diff --git a/CHANGELOG b/CHANGELOG
index 8b13789..24ac3ea 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1 +1,2 @@
+Version 4.0.0 - 2016-05-03
 
diff --git a/tryton.cfg b/tryton.cfg
index 5f876cd..e20a883 100644
--- a/tryton.cfg
+++ b/tryton.cfg
@@ -1,5 +1,5 @@
 [tryton]
-version=3.9.0
+version=4.0.0
 depends:
     ir
     res