diff --git a/README.md b/README.md
index ebf570d..c9fd756 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,4 @@
 # python-ujson
 
+Ultra fast JSON encoder and decoder for Python.
+
diff --git a/python-ujson.spec b/python-ujson.spec
new file mode 100644
index 0000000..e76130a
--- /dev/null
+++ b/python-ujson.spec
@@ -0,0 +1,52 @@
+Name:          python-ujson
+Version:       4.0.2
+Release:       1mamba
+Summary:       Ultra fast JSON encoder and decoder for Python
+Group:         System/Libraries
+Vendor:        openmamba
+Distribution:  openmamba
+Packager:      Silvan Calarco <silvan.calarco@mambasoft.it>
+URL:           https://github.com/ultrajson/ultrajson
+Source:        https://pypi.debian.net/ujson/ujson-%{version}.tar.gz
+License:       BSD
+## AUTOBUILDREQ-BEGIN
+BuildRequires: glibc-devel
+BuildRequires: libgcc
+BuildRequires: libpython3-devel
+BuildRequires: libstdc++6-devel
+## AUTOBUILDREQ-END
+BuildRequires: libpython-devel
+Requires:      python >= %python_version
+
+%description
+%{summary}.
+
+%if 0%{?with_pyver}
+%pyver_package
+%endif
+
+%prep
+%setup -q -n ujson-%{version}
+
+%build
+CFLAGS="%{optflags}" %{__python} setup.py build
+
+%install
+[ "%{buildroot}" != / ] && rm -rf "%{buildroot}"
+%{__python} setup.py install \
+   -O1 --skip-build \
+   --root="%{buildroot}" \
+   --install-headers=%{python_inc} \
+   --install-lib=%{python_sitearch} \
+   --record=%{name}.filelist
+
+sed -i "\,\.egg-info/,d;s,.*/man/.*,&.gz," %{name}.filelist
+
+%files %{?pyappend} -f %{name}.filelist
+%defattr(-,root,root)
+%dir %{python_sitearch}/ujson-%{version}-py*.egg-info
+%{python_sitearch}/ujson-%{version}-py*.egg-info/*
+
+%changelog
+* Mon Apr 12 2021 Silvan Calarco <silvan.calarco@mambasoft.it> 4.0.2-1mamba
+- package created using the webbuild interface