diff --git a/packages/core/src/modules/credentials/CredentialUtils.ts b/packages/core/src/modules/credentials/CredentialUtils.ts
index 52bdb6ccc2..43b4b5653b 100644
--- a/packages/core/src/modules/credentials/CredentialUtils.ts
+++ b/packages/core/src/modules/credentials/CredentialUtils.ts
@@ -153,7 +153,7 @@ export class CredentialUtils {
 
     // If value is an int32 number string return as number string
     if (isString(value) && !isEmpty(value) && !isNaN(Number(value)) && this.isInt32(Number(value))) {
-      return value
+      return Number(value).toString()
     }
 
     if (isNumber(value)) {
diff --git a/packages/core/src/modules/credentials/__tests__/CredentialUtils.test.ts b/packages/core/src/modules/credentials/__tests__/CredentialUtils.test.ts
index 9684e1832a..6a391014f5 100644
--- a/packages/core/src/modules/credentials/__tests__/CredentialUtils.test.ts
+++ b/packages/core/src/modules/credentials/__tests__/CredentialUtils.test.ts
@@ -74,6 +74,10 @@ const testEncodings: { [key: string]: { raw: string | number | boolean | null; e
     raw: '0.1',
     encoded: '9382477430624249591204401974786823110077201914483282671737639310288175260432',
   },
+  'leading zero number string': {
+    raw: '012345',
+    encoded: '12345',
+  },
   'chr 0': {
     raw: String.fromCharCode(0),
     encoded: '49846369543417741186729467304575255505141344055555831574636310663216789168157',