diff --git a/CHANGELOG b/CHANGELOG
index 4e94e985f2..8de488cf81 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,5 @@
+Version 4.0.0 - 2016-05-02
+* Bug fixes (see mercurial logs for details)
 * Move purchase request to purchase_request module
 * Add Python3 support
 * Add searcher on purchase
diff --git a/COPYRIGHT b/COPYRIGHT
index 4f0ee3a359..4c58e299f1 100644
--- a/COPYRIGHT
+++ b/COPYRIGHT
@@ -1,7 +1,7 @@
 Copyright (C) 2013-2015 NaN-tic.
-Copyright (C) 2008-2015 Cédric Krier.
+Copyright (C) 2008-2016 Cédric Krier.
 Copyright (C) 2008-2013 Bertrand Chenal.
-Copyright (C) 2008-2015 B2CK SPRL.
+Copyright (C) 2008-2016 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/tryton.cfg b/tryton.cfg
index b16fa035bb..ed01a9070d 100644
--- a/tryton.cfg
+++ b/tryton.cfg
@@ -1,5 +1,5 @@
 [tryton]
-version=3.9.0
+version=4.0.0
 depends:
     account
     ir