diff --git a/libunibreak.spec b/libunibreak.spec
index 9d13ce0..4a15cea 100644
--- a/libunibreak.spec
+++ b/libunibreak.spec
@@ -1,13 +1,14 @@
+%define gitver %(echo %version | tr . _)
 Name:          libunibreak
-Version:       5.0
-Release:       2mamba
+Version:       5.1
+Release:       1mamba
 Summary:       An implementation of the line breaking and word breaking algorithms
 Group:         System/Libraries
 Vendor:        openmamba
 Distribution:  openmamba
 Packager:      Silvan Calarco <silvan.calarco@mambasoft.it>
 URL:           https://github.com/adah1972/libunibreak
-Source:        https://github.com/adah1972/libunibreak.git/libunibreak_%{version}/libunibreak-%{version}.tar.bz2
+Source:        https://github.com/adah1972/libunibreak.git/libunibreak_%{gitver}/libunibreak-%{version}.tar.bz2
 License:       zlib/libpng
 ## AUTOBUILDREQ-BEGIN
 BuildRequires: glibc-devel
@@ -66,6 +67,9 @@ This package contains libraries and header files for developing applications tha
 %doc NEWS README.md
 
 %changelog
+* Thu Dec 29 2022 Silvan Calarco <silvan.calarco@mambasoft.it> 5.1-1mamba
+- update to 5.1
+
 * Sun Dec 04 2022 Silvan Calarco <silvan.calarco@mambasoft.it> 5.0-2mamba
 - remove .la file