diff --git a/package.json b/package.json
index 75c2ea3..0d371fe 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "microbundle",
-  "version": "0.3.1",
+  "version": "0.4.0",
   "description": "Zero-configuration bundler for tiny JS libs, powered by Rollup.",
   "main": "dist/microbundle.js",
   "source": "src/index.js",