diff --git a/packages/evm/contracts/adapters/BlockHashAdapter.sol b/packages/evm/contracts/adapters/BlockHashAdapter.sol
index bdf65b50..173a5a8b 100644
--- a/packages/evm/contracts/adapters/BlockHashAdapter.sol
+++ b/packages/evm/contracts/adapters/BlockHashAdapter.sol
@@ -12,21 +12,14 @@ abstract contract BlockHashAdapter is IBlockHashAdapter, Adapter {
     function proveAncestralBlockHashes(uint256 chainId, bytes[] memory blockHeaders) external {
         for (uint256 i = 0; i < blockHeaders.length; i++) {
             RLPReader.RLPItem memory blockHeaderRLP = RLPReader.toRlpItem(blockHeaders[i]);
-
             if (!blockHeaderRLP.isList()) revert InvalidBlockHeaderRLP();
-
             RLPReader.RLPItem[] memory blockHeaderContent = blockHeaderRLP.toList();
 
-            // A block header should have between 15 and 17 elements (baseFee and withdrawalsRoot have been added later)
-            if (blockHeaderContent.length < 15 || blockHeaderContent.length > 17)
-                revert InvalidBlockHeaderLength(blockHeaderContent.length);
-
             bytes32 blockParent = bytes32(blockHeaderContent[0].toUint());
             uint256 blockNumber = uint256(blockHeaderContent[8].toUint());
 
             bytes32 blockHash = keccak256(blockHeaders[i]);
             bytes32 storedBlockHash = getHash(chainId, blockNumber);
-
             if (blockHash != storedBlockHash) revert ConflictingBlockHeader(blockNumber, blockHash, storedBlockHash);
 
             _storeHash(chainId, blockNumber - 1, blockParent);
diff --git a/packages/evm/contracts/interfaces/IAdapter.sol b/packages/evm/contracts/interfaces/IAdapter.sol
index 72498484..72b9c7f2 100644
--- a/packages/evm/contracts/interfaces/IAdapter.sol
+++ b/packages/evm/contracts/interfaces/IAdapter.sol
@@ -6,7 +6,6 @@ pragma solidity ^0.8.0;
  */
 interface IAdapter {
     error ConflictingBlockHeader(uint256 blockNumber, bytes32 blockHash, bytes32 storedBlockHash);
-    error InvalidBlockHeaderLength(uint256 length);
     error InvalidBlockHeaderRLP();
 
     /**
diff --git a/packages/evm/test/adapters/02_Adapter.spec.ts b/packages/evm/test/adapters/02_Adapter.spec.ts
index ed60d30c..8b9f9987 100644
--- a/packages/evm/test/adapters/02_Adapter.spec.ts
+++ b/packages/evm/test/adapters/02_Adapter.spec.ts
@@ -113,25 +113,5 @@ describe("Adapter", function () {
         "InvalidBlockHeaderRLP",
       )
     })
-
-    it("Reverts if block proof doesn't match valid block header lengths", async function () {
-      const { adapter, blocks } = await setup()
-      const blockHeaderContents = RLP.decode(blockRLP(blocks[0]))
-      const blockHeaderTooShortContents = blockHeaderContents.slice(0, 14)
-      const blockHeaderTooShort = RLP.encode(blockHeaderTooShortContents)
-
-      // Block header RLP contains too few elements
-      await expect(adapter.proveAncestralBlockHashes(CHAIN_ID, [blockHeaderTooShort]))
-        .to.revertedWithCustomError(adapter, "InvalidBlockHeaderLength")
-        .withArgs(blockHeaderTooShortContents.length)
-
-      const blockHeaderTooLongContents = blockHeaderContents.concat([adapter.address, adapter.address])
-      const blockHeaderTooLong = RLP.encode(blockHeaderTooLongContents)
-
-      // Block header RLP contains too many elements
-      await expect(adapter.proveAncestralBlockHashes(CHAIN_ID, [blockHeaderTooLong]))
-        .to.revertedWithCustomError(adapter, "InvalidBlockHeaderLength")
-        .withArgs(blockHeaderTooLongContents.length)
-    })
   })
 })