diff --git a/ocaml-ao.spec b/ocaml-ao.spec
index b0355f2..9c2290c 100644
--- a/ocaml-ao.spec
+++ b/ocaml-ao.spec
@@ -2,7 +2,7 @@
 
 Name:          ocaml-ao
 Version:       0.2.4
-Release:       1mamba
+Release:       2mamba
 Summary:       OCaml bindings to the ao library
 Group:         Development/Bindings
 Vendor:        openmamba
@@ -15,8 +15,9 @@ License:       LGPL
 BuildRequires: glibc-devel
 BuildRequires: libao-devel
 BuildRequires: ocaml
+BuildRequires: ocaml-runtime
 ## AUTOBUILDREQ-END
-BuildRequires: ocaml
+BuildRequires: ocaml >= 4.14.1
 BuildRequires: ocaml-findlib
 
 %description
@@ -40,7 +41,7 @@ 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
 
@@ -72,6 +73,9 @@ rm -rf %{buildroot}/usr/doc
 %doc CHANGES README.md
 
 %changelog
+* Thu Jul 06 2023 Sdk Build System <sdk@mambasoft.it> 0.2.4-2mamba
+- rebuilt with ocaml 4.14.1
+
 * Sun Jan 30 2022 Silvan Calarco <silvan.calarco@mambasoft.it> 0.2.4-1mamba
 - update to 0.2.4