diff --git a/specs/altair/beacon-chain.md b/specs/altair/beacon-chain.md
index b22f89a4d..3c7177a1b 100644
--- a/specs/altair/beacon-chain.md
+++ b/specs/altair/beacon-chain.md
@@ -685,7 +685,7 @@ This helper function is only for initializing the state for pure Altair testnets
 *Note*: The function `initialize_beacon_state_from_eth1` is modified: (1) using `ALTAIR_FORK_VERSION` as the current fork version, (2) utilizing the Altair `BeaconBlockBody` when constructing the initial `latest_block_header`, and (3) adding initial sync committees.
 
 ```python
-def initialize_beacon_state_from_eth1(eth1_block_hash: Bytes32,
+def initialize_beacon_state_from_eth1(eth1_block_hash: Hash32,
                                       eth1_timestamp: uint64,
                                       deposits: Sequence[Deposit]) -> BeaconState:
     fork = Fork(
diff --git a/specs/merge/beacon-chain.md b/specs/merge/beacon-chain.md
index ac5b6d0ec..661d333fa 100644
--- a/specs/merge/beacon-chain.md
+++ b/specs/merge/beacon-chain.md
@@ -406,7 +406,7 @@ Modifications include:
   Else, the Merge starts from genesis and the transition is incomplete.
 
 ```python
-def initialize_beacon_state_from_eth1(eth1_block_hash: Bytes32,
+def initialize_beacon_state_from_eth1(eth1_block_hash: Hash32,
                                       eth1_timestamp: uint64,
                                       deposits: Sequence[Deposit],
                                       execution_payload_header: ExecutionPayloadHeader=ExecutionPayloadHeader()
diff --git a/specs/phase0/beacon-chain.md b/specs/phase0/beacon-chain.md
index e2e235acf..1618aa37c 100644
--- a/specs/phase0/beacon-chain.md
+++ b/specs/phase0/beacon-chain.md
@@ -1175,7 +1175,7 @@ Before the Ethereum beacon chain genesis has been triggered, and for every Ether
 Proof-of-work blocks must only be considered once they are at least `SECONDS_PER_ETH1_BLOCK * ETH1_FOLLOW_DISTANCE` seconds old (i.e. `eth1_timestamp + SECONDS_PER_ETH1_BLOCK * ETH1_FOLLOW_DISTANCE <= current_unix_time`). Due to this constraint, if `GENESIS_DELAY < SECONDS_PER_ETH1_BLOCK * ETH1_FOLLOW_DISTANCE`, then the `genesis_time` can happen before the time/state is first known. Values should be configured to avoid this case.
 
 ```python
-def initialize_beacon_state_from_eth1(eth1_block_hash: Bytes32,
+def initialize_beacon_state_from_eth1(eth1_block_hash: Hash32,
                                       eth1_timestamp: uint64,
                                       deposits: Sequence[Deposit]) -> BeaconState:
     fork = Fork(