diff --git a/ocaml-libvirt.spec b/ocaml-libvirt.spec
index f322cb6..a5d7133 100644
--- a/ocaml-libvirt.spec
+++ b/ocaml-libvirt.spec
@@ -1,6 +1,6 @@
 Name:           ocaml-libvirt
 Version:        0.6.1.5
-Release:        17%{?dist}
+Release:        18%{?dist}
 Summary:        OCaml binding for libvirt
 License:        LGPLv2+
 
@@ -90,6 +90,9 @@ make install-byte
 
 
 %changelog
+* Mon Oct 04 2021 Richard W.M. Jones <rjones@redhat.com> - 0.6.1.5-18
+- OCaml 4.13.1 build
+
 * Thu Jul 22 2021 Fedora Release Engineering <releng@fedoraproject.org> - 0.6.1.5-17
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_35_Mass_Rebuild