diff --git a/.devcontainer/devcontainer.json b/.devcontainer/devcontainer.json
index f1a55dc3f0acb1031982196149da8edcb1a2d6ef..fe7a8b12b998dab13c95cce183eec95e387ae6bc 100644
--- a/.devcontainer/devcontainer.json
+++ b/.devcontainer/devcontainer.json
@@ -1,23 +1,17 @@
-// For format details, see https://aka.ms/devcontainer.json. For config options, see the README at:
-// https://github.com/microsoft/vscode-dev-containers/tree/v0.140.1/containers/puppet
 {
 	"name": "Puppet Development Kit (Community)",
 	"dockerFile": "Dockerfile",
 
-	// Set *default* container specific settings.json values on container create.
 	"settings": {
-		"terminal.integrated.shell.linux": "/bin/bash"
+		"terminal.integrated.profiles.linux": {
+			"bash": {
+				"path": "bash",
+			}
+		}
 	},
 
-	// Add the IDs of extensions you want installed when the container is created.
 	"extensions": [
 		"puppet.puppet-vscode",
 		"rebornix.Ruby"
 	]
-
-	// Use 'forwardPorts' to make a list of ports inside the container available locally.
-	// "forwardPorts": [],
-
-	// Use 'postCreateCommand' to run commands after the container is created.
-	// "postCreateCommand": "pdk --version",
 }
diff --git a/.rubocop.yml b/.rubocop.yml
index 8f782e741528905cd59743f73283f8a39e9bf210..31e8248ff813e956702d5c67844aeb0e2affc917 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -4,7 +4,7 @@ require:
 - rubocop-rspec
 AllCops:
   DisplayCopNames: true
-  TargetRubyVersion: '2.4'
+  TargetRubyVersion: '2.5'
   Include:
   - "**/*.rb"
   Exclude:
diff --git a/Gemfile b/Gemfile
index 18272fd72e8b95feb3fe64e34a51a9b75a7af794..0057a1722c6e185755de3802eef2da5c724db7c7 100644
--- a/Gemfile
+++ b/Gemfile
@@ -13,28 +13,39 @@ def location_for(place_or_version, fake_version = nil)
   end
 end
 
-ruby_version_segments = Gem::Version.new(RUBY_VERSION.dup).segments
-minor_version = ruby_version_segments[0..1].join('.')
-
 group :development do
-  gem "json", '= 2.0.4',                                         require: false if Gem::Requirement.create('~> 2.4.2').satisfied_by?(Gem::Version.new(RUBY_VERSION.dup))
-  gem "json", '= 2.1.0',                                         require: false if Gem::Requirement.create(['>= 2.5.0', '< 2.7.0']).satisfied_by?(Gem::Version.new(RUBY_VERSION.dup))
-  gem "json", '= 2.3.0',                                         require: false if Gem::Requirement.create(['>= 2.7.0', '< 2.8.0']).satisfied_by?(Gem::Version.new(RUBY_VERSION.dup))
-  gem "puppet-module-posix-default-r#{minor_version}", '~> 1.0', require: false, platforms: [:ruby]
-  gem "puppet-module-posix-dev-r#{minor_version}", '~> 1.0',     require: false, platforms: [:ruby]
-  gem "puppet-module-win-default-r#{minor_version}", '~> 1.0',   require: false, platforms: [:mswin, :mingw, :x64_mingw]
-  gem "puppet-module-win-dev-r#{minor_version}", '~> 1.0',       require: false, platforms: [:mswin, :mingw, :x64_mingw]
-  gem "puppet-lint-absolute_classname-check", '3.0.1',           require: false
-  gem "puppet-lint-absolute_template_path", '1.0.1',             require: false
-  gem "puppet-lint-empty_trailing_lines", '0.0.1',               require: false
-  gem "puppet-lint-file_ensure-check", '1.0.0',                  require: false
-  gem "puppet-lint-strict_indent-check", '2.0.8',                require: false
-  gem "puppet-lint-trailing_comma-check", '0.4.2',               require: false
-  gem "puppet-lint-unquoted_string-check", '2.1.0',              require: false
+  gem "json", '= 2.1.0',                                  require: false if Gem::Requirement.create(['>= 2.5.0', '< 2.7.0']).satisfied_by?(Gem::Version.new(RUBY_VERSION.dup))
+  gem "json", '= 2.3.0',                                  require: false if Gem::Requirement.create(['>= 2.7.0', '< 3.0.0']).satisfied_by?(Gem::Version.new(RUBY_VERSION.dup))
+  gem "json", '= 2.5.1',                                  require: false if Gem::Requirement.create(['>= 3.0.0', '< 3.0.5']).satisfied_by?(Gem::Version.new(RUBY_VERSION.dup))
+  gem "json", '= 2.6.1',                                  require: false if Gem::Requirement.create(['>= 3.1.0', '< 3.1.3']).satisfied_by?(Gem::Version.new(RUBY_VERSION.dup))
+  gem "json", '= 2.6.3',                                  require: false if Gem::Requirement.create(['>= 3.2.0', '< 4.0.0']).satisfied_by?(Gem::Version.new(RUBY_VERSION.dup))
+  gem "voxpupuli-puppet-lint-plugins", '~> 3.1',          require: false
+  gem "facterdb", '~> 1.18',                              require: false
+  gem "metadata-json-lint", '>= 2.0.2', '< 4.0.0',        require: false
+  gem "puppetlabs_spec_helper", '>= 3.0.0', '< 5.0.0',    require: false
+  gem "rspec-puppet-facts", '~> 2.0',                     require: false
+  gem "codecov", '~> 0.2',                                require: false
+  gem "dependency_checker", '~> 0.2',                     require: false
+  gem "parallel_tests", '~> 3.4',                         require: false
+  gem "pry", '~> 0.10',                                   require: false
+  gem "simplecov-console", '~> 0.5',                      require: false
+  gem "puppet-debugger", '~> 1.0',                        require: false
+  gem "rubocop", '= 1.6.1',                               require: false
+  gem "rubocop-performance", '= 1.9.1',                   require: false
+  gem "rubocop-rspec", '= 2.0.1',                         require: false
+  gem "rb-readline", '= 0.5.5',                           require: false, platforms: [:mswin, :mingw, :x64_mingw]
+  gem "concurrent-ruby", '< 1.2.0',                       require: false
+  gem "puppet-lint-absolute_classname-check", '>= 3.0.1', require: false
+  gem "puppet-lint-absolute_template_path", '>= 1.0.1',   require: false
+  gem "puppet-lint-empty_trailing_lines", '>= 0.0.1',     require: false
+  gem "puppet-lint-file_ensure-check", '>= 1.0.0',        require: false
+  gem "puppet-lint-strict_indent-check", '>= 2.0.8',      require: false
+  gem "puppet-lint-trailing_comma-check", '>= 0.4.3',     require: false
+  gem "puppet-lint-unquoted_string-check", '>= 2.1.0',    require: false
 end
 group :system_tests do
-  gem "puppet-module-posix-system-r#{minor_version}", '~> 1.0', require: false, platforms: [:ruby]
-  gem "puppet-module-win-system-r#{minor_version}", '~> 1.0',   require: false, platforms: [:mswin, :mingw, :x64_mingw]
+  gem "puppet_litmus", '< 1.0.0', require: false, platforms: [:ruby]
+  gem "serverspec", '~> 2.41',    require: false
 end
 
 puppet_version = ENV['PUPPET_GEM_VERSION']
diff --git a/Rakefile b/Rakefile
index 2906c15babbebe65d3ed29e72a07328609fefe8e..0f8754eb61e400db1d117cad5026f06d3ba6ff89 100644
--- a/Rakefile
+++ b/Rakefile
@@ -43,6 +43,7 @@ end
 
 PuppetLint.configuration.send('disable_relative')
 
+
 if Bundler.rubygems.find_name('github_changelog_generator').any?
   GitHubChangelogGenerator::RakeTask.new :changelog do |config|
     raise "Set CHANGELOG_GITHUB_TOKEN environment variable eg 'export CHANGELOG_GITHUB_TOKEN=valid_token_here'" if Rake.application.top_level_tasks.include? "changelog" and ENV['CHANGELOG_GITHUB_TOKEN'].nil?
diff --git a/metadata.json b/metadata.json
index b01ff50fc8501ea71fe6d677d6c5835fde581329..cb6c9a3c1d574c6a1eeb1ddde49db09cf9923184 100644
--- a/metadata.json
+++ b/metadata.json
@@ -26,7 +26,7 @@
       "version_requirement": ">= 6.21.0 < 8.0.0"
     }
   ],
-  "pdk-version": "2.2.0",
+  "pdk-version": "2.6.1",
   "template-url": "https://gitlab.it.liu.se/puppet-infra/pdk-templates.git#liu",
-  "template-ref": "heads/liu-0-gd8925d4"
+  "template-ref": "heads/liu-0-g09dd5f0"
 }