diff --git a/packages/statemanager/src/rpcStateManager.ts b/packages/statemanager/src/rpcStateManager.ts
index 2c6016aac42..c222be1691c 100644
--- a/packages/statemanager/src/rpcStateManager.ts
+++ b/packages/statemanager/src/rpcStateManager.ts
@@ -344,11 +344,7 @@ export class RPCStateManager implements StateManagerInterface {
     if (this.DEBUG) this._debug(`retrieving proof from provider for ${address.toString()}`)
     const proof = await fetchFromProvider(this._provider, {
       method: 'eth_getProof',
-      params: [
-        address.toString(),
-        [storageSlots.map((slot) => bytesToHex(slot))],
-        this._blockTag,
-      ] as any,
+      params: [address.toString(), storageSlots.map(bytesToHex), this._blockTag],
     })
 
     return proof