diff --git a/rubygem-gtk3.spec b/rubygem-gtk3.spec
index 44fde29..1b055c4 100644
--- a/rubygem-gtk3.spec
+++ b/rubygem-gtk3.spec
@@ -7,8 +7,8 @@
 # Planned for F-20+ only
 Summary:	Ruby/GTK3 is a Ruby binding of GTK+-3.x
 Name:		rubygem-%{gem_name}
-Version:	4.3.4
-Release:	2%{?dist}
+Version:	4.2.5
+Release:	1%{?dist}
 
 # SPDX confirmed
 # LGPL-2.1-or-later: gemspec
@@ -82,11 +82,7 @@ mv ../%{gem_name}-%{version}.gemspec .
 find . -name \*.rb -print0 | xargs --null chmod 0644
 
 # Allow ruby-gnome2 no less than ones
-sed -i -e 's|= 4\.3\.4|>= 4.3.4|' %{gem_name}-%{version}.gemspec
-
-# Remove unneeded rake runtime dependency
-sed -i %{gem_name}-%{version}.gemspec \
-	-e '\@add_runtime_dependency.*rake@d'
+sed -i -e 's|= 4\.2\.5|>= 4.2.5|' %{gem_name}-%{version}.gemspec
 
 # Add license text
 install -cpm 644 %{SOURCE1} ./COPYING.LIB
@@ -127,14 +123,6 @@ rm -f .%{gem_instdir}/extconf.rb
 popd
 
 %check
-# ref: https://bugzilla.redhat.com/show_bug.cgi?id=2275913
-# glycin on ppc64le is currently unusable
-%if 0%{?fedora} >= 43
-%ifarch ppc64le
-exit 0
-%endif
-%endif
-
 pushd .%{gem_instdir}
 
 tar xf %{SOURCE2}
@@ -202,45 +190,6 @@ popd
 %exclude	%{gem_instdir}/test/
 
 %changelog
-* Thu Jan 08 2026 Mamoru TASAKA <mtasaka@fedoraproject.org> - 4.3.4-2
-- Rebuild for https://fedoraproject.org/wiki/Changes/Ruby_4.0
-
-* Sat Dec 06 2025 Mamoru TASAKA <mtasaka@fedoraproject.org> - 4.3.4-1
-- 4.3.4
-
-* Mon Aug 18 2025 Mamoru TASAKA <mtasaka@fedoraproject.org> - 4.3.3-1
-- 4.3.3
-
-* Sat Aug 16 2025 Mamoru TASAKA <mtasaka@fedoraproject.org> - 4.3.2-1
-- 4.3.2
-
-* Tue Aug 12 2025 Mamoru TASAKA <mtasaka@fedoraproject.org> - 4.3.0-3
-- Exclude tests on glycin ppc64le for now (bug 2275913)
-
-* Fri Jul 25 2025 Fedora Release Engineering <releng@fedoraproject.org> - 4.3.0-2
-- Rebuilt for https://fedoraproject.org/wiki/Fedora_43_Mass_Rebuild
-
-* Tue Jul 15 2025 Mamoru TASAKA <mtasaka@fedoraproject.org> - 4.3.0-1
-- 4.3.0
-
-* Sat Mar 22 2025 Mamoru TASAKA <mtasaka@fedoraproject.org> - 4.2.9-1
-- 4.2.9
-
-* Thu Mar 20 2025 Mamoru TASAKA <mtasaka@fedoraproject.org> - 4.2.8-1
-- 4.2.8
-
-* Thu Jan 30 2025 Mamoru TASAKA <mtasaka@fedoraproject.org> - 4.2.7-1
-- 4.2.7
-
-* Sun Jan 26 2025 Mamoru TASAKA <mtasaka@fedoraproject.org> - 4.2.6-1
-- 4.2.6
-
-* Sat Jan 18 2025 Fedora Release Engineering <releng@fedoraproject.org> - 4.2.5-3
-- Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild
-
-* Tue Jan 07 2025 Mamoru TASAKA <mtasaka@fedoraproject.org> - 4.2.5-2
-- Rebuild for https://fedoraproject.org/wiki/Changes/Ruby_3.4
-
 * Sun Dec 15 2024 Mamoru TASAKA <mtasaka@fedoraproject.org> - 4.2.5-1
 - 4.2.5
 
diff --git a/sources b/sources
index f9cdd91..b924e2f 100644
--- a/sources
+++ b/sources
@@ -1,2 +1,2 @@
-SHA512 (gtk3-4.3.4.gem) = a3eaef0866d8183f3c6402b5d69f16f5711227c4676ba5749fdee384b76f6f819739fd3f72a33b1b96858b88bdf4984ea19071c412f2e60d9d03a953ba7f36ae
-SHA512 (gtk3-4.3.4-test-missing-files.tar.gz) = f0f79f5c33b391f479a8cf88b98190b62a6016abdd4b44b95346faadd09a8715105250abcad33316ee3b79a67857f801c980dcd8fc1b570456d7e7a6b9cd8ad5
+SHA512 (gtk3-4.2.5.gem) = 6ed2334d4b30e265cbb90b5799fb2b01ecf4c77175dcad67b6d2092972b1cd233a69682dc5bca8aa4639a0c1a71cc4d03d3da89f9e9b187eb6fa21295b2b3ff4
+SHA512 (gtk3-4.2.5-test-missing-files.tar.gz) = 524e3059dab1468d05175b8be54d91029508a9e0ccca1d10fd8f3b9793fc0aa23b7889e076827bfaffb9cd458171b7a5e317917e3c150710cc2e5b47d3010bbc