diff --git a/facter-1.7.3.gem b/facter-1.7.3.gem
deleted file mode 100644
index 05d007e..0000000
Binary files a/facter-1.7.3.gem and /dev/null differ
diff --git a/facter-2.5.1.gem b/facter-2.5.1.gem
new file mode 100644
index 0000000..d1db3ef
Binary files /dev/null and b/facter-2.5.1.gem differ
diff --git a/ruby-facter.spec b/ruby-facter.spec
index 086b558..a738f70 100644
--- a/ruby-facter.spec
+++ b/ruby-facter.spec
@@ -1,8 +1,8 @@
 Name:          ruby-facter
-Version:       1.7.3
+Version:       2.5.1
 Release:       1mamba
 Summary:       A library for collecting facts about your system
-Group:         System/Managament
+Group:         System/Libraries
 Vendor:        openmamba
 Distribution:  openmamba
 Packager:      Silvan Calarco <silvan.calarco@mambasoft.it>
@@ -11,7 +11,8 @@ Source:        https://rubygems.org/downloads/facter-%{version}.gem
 License:       Apache License 2.0
 ## AUTOBUILDREQ-BEGIN
 ## AUTOBUILDREQ-END
-BuildRequires: ruby-devel
+BuildRequires: ruby-devel >= 2.5.1
+Requires:      ruby >= 2.5.1
 BuildRoot:     %{_tmppath}/%{name}-%{version}-root
 
 %description
@@ -24,7 +25,7 @@ A library for collecting facts about your system.
 
 %install
 [ "%{buildroot}" != / ] && rm -rf "%{buildroot}"
-gemdir="$(ruby -rubygems -e'puts Gem.default_dir')"
+gemdir="$(ruby -rrubygems -e'puts Gem.default_dir')"
 
 gem install --no-user-install --ignore-dependencies -i "%{buildroot}$gemdir" \
   --no-ri --no-rdoc -n "%{buildroot}/usr/bin" "%{SOURCE0}"
@@ -41,5 +42,8 @@ gem install --no-user-install --ignore-dependencies -i "%{buildroot}$gemdir" \
 %{_libdir}/ruby/gems/*/specifications/facter-%{version}.gemspec
 
 %changelog
+* Tue Jul 17 2018 Silvan Calarco <silvan.calarco@mambasoft.it> 2.5.1-1mamba
+- update to 2.5.1
+
 * Wed Dec 11 2013 Silvan Calarco <silvan.calarco@mambasoft.it> 1.7.3-1mamba
 - package created using the webbuild interface