diff --git a/beacon_chain/beacon_clock.nim b/beacon_chain/beacon_clock.nim
index 07d50fd79..9befd2b7d 100644
--- a/beacon_chain/beacon_clock.nim
+++ b/beacon_chain/beacon_clock.nim
@@ -26,7 +26,7 @@ type
     ## which blocks are valid - in particular, blocks are not valid if they
     ## come from the future as seen from the local clock.
     ##
-    ## https://github.com/ethereum/consensus-specs/blob/v1.3.0/specs/phase0/fork-choice.md#fork-choice
+    ## https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.2/specs/phase0/fork-choice.md#fork-choice
     ##
     # TODO consider NTP and network-adjusted timestamps as outlined here:
     #      https://ethresear.ch/t/network-adjusted-timestamps/4187
diff --git a/beacon_chain/consensus_object_pools/README.md b/beacon_chain/consensus_object_pools/README.md
index cfaf1a514..30c8007d2 100644
--- a/beacon_chain/consensus_object_pools/README.md
+++ b/beacon_chain/consensus_object_pools/README.md
@@ -4,12 +4,12 @@ This folder holds the various consensus object pools needed for a blockchain cli
 
 Object in those pools have passed the "gossip validation" filter according
 to specs:
-- blocks: https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/phase0/p2p-interface.md#beacon_block
-- aggregate attestations: https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/phase0/p2p-interface.md#beacon_aggregate_and_proof
+- blocks: https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.2/specs/phase0/p2p-interface.md#beacon_block
+- aggregate attestations: https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.2/specs/phase0/p2p-interface.md#beacon_aggregate_and_proof
 - unaggregated attestation: https://github.com/ethereum/consensus-specs/blob/v1.3.0/specs/phase0/p2p-interface.md#beacon_attestation_subnet_id
-- voluntary exits: https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/phase0/p2p-interface.md#voluntary_exit
-- Attester slashings: https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/phase0/p2p-interface.md#attester_slashing
-- Proposer slashings: https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/phase0/p2p-interface.md#proposer_slashing
+- voluntary exits: https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.2/specs/phase0/p2p-interface.md#voluntary_exit
+- Attester slashings: https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.2/specs/phase0/p2p-interface.md#attester_slashing
+- Proposer slashings: https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.2/specs/phase0/p2p-interface.md#proposer_slashing
 
 After "gossip validation" the consensus objects can be rebroadcasted as they are optimistically good, however for internal processing further verification is needed.
 For blocks, this means verifying state transition and all contained cryptographic signatures (instead of just the proposer signature).
diff --git a/beacon_chain/consensus_object_pools/spec_cache.nim b/beacon_chain/consensus_object_pools/spec_cache.nim
index 2f7844065..adcd0bd67 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/v1.4.0-beta.1/specs/phase0/validator.md#attestation-data
+  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.2/specs/phase0/validator.md#attestation-data
   AttestationData(
     slot: slot,
     index: committee_index.asUInt64,
diff --git a/beacon_chain/el/el_manager.nim b/beacon_chain/el/el_manager.nim
index b49542930..6868c3bc3 100644
--- a/beacon_chain/el/el_manager.nim
+++ b/beacon_chain/el/el_manager.nim
@@ -1715,7 +1715,7 @@ template trackFinalizedState*(m: ELManager,
                               finalizedStateDepositIndex: uint64): bool =
   trackFinalizedState(m.eth1Chain, finalizedEth1Data, finalizedStateDepositIndex)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/phase0/validator.md#get_eth1_data
+# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.2/specs/phase0/validator.md#get_eth1_data
 proc getBlockProposalData*(chain: var Eth1Chain,
                            state: ForkedHashedBeaconState,
                            finalizedEth1Data: Eth1Data,
diff --git a/beacon_chain/fork_choice/fork_choice.nim b/beacon_chain/fork_choice/fork_choice.nim
index 5a05bf410..e45250365 100644
--- a/beacon_chain/fork_choice/fork_choice.nim
+++ b/beacon_chain/fork_choice/fork_choice.nim
@@ -113,7 +113,7 @@ proc update_justified(
   self.update_justified(dag, blck, justified.epoch)
   ok()
 
-# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/phase0/fork-choice.md#update_checkpoints
+# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.2/specs/phase0/fork-choice.md#update_checkpoints
 proc update_checkpoints(
     self: var Checkpoints, dag: ChainDAGRef,
     checkpoints: FinalityCheckpoints): FcResult[void] =
diff --git a/beacon_chain/fork_choice/proto_array.nim b/beacon_chain/fork_choice/proto_array.nim
index 02075ea0b..3ec542c8b 100644
--- a/beacon_chain/fork_choice/proto_array.nim
+++ b/beacon_chain/fork_choice/proto_array.nim
@@ -125,7 +125,7 @@ iterator realizePendingCheckpoints*(
   # Reset tip tracking for new epoch
   self.currentEpochTips.clear()
 
-# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/phase0/fork-choice.md#get_weight
+# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.2/specs/phase0/fork-choice.md#get_weight
 func calculateProposerBoost(justifiedTotalActiveBalance: Gwei): Gwei =
   let committee_weight = justifiedTotalActiveBalance div SLOTS_PER_EPOCH
   (committee_weight * PROPOSER_SCORE_BOOST) div 100
@@ -189,7 +189,7 @@ func applyScoreChanges*(self: var ProtoArray,
     # If we find the node matching the current proposer boost root, increase
     # the delta by the new score amount.
     #
-    # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/phase0/fork-choice.md#get_weight
+    # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.2/specs/phase0/fork-choice.md#get_weight
     if (not proposerBoostRoot.isZero) and proposerBoostRoot == node.bid.root:
       proposerBoostScore = calculateProposerBoost(justifiedTotalActiveBalance)
       if  nodeDelta >= 0 and
diff --git a/beacon_chain/libnimbus_lc/libnimbus_lc.h b/beacon_chain/libnimbus_lc/libnimbus_lc.h
index 27bd06760..968dcd359 100644
--- a/beacon_chain/libnimbus_lc/libnimbus_lc.h
+++ b/beacon_chain/libnimbus_lc/libnimbus_lc.h
@@ -149,11 +149,11 @@ 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.1/specs/phase0/beacon-chain.md#beaconstate
- * @see https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/altair/beacon-chain.md#beaconstate
- * @see https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/bellatrix/beacon-chain.md#beaconstate
- * @see https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/capella/beacon-chain.md#beaconstate
- * @see https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/configs/README.md
+ * @see https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.2/specs/phase0/beacon-chain.md#beaconstate
+ * @see https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.2/specs/altair/beacon-chain.md#beaconstate
+ * @see https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.2/specs/bellatrix/beacon-chain.md#beaconstate
+ * @see https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.2/specs/capella/beacon-chain.md#beaconstate
+ * @see https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.2/configs/README.md
  */
 ETH_RESULT_USE_CHECK
 ETHBeaconState *ETHBeaconStateCreateFromSsz(
@@ -198,7 +198,7 @@ ETHRoot *ETHBeaconStateCopyGenesisValidatorsRoot(const ETHBeaconState *state);
  *
  * @param      root                 Merkle root.
  *
- * @see https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/phase0/beacon-chain.md#custom-types
+ * @see https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.2/specs/phase0/beacon-chain.md#custom-types
  */
 void ETHRootDestroy(ETHRoot *root);
 
@@ -576,7 +576,7 @@ typedef struct ETHLightClientHeader ETHLightClientHeader;
  *
  * @return Latest finalized header.
  *
- * @see https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/capella/light-client/sync-protocol.md#modified-lightclientheader
+ * @see https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.2/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 ed376d9ae..13026dcd7 100644
--- a/beacon_chain/networking/eth2_network.nim
+++ b/beacon_chain/networking/eth2_network.nim
@@ -2568,7 +2568,7 @@ proc updateStabilitySubnetMetadata*(node: Eth2Node, attnets: AttnetBits) =
   node.metadata.attnets = attnets
 
   # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/phase0/p2p-interface.md#attestation-subnet-subscription
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0/specs/phase0/p2p-interface.md#attestation-subnet-bitfield
+  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.2/specs/phase0/p2p-interface.md#attestation-subnet-bitfield
   let res = node.discovery.updateRecord({
     enrAttestationSubnetsField: SSZ.encode(node.metadata.attnets)
   })
@@ -2580,7 +2580,7 @@ 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/v1.4.0-beta.1/specs/altair/validator.md#sync-committee-subnet-stability
+  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.2/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 ec51fddf0..2436e143b 100644
--- a/beacon_chain/nimbus_beacon_node.nim
+++ b/beacon_chain/nimbus_beacon_node.nim
@@ -800,7 +800,7 @@ func forkDigests(node: BeaconNode): auto =
     node.dag.forkDigests.deneb]
   forkDigestsArray
 
-# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/phase0/p2p-interface.md#attestation-subnet-subscription
+# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.2/specs/phase0/p2p-interface.md#attestation-subnet-subscription
 proc updateAttestationSubnetHandlers(node: BeaconNode, slot: Slot) =
   if node.gossipState.card == 0:
     # When disconnected, updateGossipState is responsible for all things
@@ -1598,7 +1598,7 @@ proc installMessageValidators(node: BeaconNode) =
               MsgSource.gossip, signedAggregateAndProof)))
 
       # attester_slashing
-      # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/phase0/p2p-interface.md#attester_slashing
+      # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.2/specs/phase0/p2p-interface.md#attester_slashing
       node.network.addValidator(
         getAttesterSlashingsTopic(digest), proc (
           attesterSlashing: AttesterSlashing
@@ -1642,7 +1642,7 @@ proc installMessageValidators(node: BeaconNode) =
                     MsgSource.gossip, msg, idx)))
 
         # sync_committee_contribution_and_proof
-        # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/altair/p2p-interface.md#sync_committee_contribution_and_proof
+        # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.2/specs/altair/p2p-interface.md#sync_committee_contribution_and_proof
         node.network.addAsyncValidator(
           getSyncCommitteeContributionAndProofTopic(digest), proc (
             msg: SignedContributionAndProof
diff --git a/beacon_chain/spec/beacon_time.nim b/beacon_chain/spec/beacon_time.nim
index 44f7d5115..b7b96efcd 100644
--- a/beacon_chain/spec/beacon_time.nim
+++ b/beacon_chain/spec/beacon_time.nim
@@ -142,7 +142,7 @@ const
   # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/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/v1.4.0-beta.1/specs/altair/validator.md#broadcast-sync-committee-contribution
+  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.2/specs/altair/validator.md#broadcast-sync-committee-contribution
   syncContributionSlotOffset* = TimeDiff(nanoseconds:
     NANOSECONDS_PER_SLOT.int64  * 2 div INTERVALS_PER_SLOT)
   # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.2/specs/altair/light-client/p2p-interface.md#sync-committee
diff --git a/beacon_chain/spec/beaconstate.nim b/beacon_chain/spec/beaconstate.nim
index c78605f99..e5936c541 100644
--- a/beacon_chain/spec/beaconstate.nim
+++ b/beacon_chain/spec/beaconstate.nim
@@ -267,7 +267,7 @@ func get_initial_beacon_block*(state: bellatrix.HashedBeaconState):
   bellatrix.TrustedSignedBeaconBlock(
     message: message, root: hash_tree_root(message))
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0/specs/capella/beacon-chain.md#testing
+# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.2/specs/capella/beacon-chain.md#testing
 func get_initial_beacon_block*(state: capella.HashedBeaconState):
     capella.TrustedSignedBeaconBlock =
   # The genesis block is implicitly trusted
@@ -324,7 +324,7 @@ func get_block_root*(state: ForkedHashedBeaconState, epoch: Epoch): Eth2Digest =
   withState(state):
     get_block_root(forkyState.data, epoch)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.4.0-alpha.3/specs/phase0/beacon-chain.md#get_total_balance
+# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.2/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``.
@@ -546,7 +546,7 @@ func get_attestation_participation_flag_indices(
 
   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
+# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.2/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] =
@@ -811,7 +811,7 @@ func is_fully_withdrawable_validator(
   has_eth1_withdrawal_credential(validator) and
     validator.withdrawable_epoch <= epoch and balance > 0
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0/specs/capella/beacon-chain.md#is_partially_withdrawable_validator
+# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.2/specs/capella/beacon-chain.md#is_partially_withdrawable_validator
 func is_partially_withdrawable_validator(
     validator: Validator, balance: Gwei): bool =
   ## Check if ``validator`` is partially withdrawable.
@@ -979,7 +979,7 @@ 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/v1.3.0/specs/bellatrix/beacon-chain.md#testing
+# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.2/specs/bellatrix/beacon-chain.md#testing
 # https://github.com/ethereum/consensus-specs/blob/v1.3.0/specs/capella/beacon-chain.md#testing
 # https://github.com/ethereum/consensus-specs/blob/v1.3.0/specs/deneb/beacon-chain.md#testing
 proc initialize_beacon_state_from_eth1*(
diff --git a/beacon_chain/spec/datatypes/altair.nim b/beacon_chain/spec/datatypes/altair.nim
index 9bec04248..4d87fb652 100644
--- a/beacon_chain/spec/datatypes/altair.nim
+++ b/beacon_chain/spec/datatypes/altair.nim
@@ -79,7 +79,7 @@ static: doAssert TIMELY_SOURCE_WEIGHT + TIMELY_TARGET_WEIGHT +
 type
   ### New types
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-alpha.3/specs/altair/beacon-chain.md#custom-types
+  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.2/specs/altair/beacon-chain.md#custom-types
   ParticipationFlags* = uint8
 
   EpochParticipationFlags* =
@@ -116,7 +116,7 @@ type
     signature*: ValidatorSig
       ## Signature by the validator over the block root of `slot`
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/altair/validator.md#synccommitteecontribution
+  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.2/specs/altair/validator.md#synccommitteecontribution
   SyncCommitteeAggregationBits* =
     BitArray[SYNC_SUBCOMMITTEE_SIZE]
 
@@ -261,7 +261,7 @@ type
 
   InactivityScores* = HashList[uint64, Limit VALIDATOR_REGISTRY_LIMIT]
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-alpha.3/specs/altair/beacon-chain.md#beaconstate
+  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.2/specs/altair/beacon-chain.md#beaconstate
   BeaconState* = object
     # Versioning
     genesis_time*: uint64
diff --git a/beacon_chain/spec/datatypes/base.nim b/beacon_chain/spec/datatypes/base.nim
index 72a3953a0..4fce15f53 100644
--- a/beacon_chain/spec/datatypes/base.nim
+++ b/beacon_chain/spec/datatypes/base.nim
@@ -343,7 +343,7 @@ type
     withdrawable_epoch*: Epoch
       ## When validator can withdraw funds
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-alpha.3/specs/phase0/beacon-chain.md#pendingattestation
+  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.2/specs/phase0/beacon-chain.md#pendingattestation
   PendingAttestation* = object
     aggregation_bits*: CommitteeValidatorsBits
     data*: AttestationData
diff --git a/beacon_chain/spec/datatypes/constants.nim b/beacon_chain/spec/datatypes/constants.nim
index f2114e1e8..e72402c3a 100644
--- a/beacon_chain/spec/datatypes/constants.nim
+++ b/beacon_chain/spec/datatypes/constants.nim
@@ -10,7 +10,7 @@ type
   Epoch* = distinct uint64
   SyncCommitteePeriod* = distinct uint64
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0/specs/capella/beacon-chain.md#custom-types
+  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.2/specs/capella/beacon-chain.md#custom-types
   WithdrawalIndex* = uint64
 
   DomainType* = distinct array[4, byte]
diff --git a/beacon_chain/spec/datatypes/deneb.nim b/beacon_chain/spec/datatypes/deneb.nim
index 7f528f1af..1974932fb 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.2/specs/deneb/polynomial-commitments.md#constants
   BYTES_PER_FIELD_ELEMENT = 32
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/deneb/beacon-chain.md#blob
+  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.2/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
@@ -72,7 +72,7 @@ type
     message*: BlobSidecar
     signature*: ValidatorSig
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0/specs/deneb/p2p-interface.md#blobidentifier
+  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.2/specs/deneb/p2p-interface.md#blobidentifier
   BlobIdentifier* = object
     block_root*: Eth2Digest
     index*: BlobIndex
diff --git a/beacon_chain/spec/network.nim b/beacon_chain/spec/network.nim
index 11f7f6287..340f19a29 100644
--- a/beacon_chain/spec/network.nim
+++ b/beacon_chain/spec/network.nim
@@ -89,13 +89,13 @@ func getAttestationTopic*(forkDigest: ForkDigest,
   ## For subscribing and unsubscribing to/from a subnet.
   eth2Prefix(forkDigest) & "beacon_attestation_" & $(subnetId) & "/ssz_snappy"
 
-# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/altair/p2p-interface.md#topics-and-messages
+# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.2/specs/altair/p2p-interface.md#topics-and-messages
 func getSyncCommitteeTopic*(forkDigest: ForkDigest,
                             subcommitteeIdx: SyncSubcommitteeIndex): string =
   ## For subscribing and unsubscribing to/from a subnet.
   eth2Prefix(forkDigest) & "sync_committee_" & $subcommitteeIdx & "/ssz_snappy"
 
-# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/altair/p2p-interface.md#topics-and-messages
+# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.2/specs/altair/p2p-interface.md#topics-and-messages
 func getSyncCommitteeContributionAndProofTopic*(forkDigest: ForkDigest): string =
   ## For subscribing and unsubscribing to/from a subnet.
   eth2Prefix(forkDigest) & "sync_committee_contribution_and_proof/ssz_snappy"
diff --git a/beacon_chain/spec/signatures.nim b/beacon_chain/spec/signatures.nim
index f25240b77..48d8d0420 100644
--- a/beacon_chain/spec/signatures.nim
+++ b/beacon_chain/spec/signatures.nim
@@ -299,7 +299,7 @@ proc verify_sync_committee_signature*(
 
   blsFastAggregateVerify(pubkeys, signing_root.data, signature)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/altair/validator.md#aggregation-selection
+# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.2/specs/altair/validator.md#aggregation-selection
 func compute_sync_committee_selection_proof_signing_root*(
     fork: Fork, genesis_validators_root: Eth2Digest,
     slot: Slot, subcommittee_index: SyncSubcommitteeIndex): Eth2Digest =
@@ -348,7 +348,7 @@ proc get_contribution_and_proof_signature*(
 
   blsSign(privkey, signing_root.data)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/altair/validator.md#aggregation-selection
+# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.2/specs/altair/validator.md#aggregation-selection
 func is_sync_committee_aggregator*(signature: ValidatorSig): bool =
   let
     signatureDigest = eth2digest(signature.blob)
diff --git a/beacon_chain/validators/validator_pool.nim b/beacon_chain/validators/validator_pool.nim
index c51dfb62a..8f8428a3b 100644
--- a/beacon_chain/validators/validator_pool.nim
+++ b/beacon_chain/validators/validator_pool.nim
@@ -485,7 +485,7 @@ proc signData(v: AttachedValidator,
   else:
     v.signWithDistributedKey(request)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/phase0/validator.md#signature
+# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.2/specs/phase0/validator.md#signature
 proc getBlockSignature*(v: AttachedValidator, fork: Fork,
                         genesis_validators_root: Eth2Digest, slot: Slot,
                         block_root: Eth2Digest,
diff --git a/docs/attestation_flow.md b/docs/attestation_flow.md
index e9eb14bff..e4f6c6caf 100644
--- a/docs/attestation_flow.md
+++ b/docs/attestation_flow.md
@@ -51,7 +51,7 @@ These GossipSub topics are used to listen for attestations:
 - Unaggregated: `/eth2/{$forkDigest}/beacon_attestation_{subnetIndex}/ssz_snappy`
 
 The attestations are then validated by `validateAttestation()` or `validateAggregate()` in either `attestationValidator()` or `aggregateValidator()` according to the P2P specs.
-- https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/phase0/p2p-interface.md#beacon_aggregate_and_proof
+- https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.2/specs/phase0/p2p-interface.md#beacon_aggregate_and_proof
 - https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/phase0/p2p-interface.md#attestation-subnets
 
 Finally, valid attestations are added to the local `attestationPool`.
diff --git a/tests/testblockutil.nim b/tests/testblockutil.nim
index 649764874..a01452914 100644
--- a/tests/testblockutil.nim
+++ b/tests/testblockutil.nim
@@ -268,7 +268,7 @@ func makeAttestationData*(
     "Computed epoch was " & $slot.epoch &
     "  while the state current_epoch was " & $current_epoch
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/phase0/validator.md#attestation-data
+  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.2/specs/phase0/validator.md#attestation-data
   AttestationData(
     slot: slot,
     index: committee_index.uint64,