diff --git a/package.json b/package.json
index ae6ff1e..08aa023 100644
--- a/package.json
+++ b/package.json
@@ -33,7 +33,7 @@
   "devDependencies": {
     "eslint": "^4.13.1",
     "eslint-config-developit": "^1.1.1",
-    "microbundle": "^0.4.1"
+    "microbundle": "^0.5.0"
   },
   "dependencies": {
     "magic-string": "^0.22.4"