diff --git a/zeppelin-web-angular/src/app/pages/workspace/interpreter/item/item.component.ts b/zeppelin-web-angular/src/app/pages/workspace/interpreter/item/item.component.ts
index 4bd5c533bfe..30af7e7daa7 100644
--- a/zeppelin-web-angular/src/app/pages/workspace/interpreter/item/item.component.ts
+++ b/zeppelin-web-angular/src/app/pages/workspace/interpreter/item/item.component.ts
@@ -95,7 +95,7 @@ export class InterpreterItemComponent extends DestroyHookComponent implements On
       .forEach((e: any) => {
         const { key, value, type } = e;
         properties[key] = {
-          value,
+          value: value.toString(),
           type,
           name: key
         };