diff --git a/CHANGELOG.md b/CHANGELOG.md
index f00a846..452ac98 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,4 +1,11 @@
 # CHANGELOG
+## v4.0.0
+
+ * feature: set default wallet
+ * add option for generate a random password when you update an item
+ * fix encryption when you share an existing wallet
+ * several bugs fix
+
 ## v4.0.0-beta1
 
  * add manage share key with new interface
diff --git a/README.md b/README.md
index 6b32418..7ac7d47 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,5 @@
 # MPW: Manage your passwords!
-[![Version](https://img.shields.io/badge/latest_version-4.0.0--beta1-yellow.svg)](https://github.com/nishiki/manage-password/releases)
+[![Version](https://img.shields.io/badge/latest_version-4.0.0-green.svg)](https://github.com/nishiki/manage-password/releases)
 [![Build Status](https://travis-ci.org/nishiki/manage-password.svg?branch=master)](https://travis-ci.org/nishiki/manage-password)
 [![License](https://img.shields.io/badge/license-GPL--2.0-blue.svg)](https://github.com/nishiki/manage-password/blob/master/LICENSE)
 
diff --git a/VERSION b/VERSION
index 817c97b..fcdb2e1 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-4.0.0-beta1
+4.0.0