diff --git a/CHANGELOG b/CHANGELOG
index fbb0713292..fbfcc54820 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,5 @@
+Version 4.0.0 - 2016-05-02
+* Bug fixes (see mercurial logs for details)
 * Rename Asset reference into number
 * Add Python3 support
 
diff --git a/COPYRIGHT b/COPYRIGHT
index 63ab9fa38c..62744da62f 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) 2012-2013 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/tryton.cfg b/tryton.cfg
index 3ce428d025..96ea777323 100644
--- a/tryton.cfg
+++ b/tryton.cfg
@@ -1,5 +1,5 @@
 [tryton]
-version=3.9.0
+version=4.0.0
 depends:
     ir
     res