diff --git a/libkolabxml.spec b/libkolabxml.spec
index a63ae66..15fab48 100644
--- a/libkolabxml.spec
+++ b/libkolabxml.spec
@@ -48,7 +48,7 @@
 
 Name:           libkolabxml
 Version:        1.2.0
-Release:        20%{?dist}
+Release:        21%{?dist}
 Summary:        Kolab XML format collection parser library
 
 License:        LGPLv3+
@@ -251,6 +251,9 @@ popd
 
 
 %changelog
+* Sun Jan 21 2024 Fedora Release Engineering <releng@fedoraproject.org> - 1.2.0-21
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild
+
 * Wed Jan 17 2024 Jonathan Wakely <jwakely@redhat.com> - 1.2.0-20
 - Rebuilt for Boost 1.83