diff --git a/snapshots/Keystore32NodeUCMT.json b/snapshots/Keystore32NodeUCMT.json
index 0f26ec4..f8f8738 100644
--- a/snapshots/Keystore32NodeUCMT.json
+++ b/snapshots/Keystore32NodeUCMT.json
@@ -1,5 +1,5 @@
 {
-  "1. registerNode": "77515",
+  "1. registerNode": "77284",
   "2. validate (with proof)": "12407",
   "3. validate (without proof)": "5284",
   "4. handleUpdates (with proof)": "64278",
diff --git a/src/core/Keystore.sol b/src/core/Keystore.sol
index 3cd9875..31a9c8c 100644
--- a/src/core/Keystore.sol
+++ b/src/core/Keystore.sol
@@ -53,7 +53,7 @@ contract Keystore is IKeystore {
 
         bytes32 rootHash = _getCurrentRootHash(refHash, msg.sender);
         bytes32 nodeHash = keccak256(node);
-        require(MerkleProofLib.verify(proof, rootHash, nodeHash), InvalidProof());
+        require(MerkleProofLib.verifyCalldata(proof, rootHash, nodeHash), InvalidProof());
 
         _nodeCache[rootHash][nodeHash][msg.sender] = node;
     }