diff --git a/ocaml-cudf.spec b/ocaml-cudf.spec
index 7c9e6c9..df3d436 100644
--- a/ocaml-cudf.spec
+++ b/ocaml-cudf.spec
@@ -3,7 +3,7 @@
 
 Name:           ocaml-cudf
 Version:        0.9
-Release:        19%{?dist}
+Release:        20%{?dist}
 Summary:        Format for describing upgrade scenarios
 
 %global libname %(echo %{name} | sed -e 's/^ocaml-//')
@@ -111,6 +111,9 @@ make test
 
 
 %changelog
+* Sat May 30 2020 Richard W.M. Jones <rjones@redhat.com> - 0.9-20
+- Rebuild for updated ocaml-extlib (RHBZ#1837823).
+
 * Tue May 05 2020 Richard W.M. Jones <rjones@redhat.com> - 0.9-19
 - OCaml 4.11.0+dev2-2020-04-22 rebuild