diff --git a/README.md b/README.md
index 8b5f130..83ca235 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,4 @@
 # libjson-c4
 
+JSON-C implements a reference counting object model that allows you to easily construct JSON objects in C, output them as JSON formatted strings and parse JSON formatted strings back into the C representation of JSON objects.
+
diff --git a/libjson-c4.spec b/libjson-c4.spec
new file mode 100644
index 0000000..63940f2
--- /dev/null
+++ b/libjson-c4.spec
@@ -0,0 +1,90 @@
+%define gitver %(echo %version | tr _ -)
+Name:          libjson-c4
+Version:       0.13.1_20180305
+Release:       2mamba
+Summary:       A reference counting object model that allows you to easily construct JSON objects in C
+Group:         System/Libraries
+Vendor:        openmamba
+Distribution:  openmamba
+Packager:      Silvan Calarco <silvan.calarco@mambasoft.it>
+URL:           http://oss.metaparadigm.com/json-c/
+Source:        https://github.com/json-c/json-c.git/json-c-%{gitver}/json-c-%{version}.tar.bz2
+#Source:        http://oss.metaparadigm.com/json-c/json-c-%{version}.tar.gz
+License:       MIT
+## AUTOBUILDREQ-BEGIN
+BuildRequires: glibc-devel
+BuildRequires: pkg-config
+## AUTOBUILDREQ-END
+BuildRoot:     %{_tmppath}/%{name}-%{version}-root
+
+%description
+JSON-C implements a reference counting object model that allows you to easily construct JSON objects in C, output them as JSON formatted strings and parse JSON formatted strings back into the C representation of JSON objects.
+
+%package devel
+Group:         Development/Libraries
+Summary:       Development files for %{name}
+Requires:      %{name} = %{?epoch:%epoch:}%{version}-%{release}
+Requires:      pkg-config
+
+%description devel
+This package contains libraries and header files for developing applications that use %{name}.
+
+%debug_package
+
+%prep
+%setup -q -n json-c-%{version}
+
+%build
+%configure
+%make -j1
+
+%install
+[ "%{buildroot}" != / ] && rm -rf "%{buildroot}"
+%makeinstall
+
+%clean
+[ "%{buildroot}" != / ] && rm -rf "%{buildroot}"
+
+%post -p /sbin/ldconfig
+%postun -p /sbin/ldconfig
+
+%pre devel
+[ -d %{_includedir}/json ] && rm -rf %{_includedir}/json
+:
+
+%files
+%defattr(-,root,root)
+%{_libdir}/libjson-c.so.*
+%doc AUTHORS COPYING
+
+%files devel
+%defattr(-,root,root)
+%dir %{_includedir}/json-c
+%{_includedir}/json-c/*.h
+%{_libdir}/libjson-c.a
+%{_libdir}/libjson-c.la
+%{_libdir}/libjson-c.so
+%{_libdir}/pkgconfig/json-c.pc
+%doc ChangeLog NEWS README README.html
+
+%changelog
+* Tue May 05 2020 Silvan Calarco <silvan.calarco@mambasoft.it> 0.13.1_20180305-2mamba
+- legacy package
+
+* Sun Jul 29 2018 Silvan Calarco <silvan.calarco@mambasoft.it> 0.13.1_20180305-1mamba
+- update to 0.13.1_20180305
+
+* Sat Jan 06 2018 Automatic Build System <autodist@mambasoft.it> 0.13-1mamba
+- automatic version update by autodist
+
+* Sun Jul 31 2016 Silvan Calarco <silvan.calarco@mambasoft.it> 0.12.1_20160607-1mamba
+- update to 0.12.1_20160607
+
+* Mon Jun 16 2014 Automatic Build System <autodist@mambasoft.it> 0.12-1mamba
+- automatic version update by autodist
+
+* Sat Jan 25 2014 Silvan Calarco <silvan.calarco@mambasoft.it> 0.11-1mamba
+- update to 0.11
+
+* Sat May 12 2012 Silvan Calarco <silvan.calarco@mambasoft.it> 0.9-1mamba
+- package created by autospec