diff --git a/playground/nutech/receipt/timertfc-schema.json b/playground/nutech/receipt/timertfc-schema.json
index 53baff78..799d8615 100644
--- a/playground/nutech/receipt/timertfc-schema.json
+++ b/playground/nutech/receipt/timertfc-schema.json
@@ -13,7 +13,7 @@
     "time_format":{
       "type": "string",
       "title": "Time format",
-      "enum": ["Hour(s)", "Minute(s)", "Second(s)","Days"]
+      "enum": ["Hour(s)", "Minute(s)", "Second(s)","Day"]
     }
   }
 }
\ No newline at end of file