diff --git a/beacon_chain/consensus_object_pools/spec_cache.nim b/beacon_chain/consensus_object_pools/spec_cache.nim
index 2f071d641..60a770dc6 100644
--- a/beacon_chain/consensus_object_pools/spec_cache.nim
+++ b/beacon_chain/consensus_object_pools/spec_cache.nim
@@ -181,7 +181,7 @@ func makeAttestationData*(
 
   doAssert current_epoch == epochRef.epoch
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0/specs/phase0/validator.md#attestation-data
+  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/phase0/validator.md#attestation-data
   AttestationData(
     slot: slot,
     index: committee_index.asUInt64,
@@ -191,7 +191,7 @@ func makeAttestationData*(
       epoch: current_epoch,
       root: epoch_boundary_block.blck.root))
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0/specs/phase0/validator.md#validator-assignments
+# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/phase0/validator.md#validator-assignments
 iterator get_committee_assignments*(
     shufflingRef: ShufflingRef, validator_indices: HashSet[ValidatorIndex]):
     tuple[committee_index: CommitteeIndex,
diff --git a/beacon_chain/gossip_processing/README.md b/beacon_chain/gossip_processing/README.md
index e084147e5..5c05470eb 100644
--- a/beacon_chain/gossip_processing/README.md
+++ b/beacon_chain/gossip_processing/README.md
@@ -11,8 +11,8 @@ Gossip validation is different from consensus verification in particular for blo
 
 - Blocks: https://github.com/ethereum/consensus-specs/blob/v1.3.0/specs/phase0/p2p-interface.md#beacon_block
 - Attestations (aggregated): https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/phase0/p2p-interface.md#beacon_aggregate_and_proof
-- Attestations (unaggregated): https://github.com/ethereum/consensus-specs/blob/v1.3.0/specs/phase0/p2p-interface.md#attestation-subnets
-- Voluntary exits: https://github.com/ethereum/consensus-specs/blob/v1.4.0-alpha.3/specs/phase0/p2p-interface.md#voluntary_exit
+- Attestations (unaggregated): https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/phase0/p2p-interface.md#attestation-subnets
+- Voluntary exits: https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/phase0/p2p-interface.md#voluntary_exit
 - Proposer slashings: https://github.com/ethereum/consensus-specs/blob/v1.4.0-alpha.3/specs/phase0/p2p-interface.md#proposer_slashing
 - Attester slashing: https://github.com/ethereum/consensus-specs/blob/v1.4.0-alpha.3/specs/phase0/p2p-interface.md#attester_slashing
 
diff --git a/beacon_chain/libnimbus_lc/libnimbus_lc.h b/beacon_chain/libnimbus_lc/libnimbus_lc.h
index 8167ef312..dab050c64 100644
--- a/beacon_chain/libnimbus_lc/libnimbus_lc.h
+++ b/beacon_chain/libnimbus_lc/libnimbus_lc.h
@@ -149,7 +149,7 @@ typedef struct ETHBeaconState ETHBeaconState;
  *         representation - If successful.
  * @return `NULL` - If the given `sszBytes` is malformed.
  *
- * @see https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.0/specs/phase0/beacon-chain.md#beaconstate
+ * @see https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/phase0/beacon-chain.md#beaconstate
  * @see https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.0/specs/altair/beacon-chain.md#beaconstate
  * @see https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.0/specs/bellatrix/beacon-chain.md#beaconstate
  * @see https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.0/specs/capella/beacon-chain.md#beaconstate
@@ -322,7 +322,7 @@ typedef struct ETHLightClientStore ETHLightClientStore;
  *
  * @see https://ethereum.github.io/beacon-APIs/?urls.primaryName=v2.4.1#/Beacon/getLightClientBootstrap
  * @see https://ethereum.github.io/beacon-APIs/?urls.primaryName=v2.4.1#/Events/eventstream
- * @see https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.0/specs/altair/light-client/light-client.md
+ * @see https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/altair/light-client/light-client.md
  * @see https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.0/specs/phase0/weak-subjectivity.md#weak-subjectivity-period
  */
 ETH_RESULT_USE_CHECK
diff --git a/beacon_chain/networking/eth2_network.nim b/beacon_chain/networking/eth2_network.nim
index 3c50f2c64..6b9a498cd 100644
--- a/beacon_chain/networking/eth2_network.nim
+++ b/beacon_chain/networking/eth2_network.nim
@@ -171,7 +171,7 @@ type
   MounterProc* = proc(network: Eth2Node) {.gcsafe, raises: [CatchableError].}
   MessageContentPrinter* = proc(msg: pointer): string {.gcsafe, raises: [].}
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-alpha.3/specs/phase0/p2p-interface.md#goodbye
+  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/phase0/p2p-interface.md#goodbye
   DisconnectionReason* = enum
     # might see other values on the wire!
     ClientShutDown = 1
@@ -2550,7 +2550,7 @@ proc unsubscribeAttestationSubnets*(
       node.unsubscribe(getAttestationTopic(forkDigest, SubnetId(subnet_id)))
 
 proc updateStabilitySubnetMetadata*(node: Eth2Node, attnets: AttnetBits) =
-  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-alpha.3/specs/phase0/p2p-interface.md#metadata
+  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/phase0/p2p-interface.md#metadata
   if node.metadata.attnets == attnets:
     return
 
diff --git a/beacon_chain/nimbus_beacon_node.nim b/beacon_chain/nimbus_beacon_node.nim
index c5e685706..0a0bc43e4 100644
--- a/beacon_chain/nimbus_beacon_node.nim
+++ b/beacon_chain/nimbus_beacon_node.nim
@@ -1460,7 +1460,7 @@ proc installMessageValidators(node: BeaconNode) =
                 MsgSource.gossip, signedBlock)))
 
       # beacon_attestation_{subnet_id}
-      # https://github.com/ethereum/consensus-specs/blob/v1.3.0/specs/phase0/p2p-interface.md#beacon_attestation_subnet_id
+      # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/phase0/p2p-interface.md#beacon_attestation_subnet_id
       for it in SubnetId:
         closureScope:  # Needed for inner `proc`; don't lift it out of loop.
           let subnet_id = it
diff --git a/beacon_chain/spec/beaconstate.nim b/beacon_chain/spec/beaconstate.nim
index 1e12baac7..ef692e793 100644
--- a/beacon_chain/spec/beaconstate.nim
+++ b/beacon_chain/spec/beaconstate.nim
@@ -66,7 +66,7 @@ func get_validator_from_deposit*(deposit: DepositData):
     effective_balance: effective_balance
   )
 
-# https://github.com/ethereum/consensus-specs/blob/v1.4.0-alpha.3/specs/phase0/beacon-chain.md#compute_activation_exit_epoch
+# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/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.
@@ -158,7 +158,7 @@ func get_whistleblower_reward*(validator_effective_balance: Gwei): Gwei =
 
 # https://github.com/ethereum/consensus-specs/blob/v1.4.0-alpha.3/specs/phase0/beacon-chain.md#slash_validator
 # https://github.com/ethereum/consensus-specs/blob/v1.3.0/specs/altair/beacon-chain.md#modified-slash_validator
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0/specs/bellatrix/beacon-chain.md#modified-slash_validator
+# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/bellatrix/beacon-chain.md#modified-slash_validator
 func get_proposer_reward(state: ForkyBeaconState, whistleblower_reward: Gwei): Gwei =
   when state is phase0.BeaconState:
     whistleblower_reward div PROPOSER_REWARD_QUOTIENT
@@ -536,7 +536,7 @@ func get_attestation_participation_flag_indices(
 
   participation_flag_indices
 
-# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.0/specs/deneb/beacon-chain.md#modified-get_attestation_participation_flag_indices
+# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/deneb/beacon-chain.md#modified-get_attestation_participation_flag_indices
 func get_attestation_participation_flag_indices(
     state: deneb.BeaconState,
     data: AttestationData, inclusion_delay: uint64): set[TimelyFlag] =
diff --git a/beacon_chain/spec/datatypes/altair.nim b/beacon_chain/spec/datatypes/altair.nim
index 6048d2d81..ef5365c1b 100644
--- a/beacon_chain/spec/datatypes/altair.nim
+++ b/beacon_chain/spec/datatypes/altair.nim
@@ -481,7 +481,7 @@ type
     # [New in Altair]
     sync_aggregate*: TrustedSyncAggregate
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-alpha.3/specs/phase0/beacon-chain.md#signedbeaconblock
+  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/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 d30ff9330..6ac189a21 100644
--- a/beacon_chain/spec/datatypes/base.nim
+++ b/beacon_chain/spec/datatypes/base.nim
@@ -252,7 +252,7 @@ type
     current_version*: Version
     genesis_validators_root*: Eth2Digest
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-alpha.3/specs/phase0/beacon-chain.md#checkpoint
+  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/phase0/beacon-chain.md#checkpoint
   Checkpoint* = object
     epoch*: Epoch
     root*: Eth2Digest
@@ -380,7 +380,7 @@ type
     message*: VoluntaryExit
     signature*: TrustedSig
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-alpha.3/specs/phase0/beacon-chain.md#beaconblockheader
+  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/phase0/beacon-chain.md#beaconblockheader
   BeaconBlockHeader* = object
     slot*: Slot
     proposer_index*: uint64 # `ValidatorIndex` after validation
@@ -433,7 +433,7 @@ type
     branch*: array[DEPOSIT_CONTRACT_TREE_DEPTH, Eth2Digest]
     deposit_count*: array[32, byte] # Uint256
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-alpha.3/specs/phase0/beacon-chain.md#validator
+  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/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
     withdrawable_epoch*: Epoch
       ## When validator can withdraw funds
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0/specs/phase0/p2p-interface.md#eth2-field
+  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/phase0/p2p-interface.md#eth2-field
   ENRForkID* = object
     fork_digest*: ForkDigest
     next_fork_version*: Version
diff --git a/beacon_chain/spec/datatypes/capella.nim b/beacon_chain/spec/datatypes/capella.nim
index cb8a59422..bbba8e382 100644
--- a/beacon_chain/spec/datatypes/capella.nim
+++ b/beacon_chain/spec/datatypes/capella.nim
@@ -299,7 +299,7 @@ type
     data*: BeaconState
     root*: Eth2Digest # hash_tree_root(data)
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-alpha.3/specs/phase0/beacon-chain.md#beaconblock
+  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/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
diff --git a/beacon_chain/spec/datatypes/constants.nim b/beacon_chain/spec/datatypes/constants.nim
index dc00bf11b..299c29812 100644
--- a/beacon_chain/spec/datatypes/constants.nim
+++ b/beacon_chain/spec/datatypes/constants.nim
@@ -54,7 +54,7 @@ const
   # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/capella/beacon-chain.md#domain-types
   DOMAIN_BLS_TO_EXECUTION_CHANGE* = DomainType([byte 0x0a, 0x00, 0x00, 0x00])
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.0/specs/deneb/beacon-chain.md#domain-types
+  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/deneb/beacon-chain.md#domain-types
   DOMAIN_BLOB_SIDECAR* = DomainType([byte 0x0b, 0x00, 0x00, 0x00])
 
   # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/bellatrix/beacon-chain.md#transition-settings
diff --git a/beacon_chain/spec/datatypes/deneb.nim b/beacon_chain/spec/datatypes/deneb.nim
index d2cb90599..44afc8844 100644
--- a/beacon_chain/spec/datatypes/deneb.nim
+++ b/beacon_chain/spec/datatypes/deneb.nim
@@ -33,7 +33,7 @@ const
   # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/deneb/polynomial-commitments.md#constants
   BYTES_PER_FIELD_ELEMENT = 32
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0/specs/deneb/beacon-chain.md#blob
+  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/deneb/beacon-chain.md#blob
   BLOB_TX_TYPE* = 0x03'u8
 
   # https://github.com/ethereum/consensus-specs/blob/v1.3.0/specs/deneb/polynomial-commitments.md#constants
@@ -625,7 +625,7 @@ func is_valid_light_client_header*(
     get_subtree_index(EXECUTION_PAYLOAD_INDEX),
     header.beacon.body_root)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.0/specs/deneb/light-client/fork.md#upgrading-light-client-data
+# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/deneb/light-client/fork.md#upgrading-light-client-data
 func upgrade_lc_header_to_deneb*(
     pre: capella.LightClientHeader): LightClientHeader =
   LightClientHeader(
@@ -680,7 +680,7 @@ func upgrade_lc_finality_update_to_deneb*(
     sync_aggregate: pre.sync_aggregate,
     signature_slot: pre.signature_slot)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.0/specs/deneb/light-client/fork.md#upgrading-light-client-data
+# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/deneb/light-client/fork.md#upgrading-light-client-data
 func upgrade_lc_optimistic_update_to_deneb*(
     pre: capella.LightClientOptimisticUpdate): LightClientOptimisticUpdate =
   LightClientOptimisticUpdate(
diff --git a/beacon_chain/spec/helpers.nim b/beacon_chain/spec/helpers.nim
index a5d99fcfd..84c9a05ad 100644
--- a/beacon_chain/spec/helpers.nim
+++ b/beacon_chain/spec/helpers.nim
@@ -104,7 +104,7 @@ func get_current_epoch*(state: ForkyBeaconState): Epoch =
   ## Return the current epoch.
   state.slot.epoch
 
-# https://github.com/ethereum/consensus-specs/blob/v1.4.0-alpha.3/specs/phase0/beacon-chain.md#get_current_epoch
+# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/phase0/beacon-chain.md#get_current_epoch
 func get_current_epoch*(state: ForkedHashedBeaconState): Epoch =
   ## Return the current epoch.
   withState(state): get_current_epoch(forkyState.data)
diff --git a/beacon_chain/spec/state_transition.nim b/beacon_chain/spec/state_transition.nim
index 7be206c92..9cfce7e1f 100644
--- a/beacon_chain/spec/state_transition.nim
+++ b/beacon_chain/spec/state_transition.nim
@@ -539,7 +539,7 @@ proc makeBeaconBlock*(
           forkyState.data.latest_execution_payload_header.transactions_root =
             transactions_root.get
 
-          # https://github.com/ethereum/consensus-specs/blob/v1.3.0/specs/capella/beacon-chain.md#beaconblockbody
+          # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/capella/beacon-chain.md#beaconblockbody
           # Effectively hash_tree_root(ExecutionPayload) with the beacon block
           # body, with the execution payload replaced by the execution payload
           # header. htr(payload) == htr(payload header), so substitute.
diff --git a/beacon_chain/spec/state_transition_block.nim b/beacon_chain/spec/state_transition_block.nim
index 5c7b2218b..51c6c3854 100644
--- a/beacon_chain/spec/state_transition_block.nim
+++ b/beacon_chain/spec/state_transition_block.nim
@@ -133,7 +133,7 @@ func is_slashable_validator(validator: Validator, epoch: Epoch): bool =
     (validator.activation_epoch <= epoch) and
     (epoch < validator.withdrawable_epoch)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.4.0-alpha.3/specs/phase0/beacon-chain.md#proposer-slashings
+# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/phase0/beacon-chain.md#proposer-slashings
 proc check_proposer_slashing*(
     state: ForkyBeaconState, proposer_slashing: SomeProposerSlashing,
     flags: UpdateFlags):
@@ -747,7 +747,7 @@ func tx_peek_blob_versioned_hashes(opaque_tx: Transaction):
 # https://github.com/ethereum/consensus-specs/blob/v1.4.0-alpha.1/specs/deneb/beacon-chain.md#kzg_commitment_to_versioned_hash
 func kzg_commitment_to_versioned_hash*(
     kzg_commitment: KzgCommitment): VersionedHash =
-  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-alpha.1/specs/deneb/beacon-chain.md#blob
+  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/deneb/beacon-chain.md#blob
   const VERSIONED_HASH_VERSION_KZG = 0x01'u8
 
   var res: VersionedHash
diff --git a/beacon_chain/spec/state_transition_epoch.nim b/beacon_chain/spec/state_transition_epoch.nim
index 93d602b07..e734f0607 100644
--- a/beacon_chain/spec/state_transition_epoch.nim
+++ b/beacon_chain/spec/state_transition_epoch.nim
@@ -7,7 +7,7 @@
 
 # State transition - epoch processing, as described in
 # https://github.com/ethereum/consensus-specs/blob/v1.4.0-alpha.3/specs/phase0/beacon-chain.md#epoch-processing
-# https://github.com/ethereum/consensus-specs/blob/v1.4.0-alpha.3/specs/altair/beacon-chain.md#epoch-processing
+# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/altair/beacon-chain.md#epoch-processing
 # https://github.com/ethereum/consensus-specs/blob/v1.3.0/specs/bellatrix/beacon-chain.md#epoch-processing
 # https://github.com/ethereum/consensus-specs/blob/v1.3.0/specs/capella/beacon-chain.md#epoch-processing
 #
@@ -710,7 +710,7 @@ iterator get_flag_index_deltas*(
       else:
         (vidx, RewardDelta(rewards: 0.Gwei, penalties: 0.Gwei))
 
-# https://github.com/ethereum/consensus-specs/blob/v1.4.0-alpha.3/specs/altair/beacon-chain.md#modified-get_inactivity_penalty_deltas
+# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/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) =
@@ -888,14 +888,14 @@ func get_adjusted_total_slashing_balance*(
   min(sum(state.slashings.data) * multiplier, total_balance)
 
 # https://github.com/ethereum/consensus-specs/blob/v1.4.0-alpha.3/specs/phase0/beacon-chain.md#slashings
-# https://github.com/ethereum/consensus-specs/blob/v1.4.0-alpha.3/specs/altair/beacon-chain.md#slashings
+# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/altair/beacon-chain.md#slashings
 # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/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/v1.4.0-beta.1/specs/phase0/beacon-chain.md#slashings
-# https://github.com/ethereum/consensus-specs/blob/v1.4.0-alpha.3/specs/altair/beacon-chain.md#slashings
+# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/altair/beacon-chain.md#slashings
 # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/bellatrix/beacon-chain.md#slashings
 func get_slashing_penalty*(validator: Validator,
                           adjusted_total_slashing_balance,
@@ -977,7 +977,7 @@ func compute_historical_root*(state: var ForkyBeaconState): Eth2Digest =
   hash_tree_root([
     hash_tree_root(state.block_roots), hash_tree_root(state.state_roots)])
 
-# https://github.com/ethereum/consensus-specs/blob/v1.4.0-alpha.3/specs/phase0/beacon-chain.md#historical-roots-updates
+# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/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
@@ -1164,7 +1164,7 @@ proc process_epoch*(
   # https://github.com/ethereum/consensus-specs/blob/v1.4.0-alpha.3/specs/phase0/beacon-chain.md#registry-updates
   ? process_registry_updates(cfg, state, cache)
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0/specs/altair/beacon-chain.md#slashings
+  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/altair/beacon-chain.md#slashings
   process_slashings(state, info.balances.current_epoch)  # [Modified in Altair]
 
   process_eth1_data_reset(state)
diff --git a/beacon_chain/statediff.nim b/beacon_chain/statediff.nim
index 667b769d4..456de12f7 100644
--- a/beacon_chain/statediff.nim
+++ b/beacon_chain/statediff.nim
@@ -187,7 +187,7 @@ func getBeaconStateDiffSummary*(state0: capella.BeaconState):
       if state0.eth1_data_votes.len > 0:
         # replaceOrAddEncodeEth1Votes will check whether it needs to replace or add
         # the votes. Which happens is a function of effectively external data, i.e.
-        # https://github.com/ethereum/consensus-specs/blob/v1.4.0-alpha.3/specs/phase0/beacon-chain.md#eth1-data
+        # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/phase0/beacon-chain.md#eth1-data
         # notes it depends on things not deterministic, from a pure consensus-layer
         # perspective. It thus must distinguish between adding and replacing votes,
         # which it accomplishes by checking lengths and the most recent votes. This
diff --git a/beacon_chain/validators/beacon_validators.nim b/beacon_chain/validators/beacon_validators.nim
index 3804acaee..0182e55b8 100644
--- a/beacon_chain/validators/beacon_validators.nim
+++ b/beacon_chain/validators/beacon_validators.nim
@@ -1142,7 +1142,7 @@ proc handleAttestations(node: BeaconNode, head: BlockRef, slot: Slot) =
   # We need to run attestations exactly for the slot that we're attesting to.
   # In case blocks went missing, this means advancing past the latest block
   # using empty slots as fillers.
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0/specs/phase0/validator.md#validator-assignments
+  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/phase0/validator.md#validator-assignments
   let
     epochRef = node.dag.getEpochRef(
       attestationHead.blck, slot.epoch, false).valueOr:
diff --git a/beacon_chain/validators/slashing_protection_v2.nim b/beacon_chain/validators/slashing_protection_v2.nim
index 1bf9ddecf..c6202f88c 100644
--- a/beacon_chain/validators/slashing_protection_v2.nim
+++ b/beacon_chain/validators/slashing_protection_v2.nim
@@ -55,7 +55,7 @@ import
 #   2. An attester can get slashed for signing
 #      two attestations that together violate
 #      the Casper FFG slashing conditions.
-# - https://github.com/ethereum/consensus-specs/blob/v1.3.0/specs/phase0/validator.md#ffg-vote
+# - https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/phase0/validator.md#ffg-vote
 #   The "source" is the current_justified_epoch
 #   The "target" is the current_epoch
 #