diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 002f9ba..d9dab66 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -12,7 +12,7 @@ jobs:
       LC_ALL: en_US.UTF-8 # consistent sort order
 
     strategy:
-      matrix: { ruby: ['3.0', '3.1', '3.2', '3.3'] }
+      matrix: { ruby: ['3.1', '3.2', '3.3', '3.4'] }
 
     steps:
     - name: Checkout code
diff --git a/.rubocop.yml b/.rubocop.yml
index 8897984..7496a8a 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -8,7 +8,7 @@ inherit_gem:
     - rspec.yml
 
 AllCops:
-  TargetRubyVersion: 3.0
+  TargetRubyVersion: 3.1
   SuggestExtensions: false
   Exclude:
     - 'dev/**/*'
diff --git a/gtx.gemspec b/gtx.gemspec
index da3df97..bb917be 100644
--- a/gtx.gemspec
+++ b/gtx.gemspec
@@ -12,7 +12,7 @@ Gem::Specification.new do |s|
   s.files       = Dir['README.md', 'lib/**/*.*']
   s.homepage    = 'https://github.com/dannyben/gtx'
   s.license     = 'MIT'
-  s.required_ruby_version = '>= 3.0'
+  s.required_ruby_version = '>= 3.1'
 
   s.add_dependency 'erb', '~> 4.0'