diff --git a/package.json b/package.json
index b7fef54c..1d4ae7ac 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "pixi-live2d-display",
-  "version": "0.3.1",
+  "version": "0.4.0-beta",
   "description": "Live2D plugin for PixiJS",
   "main": "lib/index.js",
   "repository": {