diff --git a/ocaml-calendar.spec b/ocaml-calendar.spec
index f2f647c..5f867df 100644
--- a/ocaml-calendar.spec
+++ b/ocaml-calendar.spec
@@ -4,7 +4,7 @@
 
 Name:           ocaml-calendar
 Version:        2.04
-Release:        12%{?dist}
+Release:        13%{?dist}
 Summary:        Objective Caml library for managing dates and times
 License:        LGPLv2
 
@@ -77,6 +77,9 @@ make install
 
 
 %changelog
+* Tue Nov 07 2017 Richard W.M. Jones <rjones@redhat.com> - 2.04-13
+- OCaml 4.06.0 rebuild.
+
 * Mon Aug 07 2017 Richard W.M. Jones <rjones@redhat.com> - 2.04-12
 - OCaml 4.05.0 rebuild.