diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
new file mode 100644
index 0000000..33f4a5c
--- /dev/null
+++ b/.github/workflows/test.yml
@@ -0,0 +1,27 @@
+name: Test
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+  schedule:
+    - cron: '0 6 * * *'
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        ruby-version: ['2.6', '2.7', '3.0']
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Set up Ruby
+      uses: ruby/setup-ruby@v1
+      with:
+        ruby-version: ${{ matrix.ruby-version }}
+        bundler-cache: true # runs 'bundle install' and caches installed gems automatically
+    - name: Run tests
+      run: bundle exec rake
diff --git a/.rubocop.yml b/.rubocop.yml
index 31aeeb6..e836519 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -4,27 +4,33 @@ AllCops:
   - vendor/**/*
 Documentation:
   Enabled: false
-AlignParameters:
+Layout/ParameterAlignment:
   Enabled: true
-Encoding:
-  Enabled: false
 HashSyntax:
   Enabled: true
 LineLength:
   Enabled: false
 EmptyLinesAroundBlockBody:
   Enabled: false
+Style/Encoding:
+  Enabled: false
 MethodLength:
   Max: 40
 NumericLiterals:
   MinDigits: 10
+Metrics/BlockLength:
+  Max: 45 # needed for 6.1.1
 Metrics/CyclomaticComplexity:
   Max: 10
 Metrics/PerceivedComplexity:
   Max: 10
 Metrics/AbcSize:
-  Max: 29
-Metrics/BlockLength:
-  Max: 29
-AllCops:
-  TargetRubyVersion: 2.2
+  Max: 30
+# Lint/AmbiguousBlockAssociation is incompatible with RSpec
+# https://github.com/rubocop-hq/rubocop/issues/4222
+Lint/AmbiguousBlockAssociation:
+  Enabled: false
+Lint/AmbiguousRegexpLiteral:
+  Enabled: false
+Style/NumericPredicate:
+  Enabled: false
diff --git a/Gemfile b/Gemfile
index da0008c..a076fc4 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,12 +1,18 @@
-source 'https://rubygems.org'
+# frozen_string_literal: true
 
-gem 'highline', '~> 1.6.0'
+source 'https://rubygems.org'
 
-gem 'inspec', '~> 2'
-gem 'rack', '1.6.4'
+gem 'highline'
+gem 'rack'
 gem 'rake'
-gem 'rubocop', '~> 0.49.0'
+gem 'rubocop'
 
 group :tools do
-  gem 'github_changelog_generator', '~> 1.14.0'
+  gem 'github_changelog_generator'
+  gem 'pry-coolline'
+end
+
+source 'https://packagecloud.io/cinc-project/stable' do
+  gem 'chef-config'
+  gem 'cinc-auditor-bin'
 end
diff --git a/Rakefile b/Rakefile
index ebf65df..ed8b932 100755
--- a/Rakefile
+++ b/Rakefile
@@ -1,5 +1,4 @@
-#!/usr/bin/env rake
-# encoding: utf-8
+# frozen_string_literal: true
 
 require 'rake/testtask'
 require 'rubocop/rake_task'
@@ -20,23 +19,9 @@ task default: [:lint, 'test:check']
 namespace :test do
   # run inspec check to verify that the profile is properly configured
   task :check do
-    dir = File.join(File.dirname(__FILE__))
-    sh("bundle exec inspec check #{dir}")
+    require 'inspec'
+    puts "Checking profile with InSpec Version: #{Inspec::VERSION}"
+    profile = Inspec::Profile.for_target('.', backend: Inspec::Backend.create(Inspec::Config.mock))
+    pp profile.check
   end
 end
-
-# Automatically generate a changelog for this project. Only loaded if
-# the necessary gem is installed. By default its picking up the version from
-# inspec.yml. You can override that behavior with `rake changelog to=1.2.0`
-begin
-  require 'yaml'
-  metadata = YAML.load_file('inspec.yml')
-  v = ENV['to'] || metadata['version']
-  puts "Generate changelog for version #{v}"
-  require 'github_changelog_generator/task'
-  GitHubChangelogGenerator::RakeTask.new :changelog do |config|
-    config.future_release = v
-  end
-rescue LoadError
-  puts '>>>>> GitHub Changelog Generator not loaded, omitting tasks'
-end
diff --git a/Vagrantfile b/Vagrantfile
index 2b625a2..de9e2e9 100644
--- a/Vagrantfile
+++ b/Vagrantfile
@@ -1,4 +1,5 @@
 # encoding: utf-8
+# frozen_string_literal: true
 
 # -*- mode: ruby -*-
 # vi: set ft=ruby :
diff --git a/controls/container_images.rb b/controls/container_images.rb
index 229b436..8146ac4 100644
--- a/controls/container_images.rb
+++ b/controls/container_images.rb
@@ -23,7 +23,7 @@
 title 'Container Images and Build File'
 
 # attributes
-CONTAINER_USER = attribute('container_user')
+CONTAINER_USER = input('container_user')
 
 # check if docker exists
 only_if('docker not found') do
diff --git a/controls/container_runtime.rb b/controls/container_runtime.rb
index 2a63bb9..ae27dc2 100644
--- a/controls/container_runtime.rb
+++ b/controls/container_runtime.rb
@@ -23,9 +23,9 @@
 title 'Container Runtime'
 
 # attributes
-CONTAINER_CAPADD = attribute('container_capadd')
-APP_ARMOR_PROFILE = attribute('app_armor_profile')
-SELINUX_PROFILE = attribute('selinux_profile')
+CONTAINER_CAPADD = input('container_capadd')
+APP_ARMOR_PROFILE = input('app_armor_profile')
+SELINUX_PROFILE = input('selinux_profile')
 
 # check if docker exists
 only_if('docker not found') do
@@ -153,13 +153,13 @@
     info['Mounts'].each do |mounts|
       describe mounts['Source'] do
         it { should_not eq '/' }
-        it { should_not match(%r{\/boot}) }
-        it { should_not match(%r{\/dev}) }
-        it { should_not match(%r{\/etc}) }
-        it { should_not match(%r{\/lib}) }
-        it { should_not match(%r{\/proc}) }
-        it { should_not match(%r{\/sys}) }
-        it { should_not match(%r{\/usr}) }
+        it { should_not match(%r{/boot}) }
+        it { should_not match(%r{/dev}) }
+        it { should_not match(%r{/etc}) }
+        it { should_not match(%r{/lib}) }
+        it { should_not match(%r{/proc}) }
+        it { should_not match(%r{/sys}) }
+        it { should_not match(%r{/usr}) }
       end
     end
   end
@@ -185,7 +185,7 @@
   ref 'Why you don\'t need to run SSHd in your Docker containers', url: 'https://blog.docker.com/2014/06/why-you-dont-need-to-run-sshd-in-docker/'
 
   docker.containers.running?.ids.each do |id|
-    execute_command = 'docker exec ' + id + ' ps -e'
+    execute_command = "docker exec #{id} ps -e"
     describe command(execute_command) do
       its('stdout') { should_not match(/ssh/) }
     end
@@ -209,8 +209,10 @@
   docker.containers.running?.ids.each do |id|
     container_info = docker.object(id)
     next if container_info['NetworkSettings']['Ports'].nil?
+
     container_info['NetworkSettings']['Ports'].each do |_, hosts|
       next if hosts.nil?
+
       hosts.each do |host|
         describe host['HostPort'].to_i.between?(1, 1024) do
           it { should eq false }
@@ -341,8 +343,10 @@
   docker.containers.running?.ids.each do |id|
     container_info = docker.object(id)
     next if container_info['NetworkSettings']['Ports'].nil?
+
     container_info['NetworkSettings']['Ports'].each do |_, hosts|
       next if hosts.nil?
+
       hosts.each do |host|
         describe host['HostIp'].to_i.between?(1, 1024) do
           it { should_not eq '0.0.0.0' }
diff --git a/controls/docker_daemon_configuration.rb b/controls/docker_daemon_configuration.rb
index 73ecba4..8a69ace 100644
--- a/controls/docker_daemon_configuration.rb
+++ b/controls/docker_daemon_configuration.rb
@@ -23,16 +23,16 @@
 title 'Docker Daemon Configuration'
 
 # attributes
-DAEMON_TLSCACERT = attribute('daemon_tlscacert')
-DAEMON_TLSCERT = attribute('daemon_tlscert')
-DAEMON_TLSKEY = attribute('daemon_tlskey')
-AUTHORIZATION_PLUGIN = attribute('authorization_plugin')
-LOG_DRIVER = attribute('log_driver')
-LOG_OPTS = attribute('log_opts')
-SWARM_MODE = attribute('swarm_mode')
-SWARM_MAX_MANAGER_NODES = attribute('swarm_max_manager_nodes')
-SWARM_PORT = attribute('swarm_port')
-SECCOMP_DEFAULT_PROFILE = attribute('seccomp_default_profile')
+DAEMON_TLSCACERT = input('daemon_tlscacert')
+DAEMON_TLSCERT = input('daemon_tlscert')
+DAEMON_TLSKEY = input('daemon_tlskey')
+AUTHORIZATION_PLUGIN = input('authorization_plugin')
+LOG_DRIVER = input('log_driver')
+LOG_OPTS = input('log_opts')
+SWARM_MODE = input('swarm_mode')
+SWARM_MAX_MANAGER_NODES = input('swarm_max_manager_nodes')
+SWARM_PORT = input('swarm_port')
+SECCOMP_DEFAULT_PROFILE = input('seccomp_default_profile')
 
 # check if docker exists
 only_if('docker not found') do
@@ -168,8 +168,8 @@
   ref 'Docker daemon deafult ulimits', url: 'https://docs.docker.com/engine/reference/commandline/daemon/#default-ulimits'
 
   describe json('/etc/docker/daemon.json') do
-    its(['default-ulimits', 'nproc']) { should eq('1024:2408') }
-    its(['default-ulimits', 'nofile']) { should eq('100': '200') }
+    its(%w[default-ulimits nproc]) { should eq('1024:2408') }
+    its(%w[default-ulimits nofile]) { should eq('100': '200') }
   end
 end
 
diff --git a/controls/docker_daemon_configuration_files.rb b/controls/docker_daemon_configuration_files.rb
index 8f6817f..dfad4d0 100644
--- a/controls/docker_daemon_configuration_files.rb
+++ b/controls/docker_daemon_configuration_files.rb
@@ -23,9 +23,9 @@
 title 'Docker Daemon Configuration Files'
 
 # attributes
-REGISTRY_CERT_PATH = attribute('registry_cert_path')
-REGISTRY_NAME = attribute('registry_name')
-REGISTRY_CA_FILE = attribute('registry_ca_file')
+REGISTRY_CERT_PATH = input('registry_cert_path')
+REGISTRY_NAME = input('registry_name')
+REGISTRY_CA_FILE = input('registry_ca_file')
 
 # check if docker exists
 only_if('docker not found') do
diff --git a/controls/host_configuration.rb b/controls/host_configuration.rb
index 8c4b168..47e8c0b 100644
--- a/controls/host_configuration.rb
+++ b/controls/host_configuration.rb
@@ -22,9 +22,9 @@
 
 title 'Host Configuration'
 
-TRUSTED_USER = attribute('trusted_user')
-MANAGEABLE_CONTAINER_NUMBER = attribute('managable_container_number')
-BENCHMARK_VERSION = attribute('benchmark_version')
+TRUSTED_USER = input('trusted_user')
+MANAGEABLE_CONTAINER_NUMBER = input('managable_container_number')
+BENCHMARK_VERSION = input('benchmark_version')
 
 # check if docker exists
 only_if('docker not found') do
@@ -233,7 +233,7 @@
 
   only_if { os.linux? }
   if docker_helper.path
-    rule = '-w ' + docker_helper.path + ' -p rwxa -k docker'
+    rule = "-w #{docker_helper.path} -p rwxa -k docker"
     describe auditd do
       its(:lines) { should include(rule) }
     end
@@ -259,7 +259,7 @@
 
   only_if { os.linux? }
   if docker_helper.socket
-    rule = '-w ' + docker_helper.socket + ' -p rwxa -k docker'
+    rule = "-w #{docker_helper.socket} -p rwxa -k docker"
     describe auditd do
       its(:lines) { should include(rule) }
     end
diff --git a/inspec.yml b/inspec.yml
index 7e14ad1..02b7965 100644
--- a/inspec.yml
+++ b/inspec.yml
@@ -7,7 +7,7 @@ copyright_email: hello@dev-sec.io
 license: Apache-2.0
 summary: An InSpec Compliance Profile for the CIS Docker Benchmark
 version: 2.1.3
-inspec_version: '>= 2.3.23'
+inspec_version: '>= 4.6.3'
 attributes:
     - name: container_user
       required: false
diff --git a/libraries/docker_helper.rb b/libraries/docker_helper.rb
index 6a30676..169e592 100644
--- a/libraries/docker_helper.rb
+++ b/libraries/docker_helper.rb
@@ -1,4 +1,5 @@
 # encoding: utf-8
+# frozen_string_literal: true
 
 # Copyright 2016, Christoph Hartmann
 #