diff --git a/rubygem-gdk3.spec b/rubygem-gdk3.spec
index 3d3800d..cd5eeb1 100644
--- a/rubygem-gdk3.spec
+++ b/rubygem-gdk3.spec
@@ -8,7 +8,7 @@
 Summary:	Ruby binding of GDK-3.x
 Name:		rubygem-%{gem_name}
 Version:	3.4.3
-Release:	1%{?dist}
+Release:	2%{?dist}
 
 # Various files in gem
 License:	LGPLv2+
@@ -170,6 +170,9 @@ popd
 %exclude	%{gem_instdir}/test/
 
 %changelog
+* Wed Jan 06 2021 Mamoru TASAKA <mtasaka@fedoraproject.org> - 3.4.3-2
+- F-34: rebuild against ruby 3.0
+
 * Thu Aug 13 2020 Mamoru TASAKA <mtasaka@fedoraproject.org> - 3.4.3-1
 - 3.4.3