diff --git a/CHANGELOG b/CHANGELOG
index b777098ed8..ef8d10757f 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,5 @@
+Version 4.0.0 - 2016-05-02
+* Bug fixes (see mercurial logs for details)
 * Timedelta uses 30 days for month
 * Manage context model of ir.action.act_window
 * Add Note
diff --git a/COPYRIGHT b/COPYRIGHT
index e5e1ef9a42..14d67a3bfc 100644
--- a/COPYRIGHT
+++ b/COPYRIGHT
@@ -1,7 +1,7 @@
 Copyright (C) 2012-2015 Nicolas Évrard.
-Copyright (C) 2012-2015 Cédric Krier.
+Copyright (C) 2012-2016 Cédric Krier.
 Copyright (C) 2012-2014 Bertrand Chenal.
-Copyright (C) 2012-2015 B2CK SPRL.
+Copyright (C) 2012-2016 B2CK SPRL.
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
diff --git a/package.json b/package.json
index 756a0cec4b..3a880decb9 100644
--- a/package.json
+++ b/package.json
@@ -2,7 +2,7 @@
   "name": "tryton-sao",
   "title": "sao",
   "description": "Tryton webclient",
-  "version": "3.9.0",
+  "version": "4.0.0",
   "homepage": "http://www.tryton.org/",
   "author": {
     "name": "Tryton"