diff --git a/CHANGELOG b/CHANGELOG
index e69de29..39f41bd 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -0,0 +1 @@
+Version 4.0.0 - 2016-05-03
diff --git a/tryton.cfg b/tryton.cfg
index ef0c45e..6ddcca2 100644
--- a/tryton.cfg
+++ b/tryton.cfg
@@ -1,5 +1,5 @@
 [tryton]
-version=3.9.0
+version=4.0.0
 depends:
     ir
     res