diff --git a/ocaml-lame.spec b/ocaml-lame.spec
index c92a07e..5483cf8 100644
--- a/ocaml-lame.spec
+++ b/ocaml-lame.spec
@@ -1,24 +1,23 @@
 %define ocamlpck  lame
 
 Name:          ocaml-lame
-Version:       0.3.2
+Version:       0.3.5
 Release:       1mamba
 Summary:       OCaml bindings to the LAME mp3 encoder
-Group:         Development/Bindings
+Group:         System/Libraries/OCaml
 Vendor:        openmamba
 Distribution:  openmamba
-Packager:      openmamba WebBuild System <webbuild@openmamba.org>
-URL:           http://savonet.sourceforge.net/
-Source:        http://sourceforge.net/projects/savonet/files/ocaml-lame/%{version}/ocaml-lame-%{version}.tar.gz
+Packager:      Silvan Calarco <silvan.calarco@mambasoft.it>
+URL:           https://github.com/savonet/ocaml-lame
+Source:        https://github.com/savonet/ocaml-lame.git/v%{version}/ocaml-lame-%{version}.tar.bz2
 License:       GPL
 ## AUTOBUILDREQ-BEGIN
 BuildRequires: liblame-devel
-## note: run 'autospec -u -a6 ocaml-lame' to get the list of build requirements.
 ## AUTOBUILDREQ-END
+BuildRequires: dune
 BuildRequires: ocaml
 BuildRequires: ocaml-findlib
 BuildRequires: camlidl
-BuildRoot:     %{_tmppath}/%{name}-%{version}-root
 
 %description
 OCaml bindings for the lame librar.
@@ -31,27 +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}"
@@ -59,10 +50,11 @@ make install
 %files
 %defattr(-,root,root)
 %dir %{_libdir}/ocaml/%{ocamlpck}
-%{_libdir}/ocaml/%{ocamlpck}/META
-%{_libdir}/ocaml/%{ocamlpck}/*.cma
-%{_libdir}/ocaml/%{ocamlpck}/*.cmi
-%{_libdir}/ocaml/%{ocamlpck}/*.cmxs
+%{_libdir}/ocaml/%{ocamlpck}/*
+%exclude %{_libdir}/ocaml/%{ocamlpck}/*.a
+%exclude %{_libdir}/ocaml/%{ocamlpck}/*.cmxa
+%exclude %{_libdir}/ocaml/%{ocamlpck}/*.cmx
+%exclude %{_libdir}/ocaml/%{ocamlpck}/*.mli
 %{_libdir}/ocaml/stublibs/*.so*
 %doc COPYING
 
@@ -72,9 +64,11 @@ make install
 %{_libdir}/ocaml/%{ocamlpck}/*.cmxa
 %{_libdir}/ocaml/%{ocamlpck}/*.cmx
 %{_libdir}/ocaml/%{ocamlpck}/*.mli
-%doc CHANGES README
-%doc doc/html/
+%doc CHANGES README.md
 
 %changelog
+* Sun Jan 30 2022 Silvan Calarco <silvan.calarco@mambasoft.it> 0.3.5-1mamba
+- update to 0.3.5
+
 * Sat Jun 29 2013 openmamba WebBuild System <webbuild@openmamba.org> 0.3.2-1mamba
 - package created by davide using the webbuild interface