diff --git a/libs/hello/pxt.json b/libs/hello/pxt.json
index 599a3efb..b18eb115 100644
--- a/libs/hello/pxt.json
+++ b/libs/hello/pxt.json
@@ -6,6 +6,6 @@
     ],
     "public": true,
     "dependencies": {
-        "core": "file:../core",
+        "core": "file:../core"
     }
 }