index 4a146c997..9d0bf4a04 100644
--- a/docs/block_flow.md
+++ b/docs/block_flow.md
@@ -9,7 +9,7 @@ Important distinction:
   https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/p2p-interface.md#beacon_block.
   A validated block can be forwarded on gossipsub.
 - and we distinguish `verification` which is defined in consensus specs:
-  https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#block-processing
+  https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#block-processing
   A block needs to be verified to enter fork choice, the DAG and the BeaconChainDB
 
 In particular in terms of costly checks validating a block only requires checking:
diff --git a/ncli/ncli_common.nim b/ncli/ncli_common.nim
index ca4865632..725188c83 100644
--- a/ncli/ncli_common.nim
+++ b/ncli/ncli_common.nim
@@ -124,7 +124,7 @@ proc getFinalizedCheckpoint(state: ForkyBeaconState,
     old_previous_justified_checkpoint = state.previous_justified_checkpoint
     old_current_justified_checkpoint = state.current_justified_checkpoint
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#misc
+  # https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#misc
   const JUSTIFICATION_BITS_LENGTH = 4
 
   var justification_bits = JustificationBits(
diff --git a/tests/spec_block_processing/test_process_deposits.nim b/tests/spec_block_processing/test_process_deposits.nim
index 23d5570de..1469470e0 100644
--- a/tests/spec_block_processing/test_process_deposits.nim
+++ b/tests/spec_block_processing/test_process_deposits.nim
@@ -1,5 +1,5 @@
 # beacon_chain
-# Copyright (c) 2018-2021 Status Research & Development GmbH
+# Copyright (c) 2018-2022 Status Research & Development GmbH
 # Licensed and distributed under either of
 #   * MIT license (license terms in the root directory or at https://opensource.org/licenses/MIT).
 #   * Apache v2 license (license terms in the root directory or at https://www.apache.org/licenses/LICENSE-2.0).
@@ -7,7 +7,7 @@
 
 
 # process_deposit (beaconstate.nim)
-# https://github.com/ethereum/consensus-specs/blob/v1.1.8/specs/phase0/beacon-chain.md#deposits
+# https://github.com/ethereum/consensus-specs/blob/v1.1.9/specs/phase0/beacon-chain.md#deposits
 # ---------------------------------------------------------------
 
 {.used.}