diff --git a/dtdparser.spec b/dtdparser.spec
index 64fd22c..6deec56 100644
--- a/dtdparser.spec
+++ b/dtdparser.spec
@@ -30,7 +30,7 @@
 
 Name:           dtdparser
 Version:        1.21
-Release:        23%{?dist}
+Release:        24%{?dist}
 Summary:        A Java DTD Parser
 
 # The code has no license attribution.
@@ -86,6 +86,9 @@ ant build createdoc
 %license LICENSE ASL_LICENSE
 
 %changelog
+* Wed Jul 24 2019 Fedora Release Engineering <releng@fedoraproject.org> - 1.21-24
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_31_Mass_Rebuild
+
 * Fri Feb 08 2019 Mat Booth <mat.booth@redhat.com> - 1.21-23
 - Install with xmvn and drop deprecated macros