diff --git a/beacon_chain/consensus_object_pools/spec_cache.nim b/beacon_chain/consensus_object_pools/spec_cache.nim
index a1f114f76..650d1b898 100644
--- a/beacon_chain/consensus_object_pools/spec_cache.nim
+++ b/beacon_chain/consensus_object_pools/spec_cache.nim
@@ -53,7 +53,7 @@ iterator get_beacon_committee*(
     committees_per_slot * SLOTS_PER_EPOCH
   ): yield (index_in_committee, idx)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.4.0/specs/phase0/beacon-chain.md#get_beacon_committee
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/phase0/beacon-chain.md#get_beacon_committee
 func get_beacon_committee*(
     shufflingRef: ShufflingRef, slot: Slot, committee_index: CommitteeIndex):
     seq[ValidatorIndex] =
diff --git a/beacon_chain/libnimbus_lc/libnimbus_lc.h b/beacon_chain/libnimbus_lc/libnimbus_lc.h
index 7a107e133..397b62ef2 100644
--- a/beacon_chain/libnimbus_lc/libnimbus_lc.h
+++ b/beacon_chain/libnimbus_lc/libnimbus_lc.h
@@ -579,7 +579,7 @@ typedef struct ETHLightClientHeader ETHLightClientHeader;
  *
  * @return Latest finalized header.
  *
- * @see https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.5/specs/capella/light-client/sync-protocol.md#modified-lightclientheader
+ * @see https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/capella/light-client/sync-protocol.md#modified-lightclientheader
  */
 ETH_RESULT_USE_CHECK
 const ETHLightClientHeader *ETHLightClientStoreGetFinalizedHeader(
diff --git a/beacon_chain/networking/eth2_network.nim b/beacon_chain/networking/eth2_network.nim
index f2f5fd81a..a2e08871c 100644
--- a/beacon_chain/networking/eth2_network.nim
+++ b/beacon_chain/networking/eth2_network.nim
@@ -2520,7 +2520,7 @@ proc updateStabilitySubnetMetadata*(node: Eth2Node, attnets: AttnetBits) =
   node.metadata.seq_number += 1
   node.metadata.attnets = attnets
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.5/specs/phase0/p2p-interface.md#attestation-subnet-subscription
+  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/phase0/p2p-interface.md#attestation-subnet-subscription
   # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.4/specs/phase0/p2p-interface.md#attestation-subnet-bitfield
   let res = node.discovery.updateRecord({
     enrAttestationSubnetsField: SSZ.encode(node.metadata.attnets)
diff --git a/beacon_chain/spec/beacon_time.nim b/beacon_chain/spec/beacon_time.nim
index e548d96c7..868620efd 100644
--- a/beacon_chain/spec/beacon_time.nim
+++ b/beacon_chain/spec/beacon_time.nim
@@ -196,7 +196,7 @@ 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/v1.4.0/specs/phase0/beacon-chain.md#compute_start_slot_at_epoch
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/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)
diff --git a/beacon_chain/spec/beaconstate.nim b/beacon_chain/spec/beaconstate.nim
index 8d4801ca9..6a93204fb 100644
--- a/beacon_chain/spec/beaconstate.nim
+++ b/beacon_chain/spec/beaconstate.nim
@@ -67,7 +67,7 @@ func get_validator_from_deposit*(
     effective_balance: effective_balance
   )
 
-# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.0/specs/electra/beacon-chain.md#updated-get_validator_from_deposit
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/electra/beacon-chain.md#updated-get_validator_from_deposit
 func get_validator_from_deposit*(
     state: electra.BeaconState, deposit: DepositData): Validator =
   Validator(
@@ -86,7 +86,7 @@ func compute_activation_exit_epoch*(epoch: Epoch): Epoch =
   ## ``epoch`` take effect.
   epoch + 1 + MAX_SEED_LOOKAHEAD
 
-# https://github.com/ethereum/consensus-specs/blob/v1.4.0/specs/phase0/beacon-chain.md#get_validator_churn_limit
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/phase0/beacon-chain.md#get_validator_churn_limit
 func get_validator_churn_limit*(
       cfg: RuntimeConfig, state: ForkyBeaconState, cache: var StateCache):
     uint64 =
@@ -589,7 +589,7 @@ iterator get_attesting_indices_iter*(state: ForkyBeaconState,
       if bits[index_in_committee]:
         yield validator_index
 
-# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.0/specs/electra/beacon-chain.md#modified-get_attesting_indices
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/electra/beacon-chain.md#modified-get_attesting_indices
 iterator get_attesting_indices_iter*(
     state: electra.BeaconState,
     data: AttestationData,
@@ -617,7 +617,7 @@ func get_attesting_indices*(
 
   toSeq(get_attesting_indices_iter(state, data, aggregation_bits, cache))
 
-# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.6/specs/phase0/beacon-chain.md#get_attesting_indices
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/phase0/beacon-chain.md#get_attesting_indices
 func get_attesting_indices*(
     state: ForkyBeaconState, data: AttestationData,
     aggregation_bits: ElectraCommitteeValidatorsBits, committee_bits: auto,
@@ -734,7 +734,7 @@ func check_attestation_target_epoch(
 
 # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.6/specs/phase0/beacon-chain.md#attestations
 # https://github.com/ethereum/consensus-specs/blob/v1.4.0/specs/altair/beacon-chain.md#modified-process_attestation
-# https://github.com/ethereum/consensus-specs/blob/v1.4.0/specs/deneb/beacon-chain.md#modified-process_attestation
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/deneb/beacon-chain.md#modified-process_attestation
 func check_attestation_inclusion(
     consensusFork: static ConsensusFork, attestation_slot: Slot,
     current_slot: Slot): Result[void, cstring] =
@@ -763,7 +763,7 @@ func check_attestation_index(
     Result[CommitteeIndex, cstring] =
   check_attestation_index(data.index, committees_per_slot)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.4.0/specs/altair/beacon-chain.md#get_attestation_participation_flag_indices
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/altair/beacon-chain.md#get_attestation_participation_flag_indices
 func get_attestation_participation_flag_indices(
     state: altair.BeaconState | bellatrix.BeaconState | capella.BeaconState,
     data: AttestationData, inclusion_delay: uint64): set[TimelyFlag] =
@@ -1166,17 +1166,17 @@ func get_next_sync_committee_keys(
     i += 1'u64
   res
 
-# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.5/specs/capella/beacon-chain.md#has_eth1_withdrawal_credential
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/capella/beacon-chain.md#has_eth1_withdrawal_credential
 func has_eth1_withdrawal_credential*(validator: Validator): bool =
   ## Check if ``validator`` has an 0x01 prefixed "eth1" withdrawal credential.
   validator.withdrawal_credentials.data[0] == ETH1_ADDRESS_WITHDRAWAL_PREFIX
 
-# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.0/specs/electra/beacon-chain.md#new-is_compounding_withdrawal_credential
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/electra/beacon-chain.md#new-is_compounding_withdrawal_credential
 func is_compounding_withdrawal_credential*(
     withdrawal_credentials: Eth2Digest): bool =
   withdrawal_credentials.data[0] == COMPOUNDING_WITHDRAWAL_PREFIX
 
-# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.0/specs/electra/beacon-chain.md#new-has_compounding_withdrawal_credential
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/electra/beacon-chain.md#new-has_compounding_withdrawal_credential
 func has_compounding_withdrawal_credential*(validator: Validator): bool =
   ## Check if ``validator`` has an 0x02 prefixed "compounding" withdrawal
   ## credential.
@@ -1859,7 +1859,7 @@ func upgrade_to_capella*(cfg: RuntimeConfig, pre: bellatrix.BeaconState):
     # historical_summaries initialized to correct default automatically
   )
 
-# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.6/specs/deneb/fork.md#upgrading-the-state
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/deneb/fork.md#upgrading-the-state
 func upgrade_to_deneb*(cfg: RuntimeConfig, pre: capella.BeaconState):
     ref deneb.BeaconState =
   let
diff --git a/beacon_chain/spec/datatypes/altair.nim b/beacon_chain/spec/datatypes/altair.nim
index 3c3e8fbba..69b22ab05 100644
--- a/beacon_chain/spec/datatypes/altair.nim
+++ b/beacon_chain/spec/datatypes/altair.nim
@@ -175,7 +175,7 @@ type
       ## Current sync committee corresponding to `header.beacon.state_root`
     current_sync_committee_branch*: CurrentSyncCommitteeBranch
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.5/specs/altair/light-client/sync-protocol.md#lightclientupdate
+  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/altair/light-client/sync-protocol.md#lightclientupdate
   LightClientUpdate* = object
     attested_header*: LightClientHeader
       ## Header attested to by the sync committee
diff --git a/beacon_chain/spec/datatypes/base.nim b/beacon_chain/spec/datatypes/base.nim
index 346be4637..3e440c724 100644
--- a/beacon_chain/spec/datatypes/base.nim
+++ b/beacon_chain/spec/datatypes/base.nim
@@ -326,7 +326,7 @@ type
     withdrawable_epoch*: Epoch
       ## When validator can withdraw funds
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.4.0/specs/phase0/beacon-chain.md#pendingattestation
+  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/phase0/beacon-chain.md#pendingattestation
   PendingAttestation* = object
     aggregation_bits*: CommitteeValidatorsBits
     data*: AttestationData
@@ -335,7 +335,7 @@ type
 
     proposer_index*: uint64 # `ValidatorIndex` after validation
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.6/specs/phase0/beacon-chain.md#historicalbatch
+  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/phase0/beacon-chain.md#historicalbatch
   HistoricalBatch* = object
     block_roots* : array[SLOTS_PER_HISTORICAL_ROOT, Eth2Digest]
     state_roots* : array[SLOTS_PER_HISTORICAL_ROOT, Eth2Digest]
@@ -371,7 +371,7 @@ type
     state_root*: Eth2Digest
     body_root*: Eth2Digest
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.6/specs/phase0/beacon-chain.md#signingdata
+  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/phase0/beacon-chain.md#signingdata
   SigningData* = object
     object_root*: Eth2Digest
     domain*: Eth2Domain
diff --git a/beacon_chain/spec/datatypes/capella.nim b/beacon_chain/spec/datatypes/capella.nim
index 3c70337db..82c956486 100644
--- a/beacon_chain/spec/datatypes/capella.nim
+++ b/beacon_chain/spec/datatypes/capella.nim
@@ -132,7 +132,7 @@ type
       ## Execution payload header corresponding to `beacon.body_root` (from Capella onward)
     execution_branch*: ExecutionBranch
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.5/specs/altair/light-client/sync-protocol.md#lightclientbootstrap
+  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/altair/light-client/sync-protocol.md#lightclientbootstrap
   LightClientBootstrap* = object
     header*: LightClientHeader
       ## Header matching the requested beacon block root
@@ -221,7 +221,7 @@ type
       ## (used to compute safety threshold)
     current_max_active_participants*: uint64
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.5/specs/capella/beacon-chain.md#beaconstate
+  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/capella/beacon-chain.md#beaconstate
   BeaconState* = object
     # Versioning
     genesis_time*: uint64
diff --git a/beacon_chain/spec/datatypes/constants.nim b/beacon_chain/spec/datatypes/constants.nim
index fdb83ae4b..2a84749a1 100644
--- a/beacon_chain/spec/datatypes/constants.nim
+++ b/beacon_chain/spec/datatypes/constants.nim
@@ -87,5 +87,5 @@ const
   UNSET_DEPOSIT_REQUESTS_START_INDEX*: uint64 = not 0'u64
   FULL_EXIT_REQUEST_AMOUNT*: uint64 = 0
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.0/specs/electra/beacon-chain.md#withdrawal-prefixes
+  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/electra/beacon-chain.md#withdrawal-prefixes
   COMPOUNDING_WITHDRAWAL_PREFIX* = 0x02
diff --git a/beacon_chain/spec/datatypes/deneb.nim b/beacon_chain/spec/datatypes/deneb.nim
index 042b55664..810be1717 100644
--- a/beacon_chain/spec/datatypes/deneb.nim
+++ b/beacon_chain/spec/datatypes/deneb.nim
@@ -76,7 +76,7 @@ type
     kzg_commitment*: KzgCommitment
     versioned_hash*: string  # TODO should be string; VersionedHash not distinct
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.5/specs/deneb/p2p-interface.md#blobidentifier
+  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/deneb/p2p-interface.md#blobidentifier
   BlobIdentifier* = object
     block_root*: Eth2Digest
     index*: BlobIndex
@@ -382,7 +382,7 @@ type
     state_root*: Eth2Digest
     body*: TrustedBeaconBlockBody
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.4.0/specs/deneb/beacon-chain.md#beaconblockbody
+  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/deneb/beacon-chain.md#beaconblockbody
   BeaconBlockBody* = object
     randao_reveal*: ValidatorSig
     eth1_data*: Eth1Data
@@ -466,7 +466,7 @@ type
     bls_to_execution_changes*: SignedBLSToExecutionChangeList
     blob_kzg_commitments*: KzgCommitments  # [New in Deneb]
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.6/specs/phase0/beacon-chain.md#signedbeaconblock
+  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/phase0/beacon-chain.md#signedbeaconblock
   SignedBeaconBlock* = object
     message*: BeaconBlock
     signature*: ValidatorSig
diff --git a/beacon_chain/spec/datatypes/electra.nim b/beacon_chain/spec/datatypes/electra.nim
index 4fba931f9..954950069 100644
--- a/beacon_chain/spec/datatypes/electra.nim
+++ b/beacon_chain/spec/datatypes/electra.nim
@@ -57,7 +57,7 @@ type
     signature*: ValidatorSig
     index*: uint64
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.0/specs/electra/beacon-chain.md#indexedattestation
+  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/electra/beacon-chain.md#indexedattestation
   IndexedAttestation* = object
     attesting_indices*:
       List[uint64, Limit MAX_VALIDATORS_PER_COMMITTEE * MAX_COMMITTEES_PER_SLOT]
@@ -191,7 +191,7 @@ type
   NextSyncCommitteeBranch =
     array[log2trunc(NEXT_SYNC_COMMITTEE_GINDEX), Eth2Digest]
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.4.0/specs/phase0/validator.md#aggregateandproof
+  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/phase0/validator.md#aggregateandproof
   AggregateAndProof* = object
     aggregator_index*: uint64 # `ValidatorIndex` after validation
     aggregate*: Attestation
@@ -211,7 +211,7 @@ type
       ## Execution payload header corresponding to `beacon.body_root` (from Capella onward)
     execution_branch*: capella.ExecutionBranch
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.5/specs/altair/light-client/sync-protocol.md#lightclientbootstrap
+  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/altair/light-client/sync-protocol.md#lightclientbootstrap
   LightClientBootstrap* = object
     header*: LightClientHeader
       ## Header matching the requested beacon block root
@@ -395,7 +395,7 @@ type
     data*: BeaconState
     root*: Eth2Digest # hash_tree_root(data)
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.6/specs/phase0/beacon-chain.md#beaconblock
+  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/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/helpers.nim b/beacon_chain/spec/helpers.nim
index e54671aa7..5c244eb72 100644
--- a/beacon_chain/spec/helpers.nim
+++ b/beacon_chain/spec/helpers.nim
@@ -159,7 +159,7 @@ 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/v1.4.0/specs/phase0/beacon-chain.md#get_domain
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/phase0/beacon-chain.md#get_domain
 func get_domain*(
     fork: Fork,
     domain_type: DomainType,
@@ -255,7 +255,7 @@ func create_blob_sidecars*(
     res.add(sidecar)
   res
 
-# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.5/specs/altair/light-client/sync-protocol.md#is_sync_committee_update
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/altair/light-client/sync-protocol.md#is_sync_committee_update
 template is_sync_committee_update*(update: SomeForkyLightClientUpdate): bool =
   when update is SomeForkyLightClientUpdateWithSyncCommittee:
     update.next_sync_committee_branch !=
diff --git a/beacon_chain/spec/keystore.nim b/beacon_chain/spec/keystore.nim
index 2cc14ff16..bd32f6871 100644
--- a/beacon_chain/spec/keystore.nim
+++ b/beacon_chain/spec/keystore.nim
@@ -1380,7 +1380,7 @@ proc createWallet*(kdfKind: KdfKind,
     crypto: crypto,
     nextAccount: nextAccount.get(0))
 
-# https://github.com/ethereum/consensus-specs/blob/v1.4.0/specs/phase0/validator.md#bls_withdrawal_prefix
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/phase0/validator.md#bls_withdrawal_prefix
 func makeWithdrawalCredentials*(k: ValidatorPubKey): Eth2Digest =
   var bytes = eth2digest(k.toRaw())
   bytes.data[0] = BLS_WITHDRAWAL_PREFIX.uint8
diff --git a/beacon_chain/spec/network.nim b/beacon_chain/spec/network.nim
index d456184cc..d36fe7112 100644
--- a/beacon_chain/spec/network.nim
+++ b/beacon_chain/spec/network.nim
@@ -14,7 +14,7 @@ import
 export base
 
 const
-  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/phase0/p2p-interface.md#topics-and-messages
+  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/phase0/p2p-interface.md#topics-and-messages
   # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/capella/p2p-interface.md#topics-and-messages
   topicBeaconBlocksSuffix* = "beacon_block/ssz_snappy"
   topicVoluntaryExitsSuffix* = "voluntary_exit/ssz_snappy"
diff --git a/beacon_chain/spec/signatures_batch.nim b/beacon_chain/spec/signatures_batch.nim
index 5374b68f5..02c0564de 100644
--- a/beacon_chain/spec/signatures_batch.nim
+++ b/beacon_chain/spec/signatures_batch.nim
@@ -83,7 +83,7 @@ func aggregateAttesters(
     # Aggregation spec requires non-empty collection
     # - https://tools.ietf.org/html/draft-irtf-cfrg-bls-signature-04
     # Consensus specs require at least one attesting index in attestation
-    # - https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.6/specs/phase0/beacon-chain.md#is_valid_indexed_attestation
+    # - https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/phase0/beacon-chain.md#is_valid_indexed_attestation
     return err("aggregateAttesters: no attesting indices")
 
   let
diff --git a/beacon_chain/spec/state_transition.nim b/beacon_chain/spec/state_transition.nim
index 3b72df934..ef922b96b 100644
--- a/beacon_chain/spec/state_transition.nim
+++ b/beacon_chain/spec/state_transition.nim
@@ -365,7 +365,7 @@ func partialBeaconBlock*(
 ): auto =
   const consensusFork = typeof(state).kind
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0/specs/phase0/validator.md#preparing-for-a-beaconblock
+  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/phase0/validator.md#preparing-for-a-beaconblock
   var res = consensusFork.BeaconBlock(
     slot: state.data.slot,
     proposer_index: proposer_index.uint64,
diff --git a/beacon_chain/spec/state_transition_block.nim b/beacon_chain/spec/state_transition_block.nim
index 035666e19..e9ad6237e 100644
--- a/beacon_chain/spec/state_transition_block.nim
+++ b/beacon_chain/spec/state_transition_block.nim
@@ -135,7 +135,7 @@ 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-beta.6/specs/phase0/beacon-chain.md#proposer-slashings
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/phase0/beacon-chain.md#proposer-slashings
 proc check_proposer_slashing*(
     state: ForkyBeaconState, proposer_slashing: SomeProposerSlashing,
     flags: UpdateFlags):
diff --git a/beacon_chain/spec/state_transition_epoch.nim b/beacon_chain/spec/state_transition_epoch.nim
index cad91c038..ddcd62653 100644
--- a/beacon_chain/spec/state_transition_epoch.nim
+++ b/beacon_chain/spec/state_transition_epoch.nim
@@ -535,7 +535,7 @@ func get_attestation_component_delta(
   else:
     RewardDelta(penalties: base_reward)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.6/specs/phase0/beacon-chain.md#components-of-attestation-deltas
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/phase0/beacon-chain.md#components-of-attestation-deltas
 func get_source_delta*(
     validator: RewardStatus,
     base_reward: Gwei,
@@ -694,7 +694,7 @@ func get_unslashed_participating_increment*(
     flag_index: TimelyFlag): uint64 =
   info.balances.previous_epoch[flag_index] div EFFECTIVE_BALANCE_INCREMENT.Gwei
 
-# https://github.com/ethereum/consensus-specs/blob/v1.4.0/specs/altair/beacon-chain.md#get_flag_index_deltas
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/altair/beacon-chain.md#get_flag_index_deltas
 func get_active_increments*(
     info: altair.EpochInfo | bellatrix.BeaconState): uint64 =
   info.balances.current_epoch div EFFECTIVE_BALANCE_INCREMENT.Gwei
@@ -986,7 +986,7 @@ func slashing_penalty_applies*(validator: Validator, epoch: Epoch): bool =
   epoch + EPOCHS_PER_SLASHINGS_VECTOR div 2 == validator.withdrawable_epoch
 
 # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.7/specs/phase0/beacon-chain.md#slashings
-# https://github.com/ethereum/consensus-specs/blob/v1.4.0/specs/altair/beacon-chain.md#slashings
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/altair/beacon-chain.md#slashings
 # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/bellatrix/beacon-chain.md#slashings
 func get_slashing_penalty*(validator: Validator,
                           adjusted_total_slashing_balance,
@@ -1113,7 +1113,7 @@ 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/v1.4.0-beta.6/specs/phase0/beacon-chain.md#historicalbatch
+    # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/phase0/beacon-chain.md#historicalbatch
     # In response to https://github.com/status-im/nimbus-eth2/issues/921
     if not state.historical_roots.add state.compute_historical_root():
       raiseAssert "no more room for historical roots, so long and thanks for the fish!"
@@ -1202,7 +1202,7 @@ func process_inactivity_updates*(
     if pre_inactivity_score != inactivity_score:
       state.inactivity_scores[index] = inactivity_score
 
-# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.5/specs/capella/beacon-chain.md#historical-summaries-updates
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/capella/beacon-chain.md#historical-summaries-updates
 func process_historical_summaries_update*(
     state: var (capella.BeaconState | deneb.BeaconState | electra.BeaconState)):
     Result[void, cstring] =
@@ -1369,7 +1369,7 @@ func init*(
            deneb.BeaconState | electra.BeaconState): T =
   init(result, state)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.4.0/specs/altair/beacon-chain.md#epoch-processing
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/altair/beacon-chain.md#epoch-processing
 proc process_epoch*(
     cfg: RuntimeConfig,
     state: var (altair.BeaconState | bellatrix.BeaconState),
diff --git a/beacon_chain/spec/validator.nim b/beacon_chain/spec/validator.nim
index b10fa09b3..cc04b33ce 100644
--- a/beacon_chain/spec/validator.nim
+++ b/beacon_chain/spec/validator.nim
@@ -158,7 +158,7 @@ func get_shuffled_active_validator_indices*(
   withState(state):
     cache.get_shuffled_active_validator_indices(forkyState.data, epoch)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.7/specs/phase0/beacon-chain.md#get_active_validator_indices
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/phase0/beacon-chain.md#get_active_validator_indices
 func count_active_validators*(state: ForkyBeaconState,
                               epoch: Epoch,
                               cache: var StateCache): uint64 =
@@ -394,7 +394,7 @@ func compute_proposer_index(state: ForkyBeaconState,
   ## Return from ``indices`` a random index sampled by effective balance.
   compute_proposer_index(state, indices, seed, shuffled_index)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.6/specs/phase0/beacon-chain.md#get_beacon_proposer_index
+# https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/phase0/beacon-chain.md#get_beacon_proposer_index
 func get_beacon_proposer_index*(
     state: ForkyBeaconState, cache: var StateCache, slot: Slot):
     Opt[ValidatorIndex] =
diff --git a/beacon_chain/sync/light_client_protocol.nim b/beacon_chain/sync/light_client_protocol.nim
index 909549732..339313c00 100644
--- a/beacon_chain/sync/light_client_protocol.nim
+++ b/beacon_chain/sync/light_client_protocol.nim
@@ -134,7 +134,7 @@ p2pProtocol LightClientSync(version = 1,
 
     debug "LC updates by range request done", peer, startPeriod, count, found
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.5/specs/altair/light-client/p2p-interface.md#getlightclientfinalityupdate
+  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/altair/light-client/p2p-interface.md#getlightclientfinalityupdate
   proc lightClientFinalityUpdate(
       peer: Peer,
       response: SingleChunkResponse[ForkedLightClientFinalityUpdate])
diff --git a/beacon_chain/validators/beacon_validators.nim b/beacon_chain/validators/beacon_validators.nim
index f6316bd89..7c99c28b7 100644
--- a/beacon_chain/validators/beacon_validators.nim
+++ b/beacon_chain/validators/beacon_validators.nim
@@ -1964,7 +1964,7 @@ proc handleValidatorDuties*(node: BeaconNode, lastSlot, slot: Slot) {.async: (ra
 
   updateValidatorMetrics(node) # the important stuff is done, update the vanity numbers
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.4.0/specs/phase0/validator.md#broadcast-aggregate
+  # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/phase0/validator.md#broadcast-aggregate
   # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/altair/validator.md#broadcast-sync-committee-contribution
   # Wait 2 / 3 of the slot time to allow messages to propagate, then collect
   # the result in aggregates
diff --git a/beacon_chain/validators/slashing_protection_v2.nim b/beacon_chain/validators/slashing_protection_v2.nim
index 0f1e201f4..96359db80 100644
--- a/beacon_chain/validators/slashing_protection_v2.nim
+++ b/beacon_chain/validators/slashing_protection_v2.nim
@@ -36,7 +36,7 @@ export results
 # - https://notes.ethereum.org/@djrtwo/Bkn3zpwxB#Validator-responsibilities
 #
 # Phase 0 spec - Honest Validator - how to avoid slashing
-# - https://github.com/ethereum/consensus-specs/blob/v1.4.0/specs/phase0/validator.md#how-to-avoid-slashing
+# - https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/phase0/validator.md#how-to-avoid-slashing
 #
 # In-depth reading on slashing conditions
 #
diff --git a/docs/attestation_flow.md b/docs/attestation_flow.md
index 31c792d37..9e48bceaf 100644
--- a/docs/attestation_flow.md
+++ b/docs/attestation_flow.md
@@ -6,7 +6,7 @@ This is a WIP document to explain the attestation flows.
 
 It is important to distinguish attestation `validation` from attestation `verification`.
 - Attestation `validation` is defined in the P2P specs. Validated attestations can be forwarded on GossipSub.
-  - Aggregated: https://github.com/ethereum/consensus-specs/blob/v1.4.0-alpha.1/specs/phase0/p2p-interface.md#beacon_aggregate_and_proof
+  - Aggregated: https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/specs/phase0/p2p-interface.md#beacon_aggregate_and_proof
   - Unaggregated: https://github.com/ethereum/consensus-specs/blob/v1.4.0/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/v1.4.0-beta.6/specs/phase0/beacon-chain.md#attestations
diff --git a/docs/block_flow.md b/docs/block_flow.md
index ec6be43c1..9c37f2154 100644
--- a/docs/block_flow.md
+++ b/docs/block_flow.md
@@ -9,7 +9,7 @@ Important distinction:
   https://github.com/ethereum/consensus-specs/blob/v1.4.0/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/v1.4.0-beta.6/specs/phase0/beacon-chain.md#block-processing
+  https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.3/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: