diff --git a/mutter.spec b/mutter.spec
index a9d1c06..53e6505 100644
--- a/mutter.spec
+++ b/mutter.spec
@@ -1,7 +1,7 @@
 %define majver %(echo %version | cut -d. -f1)
 %define apiver 8
 Name:          mutter
-Version:       40.3
+Version:       40.4
 Release:       1mamba
 Summary:       A compositing window manager based on Metacity
 Group:         Graphical Desktop/Libraries/GNOME
@@ -172,6 +172,9 @@ fi
 #%{_datadir}/gtk-doc/html/meta/*
 
 %changelog
+* Fri Aug 20 2021 Automatic Build System <autodist@mambasoft.it> 40.4-1mamba
+- automatic version update by autodist
+
 * Tue Jul 13 2021 Automatic Build System <autodist@mambasoft.it> 40.3-1mamba
 - automatic version update by autodist