diff --git a/z3.spec b/z3.spec
index f7522b8..bcd4392 100644
--- a/z3.spec
+++ b/z3.spec
@@ -13,7 +13,7 @@
 
 Name:           z3
 Version:        4.12.2
-Release:        5%{?dist}
+Release:        6%{?dist}
 Summary:        Satisfiability Modulo Theories (SMT) solver
 
 License:        MIT
@@ -317,6 +317,9 @@ cd -
 %{python3_sitelib}/z3/
 
 %changelog
+* Thu Jul 27 2023 Jerry James <loganjerry@gmail.com> - 4.12.2-6
+- Rebuild for ocaml-zarith 1.13
+
 * Sat Jul 22 2023 Fedora Release Engineering <releng@fedoraproject.org> - 4.12.2-5
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild