diff --git a/.github/workflows/ruby.yml b/.github/workflows/ruby.yml
index 56b52be..439a84a 100644
--- a/.github/workflows/ruby.yml
+++ b/.github/workflows/ruby.yml
@@ -20,7 +20,7 @@ jobs:
 
     strategy:
       matrix:
-        ruby: ["3.1", "3.2", "3.3", "3.4"]
+        ruby: ["3.2", "3.3", "3.4"]
 
     steps:
       - uses: actions/checkout@v5
@@ -60,7 +60,7 @@ jobs:
       - name: Set up Ruby
         uses: ruby/setup-ruby@v1
         with:
-          ruby-version: "3.2"
+          ruby-version: "3.3"
           bundler-cache: true
       - name: Run RuboCop
         run: bundle exec rubocop -P
diff --git a/.rubocop.yml b/.rubocop.yml
index 705e93c..62c778f 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -5,7 +5,7 @@ plugins:
 
 AllCops:
   NewCops: enable
-  TargetRubyVersion: 3.1
+  TargetRubyVersion: 3.2
 
 # Put development dependencies in the gemspec so rubygems.org knows about them
 Gemspec/DevelopmentDependencies:
diff --git a/ghtml2pdf.gemspec b/ghtml2pdf.gemspec
index ee95f3c..57f758d 100644
--- a/ghtml2pdf.gemspec
+++ b/ghtml2pdf.gemspec
@@ -14,7 +14,7 @@ Gem::Specification.new do |spec|
   spec.homepage = "https://github.com/mvz/ghtml2pdf"
   spec.license = "MIT"
 
-  spec.required_ruby_version = ">= 3.1.0"
+  spec.required_ruby_version = ">= 3.2.0"
 
   spec.metadata["homepage_uri"] = spec.homepage
   spec.metadata["source_code_uri"] = "https://github.com/mvz/ghtml2pdf"