diff --git a/kmbox.spec b/kmbox.spec
index f186bb7..5bd11a2 100644
--- a/kmbox.spec
+++ b/kmbox.spec
@@ -1,7 +1,7 @@
 %define majver %(echo %version | cut -d. -f1-2)
 
 Name:          kmbox
-Version:       21.08.3
+Version:       21.12.0
 Release:       1mamba
 Summary:       KDE Frameworks 5 mailbox library
 Group:         System/Libraries
@@ -87,6 +87,9 @@ exit 0
 %{_kde5_mkspecsdir}/qt_KMbox.pri
 
 %changelog
+* Sat Dec 11 2021 Automatic Build System <autodist@mambasoft.it> 21.12.0-1mamba
+- automatic version update by autodist
+
 * Sat Nov 06 2021 Automatic Build System <autodist@mambasoft.it> 21.08.3-1mamba
 - automatic version update by autodist