diff --git a/ocaml-calendar.spec b/ocaml-calendar.spec
index 44ec3c8..b5a4771 100644
--- a/ocaml-calendar.spec
+++ b/ocaml-calendar.spec
@@ -4,7 +4,7 @@
 
 Name:           ocaml-calendar
 Version:        2.04
-Release:        38%{?dist}
+Release:        39%{?dist}
 Summary:        Objective Caml library for managing dates and times
 License:        LGPLv2
 
@@ -78,6 +78,9 @@ make install
 
 
 %changelog
+* Mon Oct 04 2021 Richard W.M. Jones <rjones@redhat.com> - 2.04-39
+- OCaml 4.13.1 build
+
 * Thu Jul 22 2021 Fedora Release Engineering <releng@fedoraproject.org> - 2.04-38
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_35_Mass_Rebuild