diff --git a/package.json b/package.json
index fa92ac3..7a99ecf 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@orionprotocol/sdk",
-  "version": "0.16.0-rc.23",
+  "version": "0.16.0-rc.24",
   "description": "Orion Protocol SDK",
   "main": "./lib/esm/index.js",
   "module": "./lib/esm/index.js",
diff --git a/src/utils/typeHelpers.ts b/src/utils/typeHelpers.ts
index eb901b7..a65cbb8 100644
--- a/src/utils/typeHelpers.ts
+++ b/src/utils/typeHelpers.ts
@@ -3,7 +3,7 @@ type WithReason = {
 }
 
 type WithCodeError = Error & {
-  code: number;
+  code: number | string;
 }
 
 type WithMessage = {
@@ -41,9 +41,9 @@ export function hasProp<T extends Record<string, unknown>, K extends PropertyKey
 }
 
 export function isWithCode(candidate: unknown): candidate is WithCodeError {
-  if (!isUnknownObject(candidate)) return false;
-  const hasCodeProperty = hasProp(candidate, 'code') && typeof candidate.code === 'number';
-  return hasCodeProperty;
+  if (!isUnknownObject(candidate) || !hasProp(candidate, 'code')) return false;
+  const type = typeof candidate.code;
+  return type === 'number' || type === 'string';
 }
 
 export function isWithReason(candidate: unknown): candidate is WithReason {