diff --git a/ocaml-gstreamer.spec b/ocaml-gstreamer.spec
index 6a5fac6..f498429 100644
--- a/ocaml-gstreamer.spec
+++ b/ocaml-gstreamer.spec
@@ -2,7 +2,7 @@
 
 Name:          ocaml-gstreamer
 Version:       0.3.1
-Release:       1mamba
+Release:       2mamba
 Summary:       An OCaml interface for the GStreamer Multimedia framework
 Group:         Development/Libraries
 Vendor:        openmamba
@@ -17,11 +17,12 @@ BuildRequires: libglib-devel
 BuildRequires: libgst-plugins-base-devel
 BuildRequires: libgstreamer-devel
 BuildRequires: ocaml
+BuildRequires: ocaml-runtime
 ## AUTOBUILDREQ-END
+BuildRequires: ocaml >= 4.14.1
 BuildRequires: dune
 BuildRequires: gcc
 BuildRequires: pkg-config
-BuildRequires: ocaml
 BuildRequires: ocaml-findlib
 
 %description
@@ -45,7 +46,7 @@ dune build --profile release
 
 %install
 [ "%{buildroot}" != / ] && rm -rf "%{buildroot}"
-DESTDIR=%{buildroot} dune install --prefix "/usr" --libdir "%{_lib}/ocaml"
+DESTDIR=%{buildroot} dune install --prefix "/usr" --libdir "%{_libdir}/ocaml"
 
 rm -rf %{buildroot}/usr/doc
 
@@ -73,6 +74,9 @@ rm -rf %{buildroot}/usr/doc
 %doc CHANGES README.md
 
 %changelog
+* Fri Jul 07 2023 Sdk Build System <sdk@mambasoft.it> 0.3.1-2mamba
+- rebuilt with ocaml 4.14.1
+
 * Fri Feb 26 2021 Silvan Calarco <silvan.calarco@mambasoft.it> 0.3.1-1mamba
 - update to 0.3.1