diff --git a/README.md b/README.md
index 8182525..e5d43f5 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,4 @@
 # ocaml-integers
 
+The ocaml-integers library provides a number of 8-, 16-, 32- and 64-bit signed and unsigned integer types, together with aliases such as `long` and `size_t` whose sizes depend on the host platform.
+
diff --git a/ocaml-integers.spec b/ocaml-integers.spec
new file mode 100644
index 0000000..7c3b6d9
--- /dev/null
+++ b/ocaml-integers.spec
@@ -0,0 +1,53 @@
+Name:          ocaml-integers
+Version:       0.2.2
+Release:       1mamba
+Summary:       Various signed and unsigned integer types for OCaml
+Group:         System/Libraries/OCaml
+Vendor:        openmamba
+Distribution:  openmamba
+Packager:      Silvan Calarco <silvan.calarco@mambasoft.it>
+URL:           https://github.com/ocamllabs/ocaml-integers
+## GITSOURCE https://github.com/ocamllabs/ocaml-integers.git 0.3.0
+Source:        https://github.com/ocamllabs/ocaml-integers.git/v%{version}/ocaml-integers-%{version}.tar.bz2
+License:       MIT
+## AUTOBUILDREQ-BEGIN
+BuildRequires: glibc-devel
+## AUTOBUILDREQ-END
+BuildRequires: dune
+BuildRequires: ocaml
+BuildRequires: opam
+BuildRequires: ocaml-topkg
+BuildRoot:     %{_tmppath}/%{name}-%{version}-root
+
+%description
+The ocaml-integers library provides a number of 8-, 16-, 32- and 64-bit signed and unsigned integer types, together with aliases such as `long` and `size_t` whose sizes depend on the host platform.
+
+%prep
+%setup -q
+
+%build
+%make
+
+%install
+[ "%{buildroot}" != / ] && rm -rf "%{buildroot}"
+opam-installer \
+    --prefix=%{buildroot}%{_prefix} \
+    --libdir=%{buildroot}$(ocamlc -where) \
+    --docdir=%{buildroot}%{_docdir} \
+    --stubsdir=%{buildroot}$(ocamlc -where)/stublibs
+
+%clean
+[ "%{buildroot}" != / ] && rm -rf "%{buildroot}"
+
+%files
+%defattr(-,root,root)
+%dir %{_libdir}/ocaml/integers
+%{_libdir}/ocaml/integers/*
+%{_libdir}/ocaml/stublibs/dllintegers.so
+%dir %{_datadir}/doc/integers
+%{_datadir}/doc/integers/*
+%doc LICENSE.md
+
+%changelog
+* Sun May 05 2019 Silvan Calarco <silvan.calarco@mambasoft.it> 0.2.2-1mamba
+- package created using the webbuild interface