diff --git a/META b/META
index c6f0e96b..7771aa65 100755
--- a/META
+++ b/META
@@ -1,3 +1,3 @@
 Package: ior
-Version: 4.0.0rc2+dev
+Version: 4.0.0
 Release: 0
diff --git a/NEWS b/NEWS
index b036f2c3..cd38b9b0 100644
--- a/NEWS
+++ b/NEWS
@@ -1,4 +1,4 @@
-Version 4.0.0rc1+dev
+Version 4.0.0
 --------------------------------------------------------------------------------
 
 New major features: