diff --git a/CHANGELOG b/CHANGELOG
index e8371cc917..85478cfb4d 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,5 @@
+Version 4.0.0 - 2016-05-02
+* Bug fixes (see mercurial logs for details)
 * Replace category by categories on Template
 * Add Python3 support
 * Add configuration for default cost price method
diff --git a/COPYRIGHT b/COPYRIGHT
index 3a28212f92..48f96af066 100644
--- a/COPYRIGHT
+++ b/COPYRIGHT
@@ -1,6 +1,6 @@
-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.
 Copyright (C) 2004-2008 Tiny SPRL.
 
 This program is free software: you can redistribute it and/or modify
diff --git a/tryton.cfg b/tryton.cfg
index da66325206..a37bfc246b 100644
--- a/tryton.cfg
+++ b/tryton.cfg
@@ -1,5 +1,5 @@
 [tryton]
-version=3.9.0
+version=4.0.0
 depends:
     ir
     res