diff --git a/ruby-shadow-2.5.1-cflags.patch b/ruby-shadow-2.5.1-cflags.patch
index 830334d..6c0a474 100644
--- a/ruby-shadow-2.5.1-cflags.patch
+++ b/ruby-shadow-2.5.1-cflags.patch
@@ -8,4 +8,4 @@
 +$CFLAGS = "#{$CFLAGS} " + case RUBY_VERSION
            when /^1\.9/; '-DRUBY19'
            when /^2\./; '-DRUBY19'
-           when /^3\./; '-DRUBY19 -DRUBY30'
+           when /^[34]\./; '-DRUBY19 -DRUBY30'
diff --git a/ruby-shadow-2.5.1-taintedness-ruby32-removal.patch b/ruby-shadow-2.5.1-taintedness-ruby32-removal.patch
index 1a9b09e..737f08b 100644
--- a/ruby-shadow-2.5.1-taintedness-ruby32-removal.patch
+++ b/ruby-shadow-2.5.1-taintedness-ruby32-removal.patch
@@ -18,7 +18,7 @@ index d17f926..04f8f97 100644
            when /^1\.9/; '-DRUBY19'
            when /^2\./; '-DRUBY19'
 -          when /^3\./; '-DRUBY19'
-+          when /^3\./; '-DRUBY19 -DRUBY30'
++          when /^[34]\./; '-DRUBY19 -DRUBY30'
            else; ''
            end
  
diff --git a/rubygem-ruby-shadow.spec b/rubygem-ruby-shadow.spec
index 3931ad7..b84dfec 100644
--- a/rubygem-ruby-shadow.spec
+++ b/rubygem-ruby-shadow.spec
@@ -2,7 +2,7 @@
 
 Name:           rubygem-%{gem_name}
 Version:        2.5.1
-Release:        12%{?dist}
+Release:        13%{?dist}
 Summary:        Ruby shadow password module
 License:        LicenseRef-Fedora-UltraPermissive OR Unlicense
 URL:            https://github.com/apalmblad/ruby-shadow
@@ -86,6 +86,9 @@ popd
 %doc %{gem_instdir}/README.euc
 
 %changelog
+* Sat Nov 08 2025 Mamoru TASAKA <mtasaka@fedoraproject.org> - 2.5.1-13
+- Adjust patches for ruby4_0
+
 * Fri Jul 25 2025 Fedora Release Engineering <releng@fedoraproject.org> - 2.5.1-12
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_43_Mass_Rebuild