diff --git a/ocaml-calendar.spec b/ocaml-calendar.spec
index dcdcb39..004b7a1 100644
--- a/ocaml-calendar.spec
+++ b/ocaml-calendar.spec
@@ -4,7 +4,7 @@
 
 Name:           ocaml-calendar
 Version:        2.04
-Release:        20%{?dist}
+Release:        21%{?dist}
 Summary:        Objective Caml library for managing dates and times
 License:        LGPLv2
 
@@ -77,6 +77,9 @@ make install
 
 
 %changelog
+* Thu Jul 25 2019 Fedora Release Engineering <releng@fedoraproject.org> - 2.04-21
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_31_Mass_Rebuild
+
 * Thu Jun 27 2019 Richard W.M. Jones <rjones@redhat.com> - 2.04-20
 - OCaml 4.08.0 (final) rebuild.