diff --git a/src/utils/validations.ts b/src/utils/validations.ts
index 2821f8a26..3f025bf60 100644
--- a/src/utils/validations.ts
+++ b/src/utils/validations.ts
@@ -141,7 +141,7 @@ export const validations: {
     );
   },
   isJson: function (values, value, minimum) {
-    if (isExisty(value) && !isEmpty(value)) {
+    if (isExisty(value) && !isEmpty(value) && typeof value === 'string') {
       try {
         JSON.parse(value);
       } catch (e) {