diff --git a/mailcommon.spec b/mailcommon.spec
index 249004b..331c564 100644
--- a/mailcommon.spec
+++ b/mailcommon.spec
@@ -1,7 +1,7 @@
 %define majver %(echo %version | cut -d. -f1-2)
 
 Name:          mailcommon
-Version:       17.08.3
+Version:       17.12.0
 Release:       1mamba
 Summary:       KDE Frameworks 5 common mail library
 Group:         System/Libraries
@@ -126,6 +126,9 @@ exit 0
 %{_libdir}/qt5/plugins/designer/mailcommonwidgets.so
 
 %changelog
+* Mon Jan 08 2018 Automatic Build System <autodist@mambasoft.it> 17.12.0-1mamba
+- automatic version update by autodist
+
 * Sat Nov 11 2017 Automatic Build System <autodist@mambasoft.it> 17.08.3-1mamba
 - automatic version update by autodist