diff --git a/ocaml-ao.spec b/ocaml-ao.spec
index 4669e36..3fed561 100644
--- a/ocaml-ao.spec
+++ b/ocaml-ao.spec
@@ -1,23 +1,23 @@
 %define ocamlpck  ao
 
 Name:          ocaml-ao
-Version:       0.2.0
-Release:       2mamba
+Version:       0.2.3
+Release:       1mamba
 Summary:       OCaml bindings to the ao library
 Group:         Development/Bindings
 Vendor:        openmamba
 Distribution:  openmamba
-Packager:      Davide Madrisan <davide.madrisan@gmail.com>
-URL:           ttp://savonet.sourceforge.net/
-Source:        http://sourceforge.net/projects/savonet/files/ocaml-ao/%{version}/ocaml-ao-%{version}.tar.gz
+Packager:      Silvan Calarco <silvan.calarco@mambasoft.it>
+URL:           https://savonet.sourceforge.net/
+Source:        https://github.com/savonet/ocaml-ao.git/v%{version}/ocaml-ao-%{version}.tar.bz2
 License:       LGPL
 ## AUTOBUILDREQ-BEGIN
 BuildRequires: glibc-devel
 BuildRequires: libao-devel
+BuildRequires: ocaml
 ## AUTOBUILDREQ-END
 BuildRequires: ocaml
 BuildRequires: ocaml-findlib
-BuildRoot:     %{_tmppath}/%{name}-%{version}-root
 
 %description
 OCaml bindings to the alsa library.
@@ -30,27 +30,19 @@ Requires:      %{name} = %{?epoch:%epoch:}%{version}-%{release}
 %description devel
 This package contains libraries and signature files for developing applications that use %{name}.
 
+%debug_package
+
 %prep
 %setup -q
 
 %build
-./configure \
-   --prefix=%{_prefix} \
-   --disable-ldconf
-
-make
-make doc
+dune build
 
 %install
 [ "%{buildroot}" != / ] && rm -rf "%{buildroot}"
-export DESTDIR=%{buildroot}
-export OCAMLFIND_DESTDIR=%{buildroot}$(ocamlfind printconf destdir)
-export DLLDIR=$OCAMLFIND_DESTDIR/stublibs
+DESTDIR=%{buildroot} dune install --prefix "/usr" --libdir "%{_lib}/ocaml"
 
-install -d $OCAMLFIND_DESTDIR/%{ocamlpck}
-install -d $OCAMLFIND_DESTDIR/stublibs
-
-make install
+rm -rf %{buildroot}/usr/doc
 
 %clean
 [ "%{buildroot}" != / ] && rm -rf "%{buildroot}"
@@ -62,6 +54,13 @@ make install
 %{_libdir}/ocaml/%{ocamlpck}/*.cma
 %{_libdir}/ocaml/%{ocamlpck}/*.cmi
 %{_libdir}/ocaml/stublibs/*.so*
+%dir %{_libdir}/ocaml/ao
+%{_libdir}/ocaml/ao/ao.cmt
+%{_libdir}/ocaml/ao/ao.cmti
+%{_libdir}/ocaml/ao/ao.cmxs
+%{_libdir}/ocaml/ao/ao.ml
+%{_libdir}/ocaml/ao/dune-package
+%{_libdir}/ocaml/ao/opam
 %doc COPYING
 
 %files devel
@@ -70,11 +69,12 @@ make install
 %{_libdir}/ocaml/%{ocamlpck}/*.cmxa
 %{_libdir}/ocaml/%{ocamlpck}/*.cmx
 %{_libdir}/ocaml/%{ocamlpck}/*.mli
-%doc CHANGES README
-%doc doc/html/
-%doc examples/
+%doc CHANGES README.md
 
 %changelog
+* Fri Feb 19 2021 Silvan Calarco <silvan.calarco@mambasoft.it> 0.2.3-1mamba
+- update to 0.2.3
+
 * Sun Jun 23 2013 Davide Madrisan <davide.madrisan@gmail.com> 0.2.0-2mamba
 - install dll libs in stublibs because this directory is known by ocaml ans so we do not need to modify ld.conf