diff --git a/tzdata.spec b/tzdata.spec
index 864c330..653b062 100644
--- a/tzdata.spec
+++ b/tzdata.spec
@@ -9,7 +9,7 @@
 %endif
 
 Name:          tzdata
-Version:       2017b
+Version:       2017c
 Release:       1mamba
 Summary:       timezone data
 Group:         System/Internationalization
@@ -118,6 +118,9 @@ cp -pr zoneinfo/java %{buildroot}%{_datadir}/javazi
 %endif
 
 %changelog
+* Wed Nov 01 2017 Automatic Build System <autodist@mambasoft.it> 2017c-1mamba
+- automatic version update by autodist
+
 * Fri Mar 31 2017 Automatic Build System <autodist@mambasoft.it> 2017b-1mamba
 - automatic version update by autodist