diff --git a/package.json b/package.json
index 21cc55a1..4902cd62 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "pxt-calliope",
-  "version": "0.4.20",
+  "version": "0.4.21",
   "description": "calliope target for PXT",
   "keywords": [
     "JavaScript",