diff --git a/.kitchen.yml b/.kitchen.yml
index d5cf498..7d7fdc6 100644
--- a/.kitchen.yml
+++ b/.kitchen.yml
@@ -8,8 +8,6 @@ driver:
   provision_command:
     - curl -sSL https://get.docker.com/ | sh
 
-
-
 provisioner:
   name: shell
   data_path: .
@@ -26,15 +24,6 @@ platforms:
   - name: debian-8
 
 suites:
-  - name: ruby-20
-    driver:
-      image: ruby:2.0-slim
-  - name: ruby-21
-    driver:
-      image: ruby:2.1-slim
-  - name: ruby-22
-    driver:
-      image: ruby:2.2-slim
   - name: ruby-230
     driver:
       image: ruby:2.3.0-slim
diff --git a/.travis.yml b/.travis.yml
index b611ffd..008c160 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,27 +1,24 @@
 language: ruby
 cache:
-- bundler
+  - bundler
 before_install:
-  - gem update bundler
+  - gem install bundler -v 2.1
 install:
-- bundle install
+  - bundle install
 rvm:
-- 2.0
-- 2.1
-- 2.2
-- 2.3.0
-- 2.4.1
+  - 2.3.0
+  - 2.4.1
 notifications:
   email:
     recipients:
-    - sensu-plugin@sensu-plugins.io
+      - sensu-plugin@sensu-plugins.io
     on_success: change
     on_failure: always
 script:
-- bundle exec rake quick
-- bundle exec rake kitchen:ruby-`echo $TRAVIS_RUBY_VERSION | sed -e "s/\.//g"`-debian-8
-- gem build sensu-plugins-docker.gemspec
-- gem install sensu-plugins-docker-*.gem
+  - bundle exec rake quick
+  - bundle exec rake kitchen:ruby-`echo $TRAVIS_RUBY_VERSION | sed -e "s/\.//g"`-debian-8
+  - gem build sensu-plugins-docker.gemspec
+  - gem install sensu-plugins-docker-*.gem
 deploy:
   provider: rubygems
   api_key:
@@ -30,9 +27,5 @@ deploy:
   on:
     tags: true
     all_branches: true
-    rvm: 2.0
-    rvm: 2.1
-    rvm: 2.2
-    rvm: 2.3.0
     rvm: 2.4.1
     repo: sensu-plugins/sensu-plugins-docker
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8267db9..0d3d7b5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,7 +8,8 @@ Which is based on [Keep A Changelog](http://keepachangelog.com/)
 
 ## [4.0.0] - 2020-04-09
 ### Breaking Changes
-- bumped `sensu-plugin` dependency from `~> 2.0` to `~> 4.0` please consult the changelog for additional details. The notable breaking change [is](https://github.com/sensu-plugins/sensu-plugin/blob/master/CHANGELOG.md#v145---2017-03-07)
+- bumped `sensu-plugin` dependency from `~> 2.0` to `~> 4.0` please consult the changelog for additional details. The notable breaking change [is](https://github.com/sensu-plugins/sensu-plugin/blob/master/CHANGELOG.md#v145---2017-03-07) (@majormoses)
+- dopped support for ruby `< 2.3` (@majormoses)
 
 ## [3.2.0] - 2018-11-22
 ### Fixed
diff --git a/sensu-plugins-docker.gemspec b/sensu-plugins-docker.gemspec
index 1bec09b..9b6f308 100644
--- a/sensu-plugins-docker.gemspec
+++ b/sensu-plugins-docker.gemspec
@@ -25,7 +25,7 @@ Gem::Specification.new do |s|
   s.platform               = Gem::Platform::RUBY
   s.post_install_message   = 'You can use the embedded Ruby by setting EMBEDDED_RUBY=true in /etc/default/sensu'
   s.require_paths          = ['lib']
-  s.required_ruby_version  = '>= 2.0.0'
+  s.required_ruby_version  = '>= 2.3.0'
   s.summary                = 'Sensu plugins for docker'
   s.test_files             = s.files.grep(%r{^(test|spec|features)/})
   s.version                = SensuPluginsDocker::Version::VER_STRING
@@ -34,7 +34,7 @@ Gem::Specification.new do |s|
   s.add_runtime_dependency 'sys-proctable', '0.9.8'
   s.add_runtime_dependency 'net_http_unix', '0.2.2'
 
-  s.add_development_dependency 'bundler',                   '~> 1.7'
+  s.add_development_dependency 'bundler',                   '~> 2.1'
   s.add_development_dependency 'codeclimate-test-reporter', '~> 0.4'
   s.add_development_dependency 'github-markup',             '~> 1.3'
   s.add_development_dependency 'kitchen-docker',            '~> 2.6'
diff --git a/test/integration/ruby-21/serverspec/default_spec.rb b/test/integration/ruby-21/serverspec/default_spec.rb
deleted file mode 100644
index 989a033..0000000
--- a/test/integration/ruby-21/serverspec/default_spec.rb
+++ /dev/null
@@ -1,3 +0,0 @@
-# frozen_string_literal: true
-
-require 'spec_helper'
diff --git a/test/integration/ruby-22/serverspec/default_spec.rb b/test/integration/ruby-22/serverspec/default_spec.rb
deleted file mode 100644
index 989a033..0000000
--- a/test/integration/ruby-22/serverspec/default_spec.rb
+++ /dev/null
@@ -1,3 +0,0 @@
-# frozen_string_literal: true
-
-require 'spec_helper'