diff --git a/volpack.spec b/volpack.spec
index c8bac72..a3981c1 100644
--- a/volpack.spec
+++ b/volpack.spec
@@ -1,6 +1,6 @@
 Name:          volpack
 Version:       1.0c7
-Release:       22%{?dist}
+Release:       23%{?dist}
 Summary:       Portable library for fast volume rendering
 License:       BSD
 URL:           http://amide.sourceforge.net
@@ -80,6 +80,9 @@ popd
 
 
 %changelog
+* Wed Jan 27 2021 Fedora Release Engineering <releng@fedoraproject.org> - 1.0c7-23
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_34_Mass_Rebuild
+
 * Wed Jul 29 2020 Fedora Release Engineering <releng@fedoraproject.org> - 1.0c7-22
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_33_Mass_Rebuild