diff --git a/ipv6calc.spec b/ipv6calc.spec
index c3596f3..001f798 100644
--- a/ipv6calc.spec
+++ b/ipv6calc.spec
@@ -16,7 +16,7 @@
 Summary:	IPv6 address format change and calculation utility
 Name:		ipv6calc
 Version:	4.0.1
-Release:	65%{?gittag}%{?dist}
+Release:	66%{?gittag}%{?dist}
 URL:		http://www.deepspace6.net/projects/%{name}.html
 License:	GPLv2
 %if 0%{?gitcommit:1}
@@ -346,6 +346,9 @@ fi
 
 
 %changelog
+* Thu Jul 21 2022 Fedora Release Engineering <releng@fedoraproject.org> - 4.0.1-66
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_37_Mass_Rebuild
+
 * Tue May 31 2022 Jitka Plesnikova <jplesnik@redhat.com> - 4.0.1-65
 - Perl 5.36 rebuild