diff --git a/beacon_chain/beacon_chain_db_immutable.nim b/beacon_chain/beacon_chain_db_immutable.nim
index 358ab2694..bc1bcfda3 100644
--- a/beacon_chain/beacon_chain_db_immutable.nim
+++ b/beacon_chain/beacon_chain_db_immutable.nim
@@ -69,7 +69,7 @@ type
     current_justified_checkpoint*: Checkpoint
     finalized_checkpoint*: Checkpoint
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0/specs/altair/beacon-chain.md#beaconstate
+  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-alpha.3/specs/altair/beacon-chain.md#beaconstate
   # Memory-representation-equivalent to an Altair BeaconState for in-place SSZ
   # reading and writing
   AltairBeaconStateNoImmutableValidators* = object
diff --git a/beacon_chain/fork_choice/fork_choice.nim b/beacon_chain/fork_choice/fork_choice.nim
index be3a2e0ec..7638fdd98 100644
--- a/beacon_chain/fork_choice/fork_choice.nim
+++ b/beacon_chain/fork_choice/fork_choice.nim
@@ -350,7 +350,7 @@ func find_head*(
 
   return ok(new_head)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0/specs/phase0/fork-choice.md#get_head
+# https://github.com/ethereum/consensus-specs/blob/v1.4.0-alpha.3/specs/phase0/fork-choice.md#get_head
 proc get_head*(self: var ForkChoice,
                dag: ChainDAGRef,
                wallTime: BeaconTime): FcResult[Eth2Digest] =
diff --git a/beacon_chain/fork_choice/proto_array.nim b/beacon_chain/fork_choice/proto_array.nim
index 388050290..b74802b95 100644
--- a/beacon_chain/fork_choice/proto_array.nim
+++ b/beacon_chain/fork_choice/proto_array.nim
@@ -190,7 +190,7 @@ 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/v1.3.0/specs/phase0/fork-choice.md#get_weight
+    # https://github.com/ethereum/consensus-specs/blob/v1.4.0-alpha.3/specs/phase0/fork-choice.md#get_weight
     if (not proposerBoostRoot.isZero) and proposerBoostRoot == node.bid.root:
       proposerBoostScore = calculateProposerBoost(newBalances)
       if  nodeDelta >= 0 and
diff --git a/beacon_chain/gossip_processing/README.md b/beacon_chain/gossip_processing/README.md
index 8be7322fa..e0f40edf0 100644
--- a/beacon_chain/gossip_processing/README.md
+++ b/beacon_chain/gossip_processing/README.md
@@ -10,10 +10,10 @@ 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/v1.3.0/specs/phase0/p2p-interface.md#beacon_block
-- Attestations (aggregated): https://github.com/ethereum/consensus-specs/blob/v1.3.0/specs/phase0/p2p-interface.md#beacon_aggregate_and_proof
+- Attestations (aggregated): https://github.com/ethereum/consensus-specs/blob/v1.4.0-alpha.3/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/v1.3.0/specs/phase0/p2p-interface.md#voluntary_exit
-- Proposer slashings: https://github.com/ethereum/consensus-specs/blob/v1.3.0/specs/phase0/p2p-interface.md#proposer_slashing
+- Voluntary exits: https://github.com/ethereum/consensus-specs/blob/v1.4.0-alpha.3/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/v1.3.0/specs/phase0/p2p-interface.md#attester_slashing
 
 There are multiple consumers of validated consensus objects:
diff --git a/beacon_chain/gossip_processing/gossip_validation.nim b/beacon_chain/gossip_processing/gossip_validation.nim
index dc99b9590..6d8663ff4 100644
--- a/beacon_chain/gossip_processing/gossip_validation.nim
+++ b/beacon_chain/gossip_processing/gossip_validation.nim
@@ -1024,7 +1024,7 @@ proc validateVoluntaryExit*(
 
   ok()
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0/specs/altair/p2p-interface.md#sync_committee_subnet_id
+# https://github.com/ethereum/consensus-specs/blob/v1.4.0-alpha.3/specs/altair/p2p-interface.md#sync_committee_subnet_id
 proc validateSyncCommitteeMessage*(
     dag: ChainDAGRef,
     quarantine: ref Quarantine,
diff --git a/beacon_chain/networking/eth2_network.nim b/beacon_chain/networking/eth2_network.nim
index a31120162..a20c41f98 100644
--- a/beacon_chain/networking/eth2_network.nim
+++ b/beacon_chain/networking/eth2_network.nim
@@ -2537,7 +2537,7 @@ 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.1/specs/phase0/p2p-interface.md#metadata
+  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-alpha.3/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 528b18523..60d724595 100644
--- a/beacon_chain/nimbus_beacon_node.nim
+++ b/beacon_chain/nimbus_beacon_node.nim
@@ -1513,7 +1513,7 @@ proc installMessageValidators(node: BeaconNode) =
 
       when consensusFork >= ConsensusFork.Altair:
         # sync_committee_{subnet_id}
-        # https://github.com/ethereum/consensus-specs/blob/v1.3.0/specs/altair/p2p-interface.md#sync_committee_subnet_id
+        # https://github.com/ethereum/consensus-specs/blob/v1.4.0-alpha.3/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 f9367cff2..06c125aa2 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/v1.3.0/specs/phase0/fork-choice.md#constant
+  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-alpha.3/specs/phase0/fork-choice.md#constant
   INTERVALS_PER_SLOT* = 3
 
   FAR_FUTURE_BEACON_TIME* = BeaconTime(ns_since_genesis: int64.high())
diff --git a/beacon_chain/spec/beaconstate.nim b/beacon_chain/spec/beaconstate.nim
index aae152548..3716ca865 100644
--- a/beacon_chain/spec/beaconstate.nim
+++ b/beacon_chain/spec/beaconstate.nim
@@ -152,7 +152,7 @@ func get_slashing_penalty*(state: ForkyBeaconState,
 
 # 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-alpha.3/specs/bellatrix/beacon-chain.md#modified-slash_validator
 func get_whistleblower_reward*(validator_effective_balance: Gwei): Gwei =
   validator_effective_balance div WHISTLEBLOWER_REWARD_QUOTIENT
 
diff --git a/beacon_chain/spec/datatypes/altair.nim b/beacon_chain/spec/datatypes/altair.nim
index 4d29f8d63..e8d2dd3c7 100644
--- a/beacon_chain/spec/datatypes/altair.nim
+++ b/beacon_chain/spec/datatypes/altair.nim
@@ -57,7 +57,7 @@ const
   TIMELY_TARGET_FLAG_INDEX* = 1
   TIMELY_HEAD_FLAG_INDEX* = 2
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0/specs/altair/beacon-chain.md#inactivity-penalties
+  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-alpha.3/specs/altair/beacon-chain.md#inactivity-penalties
   INACTIVITY_SCORE_BIAS* = 4
   INACTIVITY_SCORE_RECOVERY_RATE* = 16
 
diff --git a/beacon_chain/spec/datatypes/capella.nim b/beacon_chain/spec/datatypes/capella.nim
index 17c0af5b8..f883645dc 100644
--- a/beacon_chain/spec/datatypes/capella.nim
+++ b/beacon_chain/spec/datatypes/capella.nim
@@ -45,7 +45,7 @@ type
     address*: ExecutionAddress
     amount*: Gwei
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0/specs/capella/beacon-chain.md#blstoexecutionchange
+  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-alpha.3/specs/capella/beacon-chain.md#blstoexecutionchange
   BLSToExecutionChange* = object
     validator_index*: uint64
     from_bls_pubkey*: ValidatorPubKey
@@ -220,7 +220,7 @@ type
       ## (used to compute safety threshold)
     current_max_active_participants*: uint64
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0/specs/capella/beacon-chain.md#beaconstate
+  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-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 b9e2edb86..4696bed8e 100644
--- a/beacon_chain/spec/datatypes/constants.nim
+++ b/beacon_chain/spec/datatypes/constants.nim
@@ -31,7 +31,7 @@ const
   DOMAIN_AGGREGATE_AND_PROOF* = DomainType([byte 0x06, 0x00, 0x00, 0x00])
   DOMAIN_APPLICATION_MASK* = DomainType([byte 0x00, 0x00, 0x00, 0x01])
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0/specs/altair/beacon-chain.md#domain-types
+  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-alpha.3/specs/altair/beacon-chain.md#domain-types
   DOMAIN_SYNC_COMMITTEE* = DomainType([byte 0x07, 0x00, 0x00, 0x00])
   DOMAIN_SYNC_COMMITTEE_SELECTION_PROOF* = DomainType([byte 0x08, 0x00, 0x00, 0x00])
   DOMAIN_CONTRIBUTION_AND_PROOF* = DomainType([byte 0x09, 0x00, 0x00, 0x00])
diff --git a/beacon_chain/spec/datatypes/deneb.nim b/beacon_chain/spec/datatypes/deneb.nim
index 159df3348..10d885ccf 100644
--- a/beacon_chain/spec/datatypes/deneb.nim
+++ b/beacon_chain/spec/datatypes/deneb.nim
@@ -30,7 +30,7 @@ from  ../../vendor/nim-kzg4844/kzg4844 import KzgCommitment, KzgProof
 export json_serialization, base, kzg4844
 
 const
-  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-alpha.1/specs/deneb/polynomial-commitments.md#constants
+  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-alpha.3/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
@@ -38,7 +38,8 @@ const
 
   # https://github.com/ethereum/consensus-specs/blob/v1.3.0/specs/deneb/polynomial-commitments.md#constants
   BLS_MODULUS* = "52435875175126190479447740508185965837690552500527637822603658699938581184513".u256
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0/specs/deneb/p2p-interface.md#configuration
+
+  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-alpha.3/specs/deneb/p2p-interface.md#configuration
   MIN_EPOCHS_FOR_BLOB_SIDECARS_REQUESTS* = 4096'u64
 
 type
@@ -678,7 +679,7 @@ 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-alpha.1/specs/deneb/light-client/fork.md#upgrading-light-client-data
+# https://github.com/ethereum/consensus-specs/blob/v1.4.0-alpha.3/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/presets.nim b/beacon_chain/spec/presets.nim
index f60b34954..a57de9021 100644
--- a/beacon_chain/spec/presets.nim
+++ b/beacon_chain/spec/presets.nim
@@ -612,7 +612,7 @@ template name*(cfg: RuntimeConfig): string =
   else:
     const_preset
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0/specs/phase0/p2p-interface.md#configuration
+# https://github.com/ethereum/consensus-specs/blob/v1.4.0-alpha.3/specs/phase0/p2p-interface.md#configuration
 func MIN_EPOCHS_FOR_BLOCK_REQUESTS*(cfg: RuntimeConfig): uint64 =
   cfg.MIN_VALIDATOR_WITHDRAWABILITY_DELAY + cfg.CHURN_LIMIT_QUOTIENT div 2
 
diff --git a/beacon_chain/spec/signatures.nim b/beacon_chain/spec/signatures.nim
index a47d2fe78..0759f5296 100644
--- a/beacon_chain/spec/signatures.nim
+++ b/beacon_chain/spec/signatures.nim
@@ -138,7 +138,7 @@ func compute_aggregate_and_proof_signing_root*(
       fork, DOMAIN_AGGREGATE_AND_PROOF, epoch, genesis_validators_root)
   compute_signing_root(aggregate_and_proof, domain)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0/specs/phase0/validator.md#broadcast-aggregate
+# https://github.com/ethereum/consensus-specs/blob/v1.4.0-alpha.3/specs/phase0/validator.md#broadcast-aggregate
 func get_aggregate_and_proof_signature*(fork: Fork, genesis_validators_root: Eth2Digest,
                                         aggregate_and_proof: AggregateAndProof,
                                         privkey: ValidatorPrivKey): CookedSig =
@@ -380,7 +380,7 @@ proc verify_builder_signature*(
   let signing_root = compute_builder_signing_root(fork, msg)
   blsVerify(pubkey, signing_root.data, signature)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0/specs/capella/beacon-chain.md#new-process_bls_to_execution_change
+# https://github.com/ethereum/consensus-specs/blob/v1.4.0-alpha.3/specs/capella/beacon-chain.md#new-process_bls_to_execution_change
 func compute_bls_to_execution_change_signing_root*(
     genesisFork: Fork, genesis_validators_root: Eth2Digest,
     msg: BLSToExecutionChange): Eth2Digest =
diff --git a/beacon_chain/spec/state_transition.nim b/beacon_chain/spec/state_transition.nim
index cd0654f91..409e8563a 100644
--- a/beacon_chain/spec/state_transition.nim
+++ b/beacon_chain/spec/state_transition.nim
@@ -420,7 +420,7 @@ template partialBeaconBlock*(
       sync_aggregate: sync_aggregate,
       execution_payload: execution_payload.executionPayload))
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0/specs/capella/validator.md#block-proposal
+# https://github.com/ethereum/consensus-specs/blob/v1.4.0-alpha.3/specs/capella/validator.md#block-proposal
 template partialBeaconBlock*(
     cfg: RuntimeConfig,
     state: var capella.HashedBeaconState,
@@ -537,7 +537,7 @@ proc makeBeaconBlock*(
           forkyState.data.latest_execution_payload_header.transactions_root =
             transactions_root.get
 
-          # https://github.com/ethereum/consensus-specs/blob/v1.3.0/specs/bellatrix/beacon-chain.md#beaconblockbody
+          # https://github.com/ethereum/consensus-specs/blob/v1.4.0-alpha.3/specs/bellatrix/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_epoch.nim b/beacon_chain/spec/state_transition_epoch.nim
index 30ce7ef5b..e71312f8c 100644
--- a/beacon_chain/spec/state_transition_epoch.nim
+++ b/beacon_chain/spec/state_transition_epoch.nim
@@ -642,7 +642,7 @@ func get_base_reward_increment*(
     state.validators[index].effective_balance div EFFECTIVE_BALANCE_INCREMENT
   increments * base_reward_per_increment
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0/specs/altair/beacon-chain.md#get_flag_index_deltas
+# https://github.com/ethereum/consensus-specs/blob/v1.4.0-alpha.3/specs/altair/beacon-chain.md#get_flag_index_deltas
 func get_flag_index_reward*(
     state: altair.BeaconState | bellatrix.BeaconState | capella.BeaconState |
            deneb.BeaconState,
@@ -711,7 +711,7 @@ iterator get_flag_index_deltas*(
       else:
         (vidx, RewardDelta(rewards: 0.Gwei, penalties: 0.Gwei))
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0/specs/altair/beacon-chain.md#modified-get_inactivity_penalty_deltas
+# https://github.com/ethereum/consensus-specs/blob/v1.4.0-alpha.3/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) =
@@ -909,7 +909,7 @@ func get_slashing_penalty*(validator: Validator,
 
 # 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/v1.3.0/specs/bellatrix/beacon-chain.md#slashings
+# https://github.com/ethereum/consensus-specs/blob/v1.4.0-alpha.3/specs/bellatrix/beacon-chain.md#slashings
 func process_slashings*(state: var ForkyBeaconState, total_balance: Gwei) =
   let
     epoch = get_current_epoch(state)
@@ -1178,7 +1178,7 @@ proc process_epoch*(
 
   ok()
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0/specs/capella/beacon-chain.md#epoch-processing
+# https://github.com/ethereum/consensus-specs/blob/v1.4.0-alpha.3/specs/capella/beacon-chain.md#epoch-processing
 proc process_epoch*(
     cfg: RuntimeConfig,
     state: var (capella.BeaconState | deneb.BeaconState),
diff --git a/beacon_chain/validators/validator_pool.nim b/beacon_chain/validators/validator_pool.nim
index 045659471..12b41710f 100644
--- a/beacon_chain/validators/validator_pool.nim
+++ b/beacon_chain/validators/validator_pool.nim
@@ -437,7 +437,7 @@ proc signData(v: AttachedValidator,
   else:
     v.signWithDistributedKey(request)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0/specs/phase0/validator.md#signature
+# https://github.com/ethereum/consensus-specs/blob/v1.4.0-alpha.3/specs/phase0/validator.md#signature
 proc getBlockSignature*(v: AttachedValidator, fork: Fork,
                         genesis_validators_root: Eth2Digest, slot: Slot,
                         block_root: Eth2Digest,