diff --git a/README.md b/README.md
index 65a7494..7087dbd 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,4 @@
 # nlohmann-json
 
+JSON for Modern C++.
+
diff --git a/nlohmann-json.spec b/nlohmann-json.spec
new file mode 100644
index 0000000..5823be6
--- /dev/null
+++ b/nlohmann-json.spec
@@ -0,0 +1,56 @@
+Name:          nlohmann-json
+Version:       3.11.2
+Release:       1mamba
+Summary:       JSON for Modern C++
+Group:         Development/Libraries
+Vendor:        openmamba
+Distribution:  openmamba
+Packager:      Silvan Calarco <silvan.calarco@mambasoft.it>
+URL:           https://json.nlohmann.me/
+Source:        https://github.com/nlohmann/json.git/v%{version}/json-%{version}.tar.bz2
+License:       MIT
+## AUTOBUILDREQ-BEGIN
+## AUTOBUILDREQ-END
+
+%description
+JSON for Modern C++.
+
+%package -n lib%{name}-devel
+Group:         Development/Libraries
+Summary:       JSON for Modern C++ (header only library)
+Requires:      pkg-config
+
+%description -n lib%{name}-devel
+JSON for Modern C++ (header only library).
+This package contains header files for developing applications that use %{name}.
+
+#% debug_package
+
+%prep
+%setup -q -n json-%{version}
+
+%build
+%cmake -d build \
+   -DJSON_BuildTests=OFF
+
+%make
+
+%install
+[ "%{buildroot}" != / ] && rm -rf "%{buildroot}"
+%makeinstall -C build
+
+%clean
+[ "%{buildroot}" != / ] && rm -rf "%{buildroot}"
+
+%files -n lib%{name}-devel
+%defattr(-,root,root)
+%dir %{_includedir}/nlohmann
+%{_includedir}/nlohmann/*
+%dir %{_datadir}/cmake/nlohmann_json
+%{_datadir}/cmake/nlohmann_json/nlohmann_json*.cmake
+%{_datadir}/pkgconfig/nlohmann_json.pc
+%doc LICENSE.MIT ChangeLog.md README.md
+
+%changelog
+* Thu Sep 01 2022 Silvan Calarco <silvan.calarco@mambasoft.it> 3.11.2-1mamba
+- package created using the webbuild interface