diff --git a/packages/siwe-parser/lib/utils.ts b/packages/siwe-parser/lib/utils.ts
index 3c043e7b..8385ee2a 100644
--- a/packages/siwe-parser/lib/utils.ts
+++ b/packages/siwe-parser/lib/utils.ts
@@ -6,6 +6,10 @@ import { bytesToHex } from '@noble/hashes/utils';
  * @returns Either the return is or not in the EIP-55 format.
  */
 export const isEIP55Address = (address: string) => {
+    if(address.length != 42) {
+        return false;
+    }
+
     const lowerAddress = `${address}`.toLowerCase().replace('0x', '');
     var hash = bytesToHex(keccak_256(lowerAddress));
     var ret = '0x';