diff --git a/ocaml-bjack.spec b/ocaml-bjack.spec
index 23e980f..7636361 100644
--- a/ocaml-bjack.spec
+++ b/ocaml-bjack.spec
@@ -2,7 +2,7 @@
 
 Name:          ocaml-bjack
 Version:       0.1.6
-Release:       1mamba
+Release:       2mamba
 Summary:       OCaml blocking JACK API
 Group:         System/Libraries/OCaml
 Vendor:        openmamba
@@ -16,9 +16,10 @@ BuildRequires: glibc-devel
 BuildRequires: libjack-devel
 BuildRequires: libsamplerate-devel
 BuildRequires: ocaml
+BuildRequires: ocaml-runtime
 ## AUTOBUILDREQ-END
+BuildRequires: ocaml >= 4.14.1
 BuildRequires: dune
-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
 
@@ -69,5 +70,8 @@ rm -rf %{buildroot}/usr/doc
 %doc CHANGES* README.md
 
 %changelog
+* Thu Jul 06 2023 Sdk Build System <sdk@mambasoft.it> 0.1.6-2mamba
+- rebuilt with ocaml 4.14.1
+
 * Fri Feb 11 2022 Silvan Calarco <silvan.calarco@mambasoft.it> 0.1.6-1mamba
 - package created using the webbuild interface