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..f47939c 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
+appraise 'rubocop-1.20' do
     gem 'rubocop', '~> 1.20.0'
-  end
 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: "../"