diff --git a/CHANGELOG b/CHANGELOG
index 200ecf4..3b98e82 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,4 @@
+Version 4.0.0 - 2016-05-03
 Version 3.4.0 - 2014-11-05
 
 Version 2.7.0 - 2013-03-20
diff --git a/tryton.cfg b/tryton.cfg
index 355c70e..14c4397 100644
--- a/tryton.cfg
+++ b/tryton.cfg
@@ -1,5 +1,5 @@
 [tryton]
-version=3.9.0
+version=4.0.0
 depends:
     ir
     res