diff --git a/playground/dan/gateways/is-rain-schema.json b/playground/dan/gateways/is-rain-schema.json
index afd1d931..375f305d 100644
--- a/playground/dan/gateways/is-rain-schema.json
+++ b/playground/dan/gateways/is-rain-schema.json
@@ -7,7 +7,7 @@
       "title": "Is it raining today?",
       "default": false
       "oneOf": {
-        "title" : "Yes"
+        "title" : "Yes",
       }
     }
   }