diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
new file mode 100644
index 0000000..ad05647
--- /dev/null
+++ b/.gitlab-ci.yml
@@ -0,0 +1,51 @@
+---
+stages:
+  - test
+  - coverage
+
+default:
+  before_script:
+    - apt-get update -qy
+    - apt-get install -y libtidy-dev
+    - ruby -v
+    - which ruby
+    - gem install bundler --no-document
+    - bundle install --jobs $(nproc)  "${FLAGS[@]}"
+
+.tests:
+  script:
+    - bundle exec rake
+  stage: test
+
+test:2.4:
+  extends: .tests
+  image: 'ruby:2.4'
+
+test:2.5:
+  extends: .tests
+  image: 'ruby:2.5'
+  script:
+    - bundle exec rake
+
+test:2.6:
+  extends: .tests
+  image: 'ruby:2.6'
+  script:
+    - bundle exec rake
+
+test:2.7:
+  extends: .tests
+  image: 'ruby:2.7'
+
+test:jruby:
+  extends: .tests
+  image: 'jruby:9.2.12-jre'
+
+coverage:
+  image: 'ruby:2.7'
+  script:
+    - bundle exec rake test
+  artifacts:
+    paths:
+      - coverage/
+  stage: coverage
diff --git a/.rubocop.yml b/.rubocop.yml
index 4a0ee8a..9c8e178 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -1,6 +1,6 @@
 ---
 AllCops:
-  TargetRubyVersion: 2.3
+  TargetRubyVersion: 2.4
 Naming/FileName:
   Enabled: false
 Lint/MissingCopEnableDirective:
diff --git a/.travis.yml b/.travis.yml
index 71d438c..1253384 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,11 +1,11 @@
 ---
-dist: xenial
+dist: bionic
 sudo: true
 language: ruby
 cache: bundler
 before_install:
   - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then wget https://github.com/htacg/tidy-html5/releases/download/5.4.0/tidy-5.4.0-64bit.deb; sudo apt-get remove '^libtidy.*';  sudo dpkg -i tidy-5.4.0-64bit.deb; fi
-  - gem install bundler -v '<2'
+  - gem install bundler --no-document
 rvm:
   - 2.3
   - 2.4
diff --git a/README.md b/README.md
index 878643e..e27ec53 100644
--- a/README.md
+++ b/README.md
@@ -148,9 +148,9 @@ The MIT License
 Copyright (c) 2009-2020 Laurent Arnoud <laurent@spkdev.net>
 
 ---
-[![Build](https://img.shields.io/travis/spk/validate-website.svg)](https://travis-ci.org/spk/validate-website)
+[![Build](https://img.shields.io/gitlab/pipeline/spkdev/validate-website/master)](https://gitlab.com/spkdev/validate-website/-/commits/master)
+[![Coverage](https://gitlab.com/spkdev/validate-website/badges/master/coverage.svg)](https://gitlab.com/spkdev/validate-website/-/commits/master)
 [![Version](https://img.shields.io/gem/v/validate-website.svg)](https://rubygems.org/gems/validate-website)
 [![Documentation](https://img.shields.io/badge/doc-rubydoc-blue.svg)](http://www.rubydoc.info/gems/validate-website)
 [![License](https://img.shields.io/badge/license-MIT-blue.svg)](http://opensource.org/licenses/MIT "MIT")
-[![Coverage Status](https://img.shields.io/coveralls/github/spk/validate-website.svg)](https://coveralls.io/github/spk/validate-website?branch=master)
 [![Inline docs](https://inch-ci.org/github/spk/validate-website.svg?branch=master)](http://inch-ci.org/github/spk/validate-website)
diff --git a/Rakefile b/Rakefile
index f67519c..393ee34 100644
--- a/Rakefile
+++ b/Rakefile
@@ -4,8 +4,7 @@ require 'rake/testtask'
 require 'rubocop/rake_task'
 require 'asciidoctor'
 
-default = %i[test]
-default << :rubocop unless RUBY_ENGINE == 'rbx'
+default = %i[test rubocop]
 task default: default
 
 desc 'Update manpage from asciidoc file'
diff --git a/validate-website.gemspec b/validate-website.gemspec
index afbbb33..4460e38 100644
--- a/validate-website.gemspec
+++ b/validate-website.gemspec
@@ -11,7 +11,7 @@ Gem::Specification.new do |s|
   s.name = 'validate-website'
   s.version = ValidateWebsite::VERSION
   s.license = 'MIT'
-  s.required_ruby_version = '>= 2.3.0'
+  s.required_ruby_version = '>= 2.4'
   s.add_dependency 'crass', '~> 1'
   s.add_dependency 'paint', '~> 2'
   s.add_dependency 'slop', '~> 4.6'
@@ -20,7 +20,6 @@ Gem::Specification.new do |s|
   s.add_dependency 'w3c_validators', '~> 1.3'
   s.add_development_dependency 'asciidoctor', '~> 1.5'
   s.add_development_dependency 'minitest', '~> 5.0'
-  s.add_development_dependency('racc') if RUBY_ENGINE == 'rbx'
   s.add_development_dependency 'rake', '~> 12'
   s.add_development_dependency 'rubocop', '~> 0.76.0'
   s.add_development_dependency 'webmock', '~> 3.4'