diff --git a/package.json b/package.json
index af561246..2820425f 100644
--- a/package.json
+++ b/package.json
@@ -45,7 +45,7 @@
   },
   "dependencies": {
     "pxt-common-packages": "0.21.13",
-    "pxt-core": "3.12.5"
+    "pxt-core": "3.12.9"
   },
   "scripts": {
     "test": "node node_modules/pxt-core/built/pxt.js travis"