diff --git a/ocaml-calendar.spec b/ocaml-calendar.spec
index 980eed5..0e30e41 100644
--- a/ocaml-calendar.spec
+++ b/ocaml-calendar.spec
@@ -7,7 +7,7 @@ ExcludeArch: %{ix86}
 Name:           ocaml-calendar
 Epoch:          1
 Version:        2.04
-Release:        46%{?dist}
+Release:        47%{?dist}
 Summary:        Objective Caml library for managing dates and times
 License:        LGPLv2
 
@@ -36,7 +36,7 @@ Objective Caml library for managing dates and times.
 
 %package        devel
 Summary:        Development files for %{name}
-Requires:       %{name} = %{version}-%{release}
+Requires:       %{name} = %{epoch}:%{version}-%{release}
 
 
 %description    devel
@@ -83,6 +83,9 @@ make install
 
 
 %changelog
+* Fri May 31 2024 Richard W.M. Jones <rjones@redhat.com> - 2.04-47
+- Revert back to ocaml-calendar 2.04 for RHEL 10
+
 * Tue Jan 24 2023 Richard W.M. Jones <rjones@redhat.com> - 2.04-46
 - Rebuild OCaml packages for F38