diff --git a/README.md b/README.md
index 2fc27f3..0732178 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
 # openmamba-release
 
-Release files for openmamba 2020.11 .
+Release files for openmamba 2020.12 .
 
diff --git a/openmamba-release.spec b/openmamba-release.spec
index 5168a18..5a2c076 100644
--- a/openmamba-release.spec
+++ b/openmamba-release.spec
@@ -17,8 +17,8 @@
 %endif
 
 Name:          openmamba-release
-Version:       2020.11
-Release:       2mamba
+Version:       2020.12
+Release:       1mamba
 Summary:       Release files for %{distroid} %{fullversion} %{?codename:(%codename)}
 Group:         System/Configuration
 Vendor:        openmamba
@@ -152,6 +152,9 @@ done
 %config %{_sysconfdir}/yum/repos.d/openmamba-rolling-unstable.repo
 
 %changelog
+* Sun Dec 20 2020 Silvan Calarco <silvan.calarco@mambasoft.it> 2020.12-1mamba
+- update to 2020.12
+
 * Sun Nov 22 2020 Silvan Calarco <silvan.calarco@mambasoft.it> 2020.11-2mamba
 - added a posttrans script to clean broken alternatives