diff --git a/ocaml-benchmark.spec b/ocaml-benchmark.spec
index d0a95a4..fad0da4 100644
--- a/ocaml-benchmark.spec
+++ b/ocaml-benchmark.spec
@@ -1,6 +1,6 @@
 Name:           ocaml-benchmark
 Version:        1.5
-Release:        19%{?dist}
+Release:        20%{?dist}
 Summary:        Benchmarking module for OCaml
 
 License:        LGPLv3+ with exceptions
@@ -75,6 +75,9 @@ dune runtest --profile release
 
 
 %changelog
+* Mon Mar  1 22:00:48 GMT 2021 Richard W.M. Jones <rjones@redhat.com> - 1.5-20
+- OCaml 4.12.0 build
+
 * Tue Jan 26 2021 Fedora Release Engineering <releng@fedoraproject.org> - 1.5-19
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_34_Mass_Rebuild