diff --git a/beacon_chain/consensus_object_pools/spec_cache.nim b/beacon_chain/consensus_object_pools/spec_cache.nim
index eb991f0251..44420dff5c 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.3/specs/phase0/validator.md#attestation-data
+  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.4/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 313d215f6f..d1196c038d 100644
--- a/beacon_chain/el/el_manager.nim
+++ b/beacon_chain/el/el_manager.nim
@@ -413,11 +413,11 @@ template toGaugeValue(x: Quantity): int64 =
 #  doAssert SECONDS_PER_ETH1_BLOCK * cfg.ETH1_FOLLOW_DISTANCE < GENESIS_DELAY,
 #             "Invalid configuration: GENESIS_DELAY is set too low"
 
-# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.3/specs/phase0/validator.md#get_eth1_data
+# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.4/specs/phase0/validator.md#get_eth1_data
 func compute_time_at_slot(genesis_time: uint64, slot: Slot): uint64 =
   genesis_time + slot * SECONDS_PER_SLOT
 
-# 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.4/specs/phase0/validator.md#get_eth1_data
 func voting_period_start_time(state: ForkedHashedBeaconState): uint64 =
   let eth1_voting_period_start_slot =
     getStateField(state, slot) - getStateField(state, slot) mod
@@ -425,7 +425,7 @@ func voting_period_start_time(state: ForkedHashedBeaconState): uint64 =
   compute_time_at_slot(
     getStateField(state, genesis_time), eth1_voting_period_start_slot)
 
-# 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.4/specs/phase0/validator.md#get_eth1_data
 func is_candidate_block(cfg: RuntimeConfig,
                         blk: Eth1Block,
                         period_start: uint64): bool =
@@ -1258,7 +1258,7 @@ proc forkchoiceUpdated*(m: ELManager,
   # block hash provided by this event is stubbed with
   # `0x0000000000000000000000000000000000000000000000000000000000000000`."
   # and
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0/specs/bellatrix/validator.md#executionpayload
+  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.4/specs/bellatrix/validator.md#executionpayload
   # notes "`finalized_block_hash` is the hash of the latest finalized execution
   # payload (`Hash32()` if none yet finalized)"
 
diff --git a/beacon_chain/fork_choice/fork_choice.nim b/beacon_chain/fork_choice/fork_choice.nim
index 51fa7e5dbc..9f67bcddea 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.3/specs/phase0/fork-choice.md#update_checkpoints
+# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.4/specs/phase0/fork-choice.md#update_checkpoints
 proc update_checkpoints(
     self: var Checkpoints, dag: ChainDAGRef,
     checkpoints: FinalityCheckpoints): FcResult[void] =
@@ -218,7 +218,7 @@ proc update_time*(self: var ForkChoice, dag: ChainDAGRef, time: BeaconTime):
 
   ok()
 
-# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/phase0/fork-choice.md#on_attestation
+# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.4/specs/phase0/fork-choice.md#on_attestation
 proc on_attestation*(
        self: var ForkChoice,
        dag: ChainDAGRef,
diff --git a/beacon_chain/gossip_processing/README.md b/beacon_chain/gossip_processing/README.md
index a201fd98fa..1f1fe4b4b4 100644
--- a/beacon_chain/gossip_processing/README.md
+++ b/beacon_chain/gossip_processing/README.md
@@ -10,11 +10,11 @@ This folder holds a collection of modules to:
 Gossip validation is different from consensus verification in particular for blocks.
 
 - Blocks: https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.4/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 (aggregated): https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.4/specs/phase0/p2p-interface.md#beacon_aggregate_and_proof
 - 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-beta.1/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
+- Voluntary exits: https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.4/specs/phase0/p2p-interface.md#voluntary_exit
+- Proposer slashings: https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.4/specs/phase0/p2p-interface.md#proposer_slashing
+- Attester slashing: https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.4/specs/phase0/p2p-interface.md#attester_slashing
 
 There are multiple consumers of validated consensus objects:
 - a `ValidationResult.Accept` output triggers rebroadcasting in libp2p
diff --git a/beacon_chain/gossip_processing/gossip_validation.nim b/beacon_chain/gossip_processing/gossip_validation.nim
index 8aedab031c..1dbc3e8b56 100644
--- a/beacon_chain/gossip_processing/gossip_validation.nim
+++ b/beacon_chain/gossip_processing/gossip_validation.nim
@@ -1002,7 +1002,7 @@ proc validateAggregate*(
 
   return ok((attesting_indices, sig))
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0/specs/capella/p2p-interface.md#bls_to_execution_change
+# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.4/specs/capella/p2p-interface.md#bls_to_execution_change
 proc validateBlsToExecutionChange*(
     pool: ValidatorChangePool, batchCrypto: ref BatchCrypto,
     signed_address_change: SignedBLSToExecutionChange,
diff --git a/beacon_chain/libnimbus_lc/libnimbus_lc.h b/beacon_chain/libnimbus_lc/libnimbus_lc.h
index 1c00d71bcc..39394c9840 100644
--- a/beacon_chain/libnimbus_lc/libnimbus_lc.h
+++ b/beacon_chain/libnimbus_lc/libnimbus_lc.h
@@ -150,9 +150,9 @@ typedef struct ETHBeaconState ETHBeaconState;
  * @return `NULL` - If the given `sszBytes` is malformed.
  *
  * @see https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.3/specs/phase0/beacon-chain.md#beaconstate
- * @see https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.3/specs/altair/beacon-chain.md#beaconstate
+ * @see https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.4/specs/altair/beacon-chain.md#beaconstate
  * @see https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.3/specs/bellatrix/beacon-chain.md#beaconstate
- * @see https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.3/specs/capella/beacon-chain.md#beaconstate
+ * @see https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.4/specs/capella/beacon-chain.md#beaconstate
  * @see https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.3/configs/README.md
  */
 ETH_RESULT_USE_CHECK
@@ -268,7 +268,7 @@ void ETHBeaconClockDestroy(ETHBeaconClock *beaconClock);
  * @return Slot number for the current wall clock time - If genesis has occurred.
  * @return `0` - If genesis is still pending.
  *
- * @see https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.0/specs/phase0/beacon-chain.md#custom-types
+ * @see https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.4/specs/phase0/beacon-chain.md#custom-types
  */
 ETH_RESULT_USE_CHECK
 int ETHBeaconClockGetSlot(const ETHBeaconClock *beaconClock);
@@ -576,7 +576,7 @@ typedef struct ETHLightClientHeader ETHLightClientHeader;
  *
  * @return Latest finalized header.
  *
- * @see https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.2/specs/capella/light-client/sync-protocol.md#modified-lightclientheader
+ * @see https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.4/specs/capella/light-client/sync-protocol.md#modified-lightclientheader
  */
 ETH_RESULT_USE_CHECK
 const ETHLightClientHeader *ETHLightClientStoreGetFinalizedHeader(
@@ -595,7 +595,7 @@ const ETHLightClientHeader *ETHLightClientStoreGetFinalizedHeader(
  * @return Whether or not the next sync committee is currently known.
  *
  * @see https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/altair/light-client/sync-protocol.md#is_next_sync_committee_known
- * @see https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.3/specs/altair/light-client/light-client.md
+ * @see https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.4/specs/altair/light-client/light-client.md
  */
 ETH_RESULT_USE_CHECK
 bool ETHLightClientStoreIsNextSyncCommitteeKnown(const ETHLightClientStore *store);
@@ -611,7 +611,7 @@ bool ETHLightClientStoreIsNextSyncCommitteeKnown(const ETHLightClientStore *stor
  *
  * @return Latest optimistic header.
  *
- * @see https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.0/specs/capella/light-client/sync-protocol.md#modified-lightclientheader
+ * @see https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.4/specs/capella/light-client/sync-protocol.md#modified-lightclientheader
  */
 ETH_RESULT_USE_CHECK
 const ETHLightClientHeader *ETHLightClientStoreGetOptimisticHeader(
@@ -772,7 +772,7 @@ const ETHRoot *ETHBeaconBlockHeaderGetBodyRoot(const ETHBeaconBlockHeader *beaco
  *
  * @return Pointer to a copy of the given header's execution block hash.
  *
- * @see https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.0/specs/deneb/beacon-chain.md#executionpayloadheader
+ * @see https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.4/specs/deneb/beacon-chain.md#executionpayloadheader
  */
 ETH_RESULT_USE_CHECK
 ETHRoot *ETHLightClientHeaderCopyExecutionHash(
diff --git a/beacon_chain/networking/eth2_network.nim b/beacon_chain/networking/eth2_network.nim
index 0501bf7197..71fdf984bc 100644
--- a/beacon_chain/networking/eth2_network.nim
+++ b/beacon_chain/networking/eth2_network.nim
@@ -2542,7 +2542,7 @@ proc subscribeAttestationSubnets*(
 
 proc unsubscribeAttestationSubnets*(
     node: Eth2Node, subnets: AttnetBits, forkDigest: ForkDigest) =
-  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/phase0/p2p-interface.md#attestations-and-aggregation
+  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.4/specs/phase0/p2p-interface.md#attestations-and-aggregation
   # Nimbus won't score attestation subnets for now; we just rely on block and
   # aggregate which are more stable and reliable
 
@@ -2551,7 +2551,7 @@ 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-beta.1/specs/phase0/p2p-interface.md#metadata
+  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.4/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 d5f7689aed..bd51f5cfc1 100644
--- a/beacon_chain/nimbus_beacon_node.nim
+++ b/beacon_chain/nimbus_beacon_node.nim
@@ -1663,7 +1663,7 @@ proc installMessageValidators(node: BeaconNode) =
                   MsgSource.gossip, attestation, subnet_id)))
 
       # beacon_aggregate_and_proof
-      # https://github.com/ethereum/consensus-specs/blob/v1.3.0/specs/phase0/p2p-interface.md#beacon_aggregate_and_proof
+      # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.4/specs/phase0/p2p-interface.md#beacon_aggregate_and_proof
       node.network.addAsyncValidator(
         getAggregateAndProofsTopic(digest), proc (
           signedAggregateAndProof: SignedAggregateAndProof
@@ -1683,7 +1683,7 @@ proc installMessageValidators(node: BeaconNode) =
               MsgSource.gossip, attesterSlashing)))
 
       # proposer_slashing
-      # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/phase0/p2p-interface.md#proposer_slashing
+      # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.4/specs/phase0/p2p-interface.md#proposer_slashing
       node.network.addValidator(
         getProposerSlashingsTopic(digest), proc (
           proposerSlashing: ProposerSlashing
@@ -1693,7 +1693,7 @@ proc installMessageValidators(node: BeaconNode) =
               MsgSource.gossip, proposerSlashing)))
 
       # voluntary_exit
-      # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/phase0/p2p-interface.md#voluntary_exit
+      # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.4/specs/phase0/p2p-interface.md#voluntary_exit
       node.network.addValidator(
         getVoluntaryExitsTopic(digest), proc (
           signedVoluntaryExit: SignedVoluntaryExit
@@ -1704,7 +1704,7 @@ proc installMessageValidators(node: BeaconNode) =
 
       when consensusFork >= ConsensusFork.Altair:
         # sync_committee_{subnet_id}
-        # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/altair/p2p-interface.md#sync_committee_subnet_id
+        # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.4/specs/altair/p2p-interface.md#sync_committee_subnet_id
         for subcommitteeIdx in SyncSubcommitteeIndex:
           closureScope:  # Needed for inner `proc`; don't lift it out of loop.
             let idx = subcommitteeIdx
diff --git a/beacon_chain/spec/beacon_time.nim b/beacon_chain/spec/beacon_time.nim
index 487b7cd724..6fa5b7640c 100644
--- a/beacon_chain/spec/beacon_time.nim
+++ b/beacon_chain/spec/beacon_time.nim
@@ -43,7 +43,7 @@ const
   GENESIS_SLOT* = Slot(0)
   GENESIS_EPOCH* = Epoch(0) # compute_epoch_at_slot(GENESIS_SLOT)
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/phase0/fork-choice.md#constant
+  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.4/specs/phase0/fork-choice.md#constant
   INTERVALS_PER_SLOT* = 3
 
   FAR_FUTURE_BEACON_TIME* = BeaconTime(ns_since_genesis: int64.high())
@@ -136,7 +136,7 @@ const
   # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/phase0/validator.md#attesting
   attestationSlotOffset* = TimeDiff(nanoseconds:
     NANOSECONDS_PER_SLOT.int64 div INTERVALS_PER_SLOT)
-  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/phase0/validator.md#broadcast-aggregate
+  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.4/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/v1.4.0-beta.1/specs/altair/validator.md#prepare-sync-committee-message
diff --git a/beacon_chain/spec/beaconstate.nim b/beacon_chain/spec/beaconstate.nim
index 6f0974d074..13ad7459bf 100644
--- a/beacon_chain/spec/beaconstate.nim
+++ b/beacon_chain/spec/beaconstate.nim
@@ -336,7 +336,7 @@ template get_total_balance(
     res += state.validators[validator_index].effective_balance
   max(EFFECTIVE_BALANCE_INCREMENT, res)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.4.0-alpha.3/specs/phase0/beacon-chain.md#is_eligible_for_activation_queue
+# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.4/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
@@ -352,7 +352,7 @@ func is_eligible_for_activation*(
   # Has not yet been activated
     validator.activation_epoch == FAR_FUTURE_EPOCH
 
-# https://github.com/ethereum/consensus-specs/blob/v1.4.0-alpha.3/specs/phase0/beacon-chain.md#is_valid_indexed_attestation
+# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.4/specs/phase0/beacon-chain.md#is_valid_indexed_attestation
 proc is_valid_indexed_attestation*(
     state: ForkyBeaconState, indexed_attestation: SomeIndexedAttestation,
     flags: UpdateFlags): Result[void, cstring] =
diff --git a/beacon_chain/spec/datatypes/altair.nim b/beacon_chain/spec/datatypes/altair.nim
index 3a7aaf1709..33ced1551e 100644
--- a/beacon_chain/spec/datatypes/altair.nim
+++ b/beacon_chain/spec/datatypes/altair.nim
@@ -34,7 +34,7 @@ type
 
 static:
   # Verify that ordinals follow spec values (the spec uses these as shifts for bit flags)
-  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-alpha.3/specs/altair/beacon-chain.md#participation-flag-indices
+  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.4/specs/altair/beacon-chain.md#participation-flag-indices
   doAssert ord(TIMELY_SOURCE_FLAG_INDEX) == 0
   doAssert ord(TIMELY_TARGET_FLAG_INDEX) == 1
   doAssert ord(TIMELY_HEAD_FLAG_INDEX) == 2
@@ -138,13 +138,13 @@ type
     signature*: ValidatorSig
       ## Signature by the validator(s) over the block root of `slot`
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/altair/validator.md#contributionandproof
+  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.4/specs/altair/validator.md#contributionandproof
   ContributionAndProof* = object
     aggregator_index*: uint64 # `ValidatorIndex` after validation
     contribution*: SyncCommitteeContribution
     selection_proof*: ValidatorSig
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/altair/validator.md#signedcontributionandproof
+  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.4/specs/altair/validator.md#signedcontributionandproof
   SignedContributionAndProof* = object
     message*: ContributionAndProof
     signature*: ValidatorSig
diff --git a/beacon_chain/spec/datatypes/base.nim b/beacon_chain/spec/datatypes/base.nim
index c7fe91a775..0645017721 100644
--- a/beacon_chain/spec/datatypes/base.nim
+++ b/beacon_chain/spec/datatypes/base.nim
@@ -413,7 +413,7 @@ type
     aggregate*: Attestation
     selection_proof*: ValidatorSig
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/phase0/validator.md#signedaggregateandproof
+  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.4/specs/phase0/validator.md#signedaggregateandproof
   SignedAggregateAndProof* = object
     message*: AggregateAndProof
     signature*: ValidatorSig
diff --git a/beacon_chain/spec/datatypes/bellatrix.nim b/beacon_chain/spec/datatypes/bellatrix.nim
index 9d6b06df59..958ba39ac7 100644
--- a/beacon_chain/spec/datatypes/bellatrix.nim
+++ b/beacon_chain/spec/datatypes/bellatrix.nim
@@ -97,7 +97,7 @@ type
   ExecutePayload* = proc(
     execution_payload: ExecutionPayload): bool {.gcsafe, raises: [].}
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/bellatrix/fork-choice.md#powblock
+  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.4/specs/bellatrix/fork-choice.md#powblock
   PowBlock* = object
     block_hash*: Eth2Digest
     parent_hash*: Eth2Digest
diff --git a/beacon_chain/spec/datatypes/constants.nim b/beacon_chain/spec/datatypes/constants.nim
index 630f86a103..1cd085fb6c 100644
--- a/beacon_chain/spec/datatypes/constants.nim
+++ b/beacon_chain/spec/datatypes/constants.nim
@@ -75,5 +75,5 @@ const
   GOSSIP_MAX_SIZE* = 10'u64 * 1024 * 1024 # bytes
   MAX_CHUNK_SIZE* = 10'u64 * 1024 * 1024 # bytes
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.2/specs/deneb/p2p-interface.md#configuration
+  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.4/specs/deneb/p2p-interface.md#configuration
   MAX_REQUEST_BLOCKS_DENEB*: uint64 = 128 # TODO Make use of in request code
diff --git a/beacon_chain/spec/datatypes/deneb.nim b/beacon_chain/spec/datatypes/deneb.nim
index a89cf0a30e..465181cde3 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/v1.3.0/specs/deneb/polynomial-commitments.md#constants
+  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.4/specs/deneb/polynomial-commitments.md#constants
   BLS_MODULUS* = "52435875175126190479447740508185965837690552500527637822603658699938581184513".u256
 
 type
@@ -47,7 +47,7 @@ type
   # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.3/specs/deneb/beacon-chain.md#custom-types
   BlobIndex* = uint64
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.2/specs/deneb/polynomial-commitments.md#custom-types
+  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.4/specs/deneb/polynomial-commitments.md#custom-types
   Blob* = array[BYTES_PER_FIELD_ELEMENT * FIELD_ELEMENTS_PER_BLOB, byte]
 
   # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.4/specs/deneb/p2p-interface.md#blobsidecar
@@ -108,7 +108,7 @@ type
     blockValue*: Wei
     blobsBundle*: BlobsBundle
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.3/specs/deneb/beacon-chain.md#executionpayloadheader
+  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.4/specs/deneb/beacon-chain.md#executionpayloadheader
   ExecutionPayloadHeader* = object
     # Execution block header fields
     parent_hash*: Eth2Digest
diff --git a/beacon_chain/spec/datatypes/phase0.nim b/beacon_chain/spec/datatypes/phase0.nim
index 2bbd446b7b..f2dc4e42ba 100644
--- a/beacon_chain/spec/datatypes/phase0.nim
+++ b/beacon_chain/spec/datatypes/phase0.nim
@@ -73,7 +73,7 @@ type
     current_justified_checkpoint*: Checkpoint
     finalized_checkpoint*: Checkpoint
 
-  # 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.4/specs/phase0/beacon-chain.md#get_total_balance
   TotalBalances* = object
     # The total effective balance of all active validators during the _current_
     # epoch.
diff --git a/beacon_chain/spec/forks_light_client.nim b/beacon_chain/spec/forks_light_client.nim
index 090e54a2d3..f1cc7f78fa 100644
--- a/beacon_chain/spec/forks_light_client.nim
+++ b/beacon_chain/spec/forks_light_client.nim
@@ -828,7 +828,7 @@ func migratingToDataFork*[
   upgradedObject.migrateToDataFork(newKind)
   upgradedObject
 
-# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.3/specs/altair/light-client/full-node.md#block_to_light_client_header
+# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.4/specs/altair/light-client/full-node.md#block_to_light_client_header
 func toAltairLightClientHeader(
     blck:  # `SomeSignedBeaconBlock` doesn't work here (Nim 1.6)
       phase0.SignedBeaconBlock | phase0.TrustedSignedBeaconBlock |
diff --git a/beacon_chain/spec/helpers.nim b/beacon_chain/spec/helpers.nim
index 2c50976ece..774e6a3ea1 100644
--- a/beacon_chain/spec/helpers.nim
+++ b/beacon_chain/spec/helpers.nim
@@ -74,7 +74,7 @@ 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/v1.4.0-alpha.3/specs/phase0/beacon-chain.md#get_active_validator_indices
+# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.4/specs/phase0/beacon-chain.md#get_active_validator_indices
 iterator get_active_validator_indices*(state: ForkyBeaconState, epoch: Epoch):
     ValidatorIndex =
   for vidx in state.validators.vindices:
diff --git a/beacon_chain/spec/network.nim b/beacon_chain/spec/network.nim
index 99c24f707d..73bae365cc 100644
--- a/beacon_chain/spec/network.nim
+++ b/beacon_chain/spec/network.nim
@@ -105,7 +105,7 @@ func getBlobSidecarTopic*(forkDigest: ForkDigest,
                           subnet_id: BlobId): string =
   eth2Prefix(forkDigest) & "blob_sidecar_" & $subnet_id & "/ssz_snappy"
 
-# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.3/specs/deneb/validator.md#sidecar
+# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.4/specs/deneb/validator.md#sidecar
 func compute_subnet_for_blob_sidecar*(blob_index: BlobIndex): BlobId =
   BlobId(blob_index mod BLOB_SIDECAR_SUBNET_COUNT)
 
@@ -212,7 +212,7 @@ func getSyncSubnets*(
     if not nodeHasPubkey(pubkey):
       continue
 
-    # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/altair/validator.md#broadcast-sync-committee-message
+    # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.4/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/signatures.nim b/beacon_chain/spec/signatures.nim
index fef88e1fdb..3c9e12cecc 100644
--- a/beacon_chain/spec/signatures.nim
+++ b/beacon_chain/spec/signatures.nim
@@ -145,7 +145,7 @@ func compute_attestation_signing_root*(
       fork, DOMAIN_BEACON_ATTESTER, epoch, genesis_validators_root)
   compute_signing_root(attestation_data, domain)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.3/specs/phase0/validator.md#aggregate-signature
+# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.4/specs/phase0/validator.md#aggregate-signature
 func get_attestation_signature*(
     fork: Fork, genesis_validators_root: Eth2Digest,
     attestation_data: AttestationData,
@@ -301,7 +301,7 @@ proc verify_sync_committee_selection_proof*(
 
     blsVerify(pubkey, signing_root.data, signature)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/altair/validator.md#signature
+# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.4/specs/altair/validator.md#signature
 func compute_contribution_and_proof_signing_root*(
     fork: Fork, genesis_validators_root: Eth2Digest,
     msg: ContributionAndProof): Eth2Digest =
diff --git a/beacon_chain/spec/state_transition.nim b/beacon_chain/spec/state_transition.nim
index 22909d152b..5e99b08580 100644
--- a/beacon_chain/spec/state_transition.nim
+++ b/beacon_chain/spec/state_transition.nim
@@ -460,7 +460,7 @@ proc makeBeaconBlock*(
             transactions_root.get
 
           when executionPayload is deneb.ExecutionPayloadForSigning:
-            # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/deneb/beacon-chain.md#beaconblockbody
+            # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.4/specs/deneb/beacon-chain.md#beaconblockbody
             forkyState.data.latest_block_header.body_root = hash_tree_root(
               [hash_tree_root(randao_reveal),
                hash_tree_root(eth1_data),
diff --git a/beacon_chain/spec/state_transition_block.nim b/beacon_chain/spec/state_transition_block.nim
index bda4684d49..1ed4d69457 100644
--- a/beacon_chain/spec/state_transition_block.nim
+++ b/beacon_chain/spec/state_transition_block.nim
@@ -8,7 +8,7 @@
 # State transition - block processing, as described in
 # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.4/specs/phase0/beacon-chain.md#block-processing
 # https://github.com/ethereum/consensus-specs/blob/v1.3.0/specs/altair/beacon-chain.md#block-processing
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0/specs/bellatrix/beacon-chain.md#block-processing
+# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.4/specs/bellatrix/beacon-chain.md#block-processing
 # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.4/specs/capella/beacon-chain.md#block-processing
 # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/deneb/beacon-chain.md#block-processing
 #
diff --git a/beacon_chain/spec/state_transition_epoch.nim b/beacon_chain/spec/state_transition_epoch.nim
index 96552eab7b..c1e46cdc77 100644
--- a/beacon_chain/spec/state_transition_epoch.nim
+++ b/beacon_chain/spec/state_transition_epoch.nim
@@ -1141,7 +1141,7 @@ func init*(
            deneb.BeaconState): T =
   init(result, state)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0/specs/altair/beacon-chain.md#epoch-processing
+# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.4/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 7e0c4ac511..52930fb52f 100644
--- a/beacon_chain/spec/validator.nim
+++ b/beacon_chain/spec/validator.nim
@@ -455,7 +455,7 @@ func get_beacon_proposer_index*(state: ForkedHashedBeaconState,
   withState(state):
     get_beacon_proposer_index(forkyState.data, cache, slot)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.3/specs/phase0/validator.md#aggregation-selection
+# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.4/specs/phase0/validator.md#aggregation-selection
 func is_aggregator*(committee_len: uint64, slot_signature: ValidatorSig): bool =
   let modulo = max(1'u64, committee_len div TARGET_AGGREGATORS_PER_COMMITTEE)
   bytes_to_uint64(eth2digest(
diff --git a/beacon_chain/validators/beacon_validators.nim b/beacon_chain/validators/beacon_validators.nim
index 8c434bb121..6d7c28aa0e 100644
--- a/beacon_chain/validators/beacon_validators.nim
+++ b/beacon_chain/validators/beacon_validators.nim
@@ -1479,13 +1479,13 @@ proc signAndSendAggregate(
           return
         res.get()
 
-    # https://github.com/ethereum/consensus-specs/blob/v1.3.0/specs/phase0/validator.md#aggregation-selection
+    # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.4/specs/phase0/validator.md#aggregation-selection
     if not is_aggregator(
         shufflingRef, slot, committee_index, selectionProof):
       return
 
     # https://github.com/ethereum/consensus-specs/blob/v1.3.0/specs/phase0/validator.md#construct-aggregate
-    # https://github.com/ethereum/consensus-specs/blob/v1.3.0/specs/phase0/validator.md#aggregateandproof
+    # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.4/specs/phase0/validator.md#aggregateandproof
     var
       msg = SignedAggregateAndProof(
         message: AggregateAndProof(
diff --git a/beacon_chain/validators/slashing_protection_v2.nim b/beacon_chain/validators/slashing_protection_v2.nim
index f38928f815..a573331300 100644
--- a/beacon_chain/validators/slashing_protection_v2.nim
+++ b/beacon_chain/validators/slashing_protection_v2.nim
@@ -33,7 +33,7 @@ import
 # - 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-beta.3/specs/phase0/validator.md#how-to-avoid-slashing
+# - https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.4/specs/phase0/validator.md#how-to-avoid-slashing
 #
 # In-depth reading on slashing conditions
 #
diff --git a/beacon_chain/validators/validator_pool.nim b/beacon_chain/validators/validator_pool.nim
index 9730868253..0a3198cc1c 100644
--- a/beacon_chain/validators/validator_pool.nim
+++ b/beacon_chain/validators/validator_pool.nim
@@ -715,7 +715,7 @@ proc getSyncCommitteeSelectionProof*(v: AttachedValidator, fork: Fork,
       )
       await v.signData(request)
 
-# 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.4/specs/altair/validator.md#broadcast-sync-committee-contribution
 proc getContributionAndProofSignature*(v: AttachedValidator, fork: Fork,
                                        genesis_validators_root: Eth2Digest,
                                        contribution_and_proof: ContributionAndProof
@@ -731,7 +731,7 @@ proc getContributionAndProofSignature*(v: AttachedValidator, fork: Fork,
         fork, genesis_validators_root, contribution_and_proof)
       await v.signData(request)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0/specs/phase0/validator.md#randao-reveal
+# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.4/specs/phase0/validator.md#randao-reveal
 proc getEpochSignature*(v: AttachedValidator, fork: Fork,
                         genesis_validators_root: Eth2Digest, epoch: Epoch
                        ): Future[SignatureResult] {.async.} =
@@ -755,7 +755,7 @@ proc getEpochSignature*(v: AttachedValidator, fork: Fork,
   v.epochSignature = Opt.some((epoch, signature.get))
   signature
 
-# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/phase0/validator.md#aggregation-selection
+# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.4/specs/phase0/validator.md#aggregation-selection
 proc getSlotSignature*(v: AttachedValidator, fork: Fork,
                        genesis_validators_root: Eth2Digest, slot: Slot
                       ): Future[SignatureResult] {.async.} =
diff --git a/docs/block_flow.md b/docs/block_flow.md
index 29c07f326a..6fab28192a 100644
--- a/docs/block_flow.md
+++ b/docs/block_flow.md
@@ -115,7 +115,7 @@ Logs:
 
 ### Gossip flow out
 
-- After validation in `blockValidator()` in the Eth2Processor by `validateBeaconBlock()` according to spec https://github.com/ethereum/consensus-specs/blob/v1.4.0-alpha.3/specs/phase0/p2p-interface.md#beacon_block
+- After validation in `blockValidator()` in the Eth2Processor by `validateBeaconBlock()` according to spec https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.4/specs/phase0/p2p-interface.md#beacon_block
 - Important: P2P validation is not full verification (state transition and internal cryptographic signatures were not checked)
 - We jump into libp2p/protocols/pubsub/pubsub.nim in the method `validate(PubSub, message)`
 - which was called by `rpcHandler(GossipSub, PubSubPeer, RPCMsg)`
diff --git a/tests/consensus_spec/fixtures_utils.nim b/tests/consensus_spec/fixtures_utils.nim
index 4682378721..91818e7431 100644
--- a/tests/consensus_spec/fixtures_utils.nim
+++ b/tests/consensus_spec/fixtures_utils.nim
@@ -75,7 +75,7 @@ type
     rewards*: List[uint64, Limit VALIDATOR_REGISTRY_LIMIT]
     penalties*: List[uint64, Limit VALIDATOR_REGISTRY_LIMIT]
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.3/specs/phase0/validator.md#eth1block
+  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.4/specs/phase0/validator.md#eth1block
   Eth1Block* = object
     timestamp*: uint64
     deposit_root*: Eth2Digest