diff --git a/beacon_chain/consensus_object_pools/attestation_pool.nim b/beacon_chain/consensus_object_pools/attestation_pool.nim
index bdc599ee4..6994b58dc 100644
--- a/beacon_chain/consensus_object_pools/attestation_pool.nim
+++ b/beacon_chain/consensus_object_pools/attestation_pool.nim
@@ -557,7 +557,7 @@ proc getAttestationsForBlock*(pool: var AttestationPool,
                               cache: var StateCache): seq[Attestation] =
   ## Retrieve attestations that may be added to a new block at the slot of the
   ## given state
-  ## https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/phase0/validator.md#attestations
+  ## https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.4/specs/phase0/validator.md#attestations
   let newBlockSlot = state.data.slot.uint64
 
   if newBlockSlot < MIN_ATTESTATION_INCLUSION_DELAY:
diff --git a/beacon_chain/consensus_object_pools/block_dag.nim b/beacon_chain/consensus_object_pools/block_dag.nim
index b18c7daf5..1ec909ddc 100644
--- a/beacon_chain/consensus_object_pools/block_dag.nim
+++ b/beacon_chain/consensus_object_pools/block_dag.nim
@@ -134,7 +134,7 @@ func link*(parent, child: BlockRef) =
 func get_ancestor*(blck: BlockRef, slot: Slot,
     maxDepth = 100'i64 * 365 * 24 * 60 * 60 div SECONDS_PER_SLOT.int):
     BlockRef =
-  ## https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.3/specs/phase0/fork-choice.md#get_ancestor
+  ## https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.4/specs/phase0/fork-choice.md#get_ancestor
   ## Return the most recent block as of the time at `slot` that not more recent
   ## than `blck` itself
   if isNil(blck): return nil
diff --git a/beacon_chain/consensus_object_pools/spec_cache.nim b/beacon_chain/consensus_object_pools/spec_cache.nim
index 6e8292cdb..b811aea8f 100644
--- a/beacon_chain/consensus_object_pools/spec_cache.nim
+++ b/beacon_chain/consensus_object_pools/spec_cache.nim
@@ -198,7 +198,7 @@ func makeAttestationData*(
       epoch: current_epoch,
       root: epoch_boundary_block.blck.root))
 
-# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.3/specs/phase0/validator.md#validator-assignments
+# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.4/specs/phase0/validator.md#validator-assignments
 iterator get_committee_assignments*(
     shufflingRef: ShufflingRef, validator_indices: HashSet[ValidatorIndex]):
     tuple[committee_index: CommitteeIndex,
diff --git a/beacon_chain/libnimbus_lc/libnimbus_lc.h b/beacon_chain/libnimbus_lc/libnimbus_lc.h
index 39394c984..5ea543c78 100644
--- a/beacon_chain/libnimbus_lc/libnimbus_lc.h
+++ b/beacon_chain/libnimbus_lc/libnimbus_lc.h
@@ -153,7 +153,7 @@ typedef struct ETHBeaconState ETHBeaconState;
  * @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.4/specs/capella/beacon-chain.md#beaconstate
- * @see https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.3/configs/README.md
+ * @see https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.4/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.2/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
  */
 void ETHRootDestroy(ETHRoot *root);
 
@@ -322,7 +322,7 @@ typedef struct ETHLightClientStore ETHLightClientStore;
  *
  * @see https://ethereum.github.io/beacon-APIs/?urls.primaryName=v2.4.1#/Beacon/getLightClientBootstrap
  * @see https://ethereum.github.io/beacon-APIs/?urls.primaryName=v2.4.1#/Events/eventstream
- * @see https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/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
  * @see https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.0/specs/phase0/weak-subjectivity.md#weak-subjectivity-period
  */
 ETH_RESULT_USE_CHECK
@@ -594,7 +594,7 @@ 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.4/specs/altair/light-client/sync-protocol.md#is_next_sync_committee_known
  * @see https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.4/specs/altair/light-client/light-client.md
  */
 ETH_RESULT_USE_CHECK
@@ -669,7 +669,7 @@ void ETHLightClientHeaderDestroy(ETHLightClientHeader *header);
  *
  * @return Pointer to a copy of the given header's beacon block root.
  *
- * @see https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.3/specs/phase0/beacon-chain.md#hash_tree_root
+ * @see https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.4/specs/phase0/beacon-chain.md#hash_tree_root
  */
 ETH_RESULT_USE_CHECK
 ETHRoot *ETHLightClientHeaderCopyBeaconRoot(
diff --git a/beacon_chain/libnimbus_lc/libnimbus_lc.nim b/beacon_chain/libnimbus_lc/libnimbus_lc.nim
index 05a2dc966..a946644ee 100644
--- a/beacon_chain/libnimbus_lc/libnimbus_lc.nim
+++ b/beacon_chain/libnimbus_lc/libnimbus_lc.nim
@@ -947,7 +947,7 @@ proc ETHLightClientHeaderCopyExecutionHash(
   ## * Pointer to a copy of the given header's execution block hash.
   ##
   ## See:
-  ## * https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/deneb/beacon-chain.md#executionpayloadheader
+  ## * https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.4/specs/deneb/beacon-chain.md#executionpayloadheader
   discard cfg  # Future-proof against SSZ execution block header, EIP-6404ff.
   let root = Eth2Digest.new()
   root[] = header[].execution.block_hash
@@ -972,7 +972,7 @@ func ETHLightClientHeaderGetExecution(
   ## * Execution payload header.
   ##
   ## See:
-  ## * https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/deneb/beacon-chain.md#executionpayloadheader
+  ## * https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.4/specs/deneb/beacon-chain.md#executionpayloadheader
   addr header[].execution
 
 func ETHExecutionPayloadHeaderGetParentHash(
diff --git a/beacon_chain/networking/eth2_network.nim b/beacon_chain/networking/eth2_network.nim
index 243cdb9ea..1db174ecb 100644
--- a/beacon_chain/networking/eth2_network.nim
+++ b/beacon_chain/networking/eth2_network.nim
@@ -2244,7 +2244,7 @@ proc getPersistentNetKeys*(
 
 func gossipId(
     data: openArray[byte], phase0Prefix, topic: string): seq[byte] =
-  # 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/v1.4.0-beta.4/specs/phase0/p2p-interface.md#topics-and-messages
   # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.4/specs/altair/p2p-interface.md#topics-and-messages
   const MESSAGE_DOMAIN_VALID_SNAPPY = [0x01'u8, 0x00, 0x00, 0x00]
   let messageDigest = withEth2Hash:
@@ -2524,7 +2524,7 @@ proc broadcast(node: Eth2Node, topic: string, msg: auto):
 
 proc subscribeAttestationSubnets*(
     node: Eth2Node, subnets: AttnetBits, forkDigest: ForkDigest) =
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0/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
 
diff --git a/beacon_chain/nimbus_beacon_node.nim b/beacon_chain/nimbus_beacon_node.nim
index 6aaadf4a5..d725374ad 100644
--- a/beacon_chain/nimbus_beacon_node.nim
+++ b/beacon_chain/nimbus_beacon_node.nim
@@ -1650,7 +1650,7 @@ proc installMessageValidators(node: BeaconNode) =
                 MsgSource.gossip, signedBlock)))
 
       # beacon_attestation_{subnet_id}
-      # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/phase0/p2p-interface.md#beacon_attestation_subnet_id
+      # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.4/specs/phase0/p2p-interface.md#beacon_attestation_subnet_id
       for it in SubnetId:
         closureScope:  # Needed for inner `proc`; don't lift it out of loop.
           let subnet_id = it
diff --git a/beacon_chain/spec/beacon_time.nim b/beacon_chain/spec/beacon_time.nim
index 6fa5b7640..cf4fd9b00 100644
--- a/beacon_chain/spec/beacon_time.nim
+++ b/beacon_chain/spec/beacon_time.nim
@@ -182,7 +182,7 @@ func slotOrZero*(time: BeaconTime): Slot =
   if exSlot.afterGenesis: exSlot.slot
   else: Slot(0)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.4.0-alpha.3/specs/phase0/beacon-chain.md#compute_epoch_at_slot
+# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.4/specs/phase0/beacon-chain.md#compute_epoch_at_slot
 func epoch*(slot: Slot): Epoch = # aka compute_epoch_at_slot
   ## Return the epoch number at ``slot``.
   if slot == FAR_FUTURE_SLOT: FAR_FUTURE_EPOCH
diff --git a/beacon_chain/spec/datatypes/altair.nim b/beacon_chain/spec/datatypes/altair.nim
index b1d6d57f2..04a16f6cd 100644
--- a/beacon_chain/spec/datatypes/altair.nim
+++ b/beacon_chain/spec/datatypes/altair.nim
@@ -51,7 +51,7 @@ const
   PARTICIPATION_FLAG_WEIGHTS*: array[TimelyFlag, uint64] =
     [uint64 TIMELY_SOURCE_WEIGHT, TIMELY_TARGET_WEIGHT, TIMELY_HEAD_WEIGHT]
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/altair/validator.md#misc
+  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.4/specs/altair/validator.md#misc
   TARGET_AGGREGATORS_PER_SYNC_SUBCOMMITTEE* = 16
   SYNC_COMMITTEE_SUBNET_COUNT* = 4
 
@@ -149,7 +149,7 @@ type
     message*: ContributionAndProof
     signature*: ValidatorSig
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/altair/validator.md#syncaggregatorselectiondata
+  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.4/specs/altair/validator.md#syncaggregatorselectiondata
   SyncAggregatorSelectionData* = object
     slot*: Slot
     subcommittee_index*: uint64 # `SyncSubcommitteeIndex` after validation
diff --git a/beacon_chain/spec/datatypes/base.nim b/beacon_chain/spec/datatypes/base.nim
index b3d4e2467..93a875b57 100644
--- a/beacon_chain/spec/datatypes/base.nim
+++ b/beacon_chain/spec/datatypes/base.nim
@@ -407,7 +407,7 @@ type
     message*: BeaconBlockHeader
     signature*: TrustedSig
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/phase0/validator.md#aggregateandproof
+  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.4/specs/phase0/validator.md#aggregateandproof
   AggregateAndProof* = object
     aggregator_index*: uint64 # `ValidatorIndex` after validation
     aggregate*: Attestation
diff --git a/beacon_chain/spec/datatypes/capella.nim b/beacon_chain/spec/datatypes/capella.nim
index 83c89ac99..624133ad9 100644
--- a/beacon_chain/spec/datatypes/capella.nim
+++ b/beacon_chain/spec/datatypes/capella.nim
@@ -441,7 +441,7 @@ type
     # Capella operations
     bls_to_execution_changes*: SignedBLSToExecutionChangeList  # [New in Capella]
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-alpha.3/specs/phase0/beacon-chain.md#signedbeaconblock
+  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.4/specs/phase0/beacon-chain.md#signedbeaconblock
   SignedBeaconBlock* = object
     message*: BeaconBlock
     signature*: ValidatorSig
diff --git a/beacon_chain/spec/datatypes/constants.nim b/beacon_chain/spec/datatypes/constants.nim
index 1cd085fb6..2db803e07 100644
--- a/beacon_chain/spec/datatypes/constants.nim
+++ b/beacon_chain/spec/datatypes/constants.nim
@@ -62,7 +62,7 @@ const
   REORG_PARENT_WEIGHT_THRESHOLD*: uint64 = 160
   REORG_MAX_EPOCHS_SINCE_FINALIZATION* = Epoch(2)
 
-  # 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
   BLOB_SIDECAR_SUBNET_COUNT*: uint64 = 6
 
   # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/phase0/p2p-interface.md#configuration
diff --git a/beacon_chain/spec/datatypes/deneb.nim b/beacon_chain/spec/datatypes/deneb.nim
index 465181cde..26d1369d6 100644
--- a/beacon_chain/spec/datatypes/deneb.nim
+++ b/beacon_chain/spec/datatypes/deneb.nim
@@ -44,7 +44,7 @@ type
   # current spec doesn't ever SSZ-serialize it or hash_tree_root it
   VersionedHash* = array[32, byte]
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.3/specs/deneb/beacon-chain.md#custom-types
+  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.4/specs/deneb/beacon-chain.md#custom-types
   BlobIndex* = uint64
 
   # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.4/specs/deneb/polynomial-commitments.md#custom-types
diff --git a/beacon_chain/spec/signatures.nim b/beacon_chain/spec/signatures.nim
index 3c9e12cec..b85886550 100644
--- a/beacon_chain/spec/signatures.nim
+++ b/beacon_chain/spec/signatures.nim
@@ -117,7 +117,7 @@ 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/v1.4.0-beta.3/specs/phase0/validator.md#broadcast-aggregate
+# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.4/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 =
diff --git a/beacon_chain/spec/state_transition_epoch.nim b/beacon_chain/spec/state_transition_epoch.nim
index c1e46cdc7..351b8ff9d 100644
--- a/beacon_chain/spec/state_transition_epoch.nim
+++ b/beacon_chain/spec/state_transition_epoch.nim
@@ -666,7 +666,7 @@ func get_active_increments*(
 
 # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.4/specs/altair/beacon-chain.md#get_flag_index_deltas
 # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.4/specs/altair/beacon-chain.md#modified-get_inactivity_penalty_deltas
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0/specs/bellatrix/beacon-chain.md#modified-get_inactivity_penalty_deltas
+# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.4/specs/bellatrix/beacon-chain.md#modified-get_inactivity_penalty_deltas
 # Combines get_flag_index_deltas() and get_inactivity_penalty_deltas()
 iterator get_flag_and_inactivity_deltas*(
     cfg: RuntimeConfig,
@@ -893,7 +893,7 @@ func get_adjusted_total_slashing_balance*(
       {.fatal: "process_slashings: incorrect BeaconState type".}
   min(sum(state.slashings.data) * multiplier, total_balance)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.4.0-alpha.3/specs/phase0/beacon-chain.md#slashings
+# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.4/specs/phase0/beacon-chain.md#slashings
 # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.4/specs/altair/beacon-chain.md#slashings
 # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.4/specs/bellatrix/beacon-chain.md#slashings
 func slashing_penalty_applies*(validator: Validator, epoch: Epoch): bool =
@@ -1000,7 +1000,7 @@ func process_historical_roots_update*(state: var ForkyBeaconState) =
     if not state.historical_roots.add state.compute_historical_root():
       raiseAssert "no more room for historical roots, so long and thanks for the fish!"
 
-# https://github.com/ethereum/consensus-specs/blob/v1.4.0-alpha.3/specs/phase0/beacon-chain.md#participation-records-rotation
+# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.4/specs/phase0/beacon-chain.md#participation-records-rotation
 func process_participation_record_updates*(state: var phase0.BeaconState) =
   # Rotate current/previous epoch attestations - using swap avoids copying all
   # elements using a slow genericSeqAssign
diff --git a/beacon_chain/sync/sync_protocol.nim b/beacon_chain/sync/sync_protocol.nim
index 02ae89caf..df67ef5b8 100644
--- a/beacon_chain/sync/sync_protocol.nim
+++ b/beacon_chain/sync/sync_protocol.nim
@@ -281,7 +281,7 @@ p2pProtocol BeaconSync(version = 1,
     {.libp2pProtocol("ping", 1, isRequired = true).} =
     return peer.network.metadata.seq_number
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/altair/p2p-interface.md#transitioning-from-v1-to-v2
+  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.4/specs/altair/p2p-interface.md#transitioning-from-v1-to-v2
   proc getMetaData(peer: Peer): uint64
     {.libp2pProtocol("metadata", 1, isRequired = true).} =
     raise newException(InvalidInputsError, "GetMetaData v1 unsupported")
diff --git a/beacon_chain/validators/beacon_validators.nim b/beacon_chain/validators/beacon_validators.nim
index 6303d85e9..6d2183438 100644
--- a/beacon_chain/validators/beacon_validators.nim
+++ b/beacon_chain/validators/beacon_validators.nim
@@ -1235,7 +1235,7 @@ proc handleAttestations(node: BeaconNode, head: BlockRef, slot: Slot) =
   # We need to run attestations exactly for the slot that we're attesting to.
   # In case blocks went missing, this means advancing past the latest block
   # using empty slots as fillers.
-  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/phase0/validator.md#validator-assignments
+  # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.4/specs/phase0/validator.md#validator-assignments
   let
     epochRef = node.dag.getEpochRef(
       attestationHead.blck, slot.epoch, false).valueOr:
diff --git a/beacon_chain/validators/validator_pool.nim b/beacon_chain/validators/validator_pool.nim
index 0a3198cc1..63b0e976d 100644
--- a/beacon_chain/validators/validator_pool.nim
+++ b/beacon_chain/validators/validator_pool.nim
@@ -489,7 +489,7 @@ proc signData(v: AttachedValidator,
   else:
     v.signWithDistributedKey(request)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.3/specs/phase0/validator.md#signature
+# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.4/specs/phase0/validator.md#signature
 proc getBlockSignature*(v: AttachedValidator, fork: Fork,
                         genesis_validators_root: Eth2Digest, slot: Slot,
                         block_root: Eth2Digest,
@@ -629,7 +629,7 @@ proc getBlockSignature*(v: AttachedValidator, fork: Fork,
                 proofs)
       await v.signData(web3signerRequest)
 
-# 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
 proc getAttestationSignature*(v: AttachedValidator, fork: Fork,
                               genesis_validators_root: Eth2Digest,
                               data: AttestationData
@@ -645,7 +645,7 @@ proc getAttestationSignature*(v: AttachedValidator, fork: Fork,
       let request = Web3SignerRequest.init(fork, genesis_validators_root, data)
       await v.signData(request)
 
-# 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-beta.4/specs/phase0/validator.md#broadcast-aggregate
 proc getAggregateAndProofSignature*(v: AttachedValidator,
                                     fork: Fork,
                                     genesis_validators_root: Eth2Digest,
diff --git a/docs/block_flow.md b/docs/block_flow.md
index 6fab28192..b56611875 100644
--- a/docs/block_flow.md
+++ b/docs/block_flow.md
@@ -6,7 +6,7 @@ This is a WIP document to explain the beacon block flows.
 
 Important distinction:
 - We distinguish block `validation` which is defined in the P2P specs:
-  https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.1/specs/phase0/p2p-interface.md#beacon_block.
+  https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.4/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.4/specs/phase0/beacon-chain.md#block-processing
@@ -103,7 +103,7 @@ It is important to note that 3 data structures are sharing the same `AsyncQueue[
 Blocks are listened to via the gossipsub topic `/eth2/{$forkDigest}/beacon_block/ssz_snappy` (`topicBeaconBlocks` variable)
 
 They are then:
-- validated by `blockValidator()` in the Eth2Processor by `validateBeaconBlock()` according to spec https://github.com/ethereum/consensus-specs/blob/v1.3.0/specs/phase0/p2p-interface.md#beacon_block
+- validated by `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)
 - enqueued in the shared block queue `AsyncQueue[BlockEntry]` in case of success
 - dropped in case of error