diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..fb49fff
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,25 @@
+name: CI
+
+on: [push, pull_request]
+
+jobs:
+  test:
+
+    runs-on: ubuntu-latest
+
+    strategy:
+      fail-fast: false
+      matrix:
+        ruby: ["2.5", "2.6", "2.7", "3.0", "3.1", ruby-head, jruby-9.2, jruby-9.3]
+        rubocop_version: ["0.86", "1.20"]
+    env:
+      BUNDLE_GEMFILE: "gemfiles/rubocop_${{ matrix.rubocop_version }}.gemfile"
+    steps:
+    - uses: actions/checkout@v2
+    - name: Set up Ruby
+      uses: ruby/setup-ruby@v1
+      with:
+        bundler-cache: true # 'bundle install' and cache gems
+        ruby-version: ${{ matrix.ruby }}
+    - name: Run tests
+      run: bundle exec rspec
diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
new file mode 100644
index 0000000..fb56815
--- /dev/null
+++ b/.github/workflows/lint.yml
@@ -0,0 +1,19 @@
+name: Lint 
+
+on: [push, pull_request]
+
+jobs:
+  lint:
+
+    runs-on: ubuntu-latest
+    name: Rubocop
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Set up Ruby
+      uses: ruby/setup-ruby@v1
+      with:
+        bundler-cache: true # 'bundle install' and cache gems
+        ruby-version: "2.7" 
+    - name: Run Rubocop 
+      run: bundle exec rubocop
diff --git a/.rubocop.yml b/.rubocop.yml
index c105295..338a541 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -1,6 +1,6 @@
 AllCops:
   DisplayCopNames: true
-  TargetRubyVersion: 2.3
+  TargetRubyVersion: 2.5
 
 Lint/RaiseException:
   Enabled: true
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index 0f5b904..0000000
--- a/.travis.yml
+++ /dev/null
@@ -1,64 +0,0 @@
-cache: bundler
-language: ruby
-rvm:
-  - jruby-9.2.9.0
-  - 2.3.0
-  - 2.4
-  - 2.5
-  - 2.6
-  - 2.7
-  - 3.0
-
-gemfile:
-  - gemfiles/rubocop_0.53.gemfile
-  - gemfiles/rubocop_0.81.gemfile
-  - gemfiles/rubocop_0.86.gemfile
-  - gemfiles/rubocop_1.20.gemfile
-
-script_rubocop: &script_rubocop
-  - bundle exec rspec
-  - bundle exec rubocop
-
-jobs:
-  fast_finish: true
-  exclude:
-  - rvm: 2.3.0
-    gemfile: gemfiles/rubocop_0.86.gemfile
-  - rvm: 2.3.0
-    gemfile: gemfiles/rubocop_1.20.gemfile
-  - rvm: 2.5
-    gemfile: gemfiles/rubocop_0.53.gemfile
-  - rvm: 2.6
-    gemfile: gemfiles/rubocop_0.53.gemfile
-  - rvm: 2.7
-    gemfile: gemfiles/rubocop_0.53.gemfile
-  - rvm: 3.0
-    gemfile: gemfiles/rubocop_0.53.gemfile
-  include:
-  - rvm: jruby-9.2.9.0
-    gemfile: gemfiles/rubocop_0.81.gemfile
-    script: *script_rubocop
-  - rvm: 2.3.0
-    gemfile: gemfiles/rubocop_0.81.gemfile
-    script: *script_rubocop
-  - rvm: 2.4
-    gemfile: gemfiles/rubocop_0.81.gemfile
-    script: *script_rubocop
-  - rvm: 2.5
-    gemfile: gemfiles/rubocop_0.81.gemfile
-    script: *script_rubocop
-  - rvm: 2.6
-    gemfile: gemfiles/rubocop_0.81.gemfile
-    script: *script_rubocop
-  - rvm: 2.7
-    gemfile: gemfiles/rubocop_0.81.gemfile
-    script: *script_rubocop
-  - rvm: 3.0
-    gemfile: gemfiles/rubocop_0.81.gemfile
-    script: *script_rubocop
-
-before_install: gem install --remote bundler
-install:
-  - bundle install --retry=3
-script:
-  - bundle exec rspec
diff --git a/Appraisals b/Appraisals
index 16c30cb..60202ec 100644
--- a/Appraisals
+++ b/Appraisals
@@ -1,23 +1,9 @@
 # frozen_string_literal: true
 
-appraise 'rubocop-0.53' do
-  gem 'rubocop', '~> 0.53.0'
+appraise 'rubocop-0.86' do
+  gem 'rubocop', '~> 0.86.0'
 end
 
-appraise 'rubocop-0.81' do
-  gem 'rubocop', '~> 0.81.0'
-end
-
-if Gem::Requirement.new('>= 2.4.0')
-                   .satisfied_by?(Gem::Version.new(RUBY_VERSION))
-  appraise 'rubocop-0.86' do
-    gem 'rubocop', '~> 0.86.0'
-  end
-end
-
-if Gem::Requirement.new('>= 2.5.0')
-                   .satisfied_by?(Gem::Version.new(RUBY_VERSION))
-  appraise 'rubocop-1.20' do
-    gem 'rubocop', '~> 1.20.0'
-  end
+appraise 'rubocop-1.20' do
+  gem 'rubocop', '~> 1.20.0'
 end
diff --git a/gemfiles/rubocop_0.53.gemfile b/gemfiles/rubocop_0.53.gemfile
deleted file mode 100644
index 55b8330..0000000
--- a/gemfiles/rubocop_0.53.gemfile
+++ /dev/null
@@ -1,7 +0,0 @@
-# This file was generated by Appraisal
-
-source "https://rubygems.org"
-
-gem "rubocop", "~> 0.53.0"
-
-gemspec path: "../"
diff --git a/gemfiles/rubocop_0.81.gemfile b/gemfiles/rubocop_0.81.gemfile
deleted file mode 100644
index 65788b6..0000000
--- a/gemfiles/rubocop_0.81.gemfile
+++ /dev/null
@@ -1,7 +0,0 @@
-# This file was generated by Appraisal
-
-source "https://rubygems.org"
-
-gem "rubocop", "~> 0.81.0"
-
-gemspec path: "../"
diff --git a/rubocop-thread_safety.gemspec b/rubocop-thread_safety.gemspec
index 613da28..567e971 100644
--- a/rubocop-thread_safety.gemspec
+++ b/rubocop-thread_safety.gemspec
@@ -26,7 +26,7 @@ Gem::Specification.new do |spec|
   spec.executables   = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }
   spec.require_paths = ['lib']
 
-  spec.required_ruby_version = '>= 2.3.0'
+  spec.required_ruby_version = '>= 2.5.0'
 
   spec.add_runtime_dependency 'rubocop', '>= 0.53.0'