diff --git a/CHANGELOG b/CHANGELOG
index 1cf19c5ae5..54685e341d 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,5 @@
+Version 4.0.0 - 2016-05-02
+* Bug fixes (see mercurial logs for details)
 * Add Python3 support
 
 Version 3.8.0 - 2015-11-02
diff --git a/COPYRIGHT b/COPYRIGHT
index 501e672bd9..b8eb554480 100644
--- a/COPYRIGHT
+++ b/COPYRIGHT
@@ -1,7 +1,7 @@
-Copyright (C) 2011-2015 Cédric Krier.
+Copyright (C) 2011-2016 Cédric Krier.
 Copyright (C) 2011-2013 Bertrand Chenal.
 Copyright (C) 2011-2015 Nicolas Évrard.
-Copyright (C) 2011-2015 B2CK SPRL.
+Copyright (C) 2011-2016 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 3be184d3b1..2e566fe653 100644
--- a/tryton.cfg
+++ b/tryton.cfg
@@ -1,5 +1,5 @@
 [tryton]
-version=3.9.0
+version=4.0.0
 depends:
     ir
     party