diff --git a/dune.spec b/dune.spec
index f6847b8..da1df91 100644
--- a/dune.spec
+++ b/dune.spec
@@ -1,5 +1,5 @@
 Name:          dune
-Version:       2.9.0
+Version:       2.9.1
 Release:       1mamba
 Summary:       A composable build system for OCaml
 Group:         Development/Tools
@@ -10,6 +10,7 @@ URL:           https://dune.build/
 Source:        https://github.com/ocaml/dune.git/%{version}/dune-%{version}.tar.bz2
 License:       MIT
 ## AUTOBUILDREQ-BEGIN
+#libdl.so.2()(64bit): /usr/lib64/libdl.so: file not owned by any package
 BuildRequires: glibc-devel
 BuildRequires: ocaml
 BuildRequires: ocaml-csexp
@@ -90,6 +91,9 @@ mv %{buildroot}%{_prefix}/doc %{buildroot}%{_datadir}
 %{_docdir}/dune-site/*
 
 %changelog
+* Wed Sep 08 2021 Automatic Build System <autodist@mambasoft.it> 2.9.1-1mamba
+- automatic version update by autodist
+
 * Sat Jul 03 2021 Automatic Build System <autodist@mambasoft.it> 2.9.0-1mamba
 - automatic version update by autodist