diff --git a/microsoft-gsl.spec b/microsoft-gsl.spec
index 7a8486c..7b339f7 100644
--- a/microsoft-gsl.spec
+++ b/microsoft-gsl.spec
@@ -1,19 +1,18 @@
 Name:          microsoft-gsl
-Version:       3.1.0
+Version:       4.0.0
 Release:       1mamba
 Summary:       Functions and types that are suggested for use by the C++ Core Guidelines maintained by the Standard C++ Foundation
 Group:         Development/Libraries
 Vendor:        openmamba
 Distribution:  openmamba
 Packager:      Silvan Calarco <silvan.calarco@mambasoft.it>
-URL:           https://github.com/microsoft/GSL.git
+URL:           https://github.com/microsoft/GSL
 Source:        https://github.com/microsoft/GSL.git/v%{version}/GSL-%{version}.tar.bz2
 License:       MIT
 ## AUTOBUILDREQ-BEGIN
 ## AUTOBUILDREQ-END
 BuildRequires: cmake
 Requires:      lib%{name} = %{?epoch:%epoch:}%{version}-%{release}
-BuildRoot:     %{_tmppath}/%{name}-%{version}-root
 
 %description
 The Guidelines Support Library (GSL) contains functions and types that are suggested for use by the C++ Core Guidelines maintained by the Standard C++ Foundation. This repo contains Microsoft's implementation of GSL.
@@ -61,5 +60,8 @@ This package contains libraries and header files for developing applications tha
 %doc LICENSE
 
 %changelog
+* Thu Jan 27 2022 Automatic Build System <autodist@mambasoft.it> 4.0.0-1mamba
+- automatic version update by autodist
+
 * Thu Dec 24 2020 Silvan Calarco <silvan.calarco@mambasoft.it> 3.1.0-1mamba
 - package created using the webbuild interface