diff --git a/ocaml-mad.spec b/ocaml-mad.spec
index 3bea606..5af9f8e 100644
--- a/ocaml-mad.spec
+++ b/ocaml-mad.spec
@@ -2,7 +2,7 @@
 
 Name:          ocaml-mad
 Version:       0.5.2
-Release:       1mamba
+Release:       2mamba
 Summary:       OCaml bindings to the MAD mp3 decoder
 Group:         Development/Bindings
 Vendor:        openmamba
@@ -15,10 +15,11 @@ License:       GPL
 BuildRequires: glibc-devel
 BuildRequires: libmad-devel
 BuildRequires: ocaml
+BuildRequires: ocaml-runtime
 ## AUTOBUILDREQ-END
+BuildRequires: ocaml >= 4.14.1
 BuildRequires: gcc
 BuildRequires: pkg-config
-BuildRequires: ocaml
 BuildRequires: ocaml-findlib
 
 %description
@@ -42,7 +43,7 @@ dune build
 
 %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
 
@@ -70,6 +71,9 @@ rm -rf %{buildroot}/usr/doc
 %doc examples/
 
 %changelog
+* Thu Jul 06 2023 Sdk Build System <sdk@mambasoft.it> 0.5.2-2mamba
+- rebuilt with ocaml 4.14.1
+
 * Sun Jan 30 2022 Silvan Calarco <silvan.calarco@mambasoft.it> 0.5.2-1mamba
 - update to 0.5.2