diff --git a/README.md b/README.md
index 770a43d..05746b8 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
 # openmamba-release
 
-Release file and Smart Package Manager configuration for openmamba 4.90.2 .
+Release file and Smart Package Manager configuration for openmamba 4.91.0 .
 
diff --git a/openmamba-release.spec b/openmamba-release.spec
index 547bab2..819d61f 100644
--- a/openmamba-release.spec
+++ b/openmamba-release.spec
@@ -17,7 +17,7 @@
 %endif
 
 Name:          openmamba-release
-Version:       4.90.2
+Version:       4.91.0
 Release:       1mamba
 Summary:       Release file and Smart Package Manager configuration for %{distroid} %{fullversion} %{?codename:(%codename)}
 Group:         System/Configuration
@@ -177,6 +177,9 @@ fi
 %config %{_sysconfdir}/yum/repos.d/openmamba-rolling-unstable.repo
 
 %changelog
+* Sat Jan 19 2019 Silvan Calarco <silvan.calarco@mambasoft.it> 4.91.0-1mamba
+- update to 4.91.0
+
 * Tue Dec 11 2018 Silvan Calarco <silvan.calarco@mambasoft.it> 4.90.2-1mamba
 - update to 4.90.2