diff --git a/README.md b/README.md
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+++ b/README.md
@@ -1,2 +1,4 @@
 # ruby-json_pure
 
+A JSON implementation in pure Ruby.
+
diff --git a/json_pure-1.8.1.gem b/json_pure-1.8.1.gem
new file mode 100644
index 0000000..f23ca9a
Binary files /dev/null and b/json_pure-1.8.1.gem differ
diff --git a/ruby-json_pure.spec b/ruby-json_pure.spec
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+++ b/ruby-json_pure.spec
@@ -0,0 +1,46 @@
+%define gemdir %(ruby -rubygems -e'puts Gem.default_dir')
+%define gemname %(echo %{name} | sed 's,^ruby-,,')
+Name:          ruby-json_pure
+Version:       1.8.1
+Release:       1mamba
+Summary:       A JSON implementation in pure Ruby
+Group:         System/Libraries
+Vendor:        openmamba
+Distribution:  openmamba
+Packager:      Silvan Calarco <silvan.calarco@mambasoft.it>
+URL:           http://flori.github.io/json/
+Source:        http://rubygems.org/downloads/json_pure-%{version}.gem
+License:       GPL
+## AUTOBUILDREQ-BEGIN
+## AUTOBUILDREQ-END
+BuildRequires: ruby-devel
+Requires:      ruby
+
+%description
+A JSON implementation in pure Ruby.
+
+%prep
+
+%build
+
+%install
+[ "%{buildroot}" != / ] && rm -rf "%{buildroot}"
+gem install --no-user-install --ignore-dependencies -u -i "%{buildroot}%{gemdir}" \
+   --no-ri --no-rdoc -n "%{buildroot}/usr/bin" "%{SOURCE0}"
+
+rm -rf %{buildroot}%{gemdir}/cache
+rm -f %{buildroot}%{gemdir}/gems/%{gemname}-%{version}/.gitignore
+
+%clean
+[ "%{buildroot}" != / ] && rm -rf "%{buildroot}"
+
+%files
+%defattr(-,root,root)
+%dir %{gemdir}/gems/%{gemname}-%{version}
+%{gemdir}/gems/%{gemname}-%{version}/*
+%{gemdir}/gems/%{gemname}-%{version}/.travis.yml
+%{gemdir}/specifications/%{gemname}-%{version}.gemspec
+
+%changelog
+* Wed Dec 11 2013 Silvan Calarco <silvan.calarco@mambasoft.it> 1.8.1-1mamba
+- package created using the webbuild interface