diff --git a/ktnef.spec b/ktnef.spec
index f48f5b2..2705c18 100644
--- a/ktnef.spec
+++ b/ktnef.spec
@@ -1,7 +1,7 @@
 %define majver %(echo %version | cut -d. -f1-2)
 
 Name:          ktnef
-Version:       17.08.3
+Version:       17.12.0
 Release:       1mamba
 Summary:       KDE Frameworks 5 tnef library
 Group:         System/Libraries
@@ -116,6 +116,9 @@ exit 0
 %{_kde5_mkspecsdir}/qt_KTNef.pri
 
 %changelog
+* Fri Jan 05 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