diff --git a/gn.spec b/gn.spec
index 8029a31..9b84ad0 100644
--- a/gn.spec
+++ b/gn.spec
@@ -1,5 +1,7 @@
+%define commit_ver %(echo %version | cut -d. -f3)
 Name:          gn
-Version:       0.20201109git
+Epoch:         1
+Version:       0.1819.e327ffdc
 Release:       1mamba
 Summary:       A meta-build system that generates build files for Ninja
 Group:         Development/Tools
@@ -7,7 +9,7 @@ Vendor:        openmamba
 Distribution:  openmamba
 Packager:      Silvan Calarco <silvan.calarco@mambasoft.it>
 URL:           https://gn.googlesource.com/gn/+/master/README.md
-Source:        https://gn.googlesource.com/gn.git/master/gn-%{version}.tar.bz2
+Source:        https://gn.googlesource.com/gn.git/master@%{commit_ver}/gn-%{version}.tar.bz2
 Patch0:        gn-0.20200521git-gcc-support.patch
 License:       BSD
 ## AUTOBUILDREQ-BEGIN
@@ -66,6 +68,9 @@ install -D -m0755 out/gn %{buildroot}%{_bindir}/gn
 %doc AUTHORS LICENSE
 
 %changelog
+* Wed Nov 11 2020 Silvan Calarco <silvan.calarco@mambasoft.it> 0.1819.e327ffdc-1mamba
+- update to 0.1819.e327ffdc
+
 * Mon Nov 09 2020 Silvan Calarco <silvan.calarco@mambasoft.it> 0.20201109git-1mamba
 - update to 0.20201109git