diff --git a/ocaml-biniou.spec b/ocaml-biniou.spec
index 26c28e0..1940730 100644
--- a/ocaml-biniou.spec
+++ b/ocaml-biniou.spec
@@ -6,7 +6,7 @@
 
 Name:           ocaml-%{libname}
 Version:        1.2.1
-Release:        5%{?dist}
+Release:        6%{?dist}
 Summary:        Safe and fast binary data format
 
 License:        BSD
@@ -97,6 +97,9 @@ make test
 
 
 %changelog
+* Fri Apr 03 2020 Richard W.M. Jones <rjones@redhat.com> - 1.2.1-6
+- Update all OCaml dependencies for RPM 4.16.
+
 * Wed Feb 26 2020 Richard W.M. Jones <rjones@redhat.com> - 1.2.1-5
 - OCaml 4.10.0 final.