diff --git a/package.json b/package.json
index 49ec2153..1bc7250b 100644
--- a/package.json
+++ b/package.json
@@ -29,6 +29,6 @@
     "typescript": "^1.8.7"
   },
   "dependencies": {
-    "pxt-core": "0.4.74"
+    "pxt-core": "0.5.1"
   }
 }