diff --git a/package-lock.json b/package-lock.json
index 5cb7e22..06c8872 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "ukiyojs",
-  "version": "4.0.5",
+  "version": "4.0.6",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "ukiyojs",
-      "version": "4.0.5",
+      "version": "4.0.6",
       "license": "MIT",
       "devDependencies": {
         "@rollup/plugin-buble": "^0.21.3",
diff --git a/package.json b/package.json
index f0cdde8..61a700a 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "ukiyojs",
-  "version": "4.0.5",
+  "version": "4.0.6",
   "description": "Modern parallax library for picture elements and any images",
   "homepage": "https://yitengjun.github.io/ukiyo-js/",
   "repository": {