diff --git a/libgdither.spec b/libgdither.spec
index 2c00920..538921b 100644
--- a/libgdither.spec
+++ b/libgdither.spec
@@ -1,6 +1,6 @@
 Name:           libgdither
 Version:        0.6
-Release:        20%{?dist}
+Release:        21%{?dist}
 Summary:        Library for applying dithering to PCM audio sources
 
 License:        GPLv2+
@@ -71,6 +71,9 @@ make test CFLAGS="%{optflags} -Werror --std=c99 -I%{_builddir}/%{?buildsubdir}"
 %{_libdir}/pkgconfig/libgdither.pc
 
 %changelog
+* Thu Jul 25 2019 Fedora Release Engineering <releng@fedoraproject.org> - 0.6-21
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_31_Mass_Rebuild
+
 * Sun May 26 2019 David King <amigadave@amigadave.com> - 0.6-20
 - Pass through PREFIX to build system