diff --git a/playground/nutech/receipt/timertfc-schema.json b/playground/nutech/receipt/timertfc-schema.json
index d7deba66..40c57b74 100644
--- a/playground/nutech/receipt/timertfc-schema.json
+++ b/playground/nutech/receipt/timertfc-schema.json
@@ -10,7 +10,7 @@
       "title": "Timer Value"
     },
     "time_format":{
-      type: 'string',
+      "type: 'string',
       title: 'Dropdown Menu',
       enum: ['Option 1', 'Option 2', 'Option 3'],
     }