diff --git a/.rubocop.yml b/.rubocop.yml
index a1bb0e2..fa3e44c 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -1,3 +1,5 @@
+inherit_from: .rubocop_todo.yml
+
 AlignParameters:
   Enabled: false
 
diff --git a/.rubocop_todo.yml b/.rubocop_todo.yml
new file mode 100644
index 0000000..5f1c437
--- /dev/null
+++ b/.rubocop_todo.yml
@@ -0,0 +1,17 @@
+# This configuration was generated by
+# `rubocop --auto-gen-config`
+# on 2018-04-20 15:39:52 -0500 using RuboCop version 0.49.1.
+# The point is for the user to remove these configuration records
+# one by one as the offenses are removed from the code base.
+# Note that changes in the inspected code, or installation of new
+# versions of RuboCop, may require this file to be generated again.
+
+# Offense count: 7
+# Configuration parameters: CountComments, ExcludedMethods.
+Metrics/BlockLength:
+  Max: 51
+
+# Offense count: 1
+Security/MarshalLoad:
+  Exclude:
+    - 'libraries/cache_data.rb'
diff --git a/Berksfile b/Berksfile
index ca6b553..1a921f7 100644
--- a/Berksfile
+++ b/Berksfile
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 source 'https://supermarket.chef.io'
 
 metadata
diff --git a/Gemfile b/Gemfile
index 9cb48d3..e9dc0a1 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,10 +1,12 @@
+# frozen_string_literal: true
+
 source 'https://rubygems.org'
 
 group :integration do
   # Workaround: berkshell is dependent on buff-extensions gem but install older version as the new one (2.0.0) requires
   # ruby 2.2 and chefdk up to 0.17 provides ruby 2.1.8
-  gem 'buff-extensions', '~>1.0.0'
   gem 'berkshelf'
+  gem 'buff-extensions', '~>1.0.0'
   gem 'kitchen-docker', '>=2.3.0'
   gem 'kitchen-vagrant', '>=0.18.0'
   gem 'test-kitchen', '>=1.4.2'
diff --git a/attributes/agents_package.rb b/attributes/agents_package.rb
index 00d5f56..b29fd35 100644
--- a/attributes/agents_package.rb
+++ b/attributes/agents_package.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 #
 # Cookbook Name:: dynatrace
 # Attributes:: agents_package
diff --git a/attributes/apache_wsagent.rb b/attributes/apache_wsagent.rb
index 4699618..b621930 100644
--- a/attributes/apache_wsagent.rb
+++ b/attributes/apache_wsagent.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 #
 # Cookbook Name:: dynatrace
 # Attributes:: apache_wsagent
diff --git a/attributes/collector.rb b/attributes/collector.rb
index a6fcdd2..7ae2279 100644
--- a/attributes/collector.rb
+++ b/attributes/collector.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 #
 # Cookbook Name:: dynatrace
 # Attributes:: collector
diff --git a/attributes/copy_or_download_file.rb b/attributes/copy_or_download_file.rb
index 94ec618..6854fbf 100644
--- a/attributes/copy_or_download_file.rb
+++ b/attributes/copy_or_download_file.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 #
 # Cookbook Name:: dynatrace
 # Attributes:: copy_or_download_file
diff --git a/attributes/default.rb b/attributes/default.rb
index 530c744..0a00f33 100644
--- a/attributes/default.rb
+++ b/attributes/default.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 #
 # Cookbook Name:: dynatrace
 # Attributes:: default
diff --git a/attributes/dotnet_agent.rb b/attributes/dotnet_agent.rb
index 22ad26d..0e25067 100644
--- a/attributes/dotnet_agent.rb
+++ b/attributes/dotnet_agent.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 #
 # Cookbook Name:: dynatrace
 # Attributes:: dotnet_agent
diff --git a/attributes/host_agent.rb b/attributes/host_agent.rb
index 597e93d..aed6b70 100644
--- a/attributes/host_agent.rb
+++ b/attributes/host_agent.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 #
 # Cookbook Name:: dynatrace
 # Attributes:: host_agent
diff --git a/attributes/iis_wsagent.rb b/attributes/iis_wsagent.rb
index 700aff0..b94fc76 100644
--- a/attributes/iis_wsagent.rb
+++ b/attributes/iis_wsagent.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 #
 # Cookbook Name:: dynatrace
 # Attributes:: iis_wsagent
diff --git a/attributes/java.rb b/attributes/java.rb
index 218fb42..b00f269 100644
--- a/attributes/java.rb
+++ b/attributes/java.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 #
 # Cookbook Name:: dynatrace
 # Attributes:: java
diff --git a/attributes/java_agent.rb b/attributes/java_agent.rb
index cfbf121..3ede243 100644
--- a/attributes/java_agent.rb
+++ b/attributes/java_agent.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 #
 # Cookbook Name:: dynatrace
 # Attributes:: java_agent
diff --git a/attributes/memory_analysis_server.rb b/attributes/memory_analysis_server.rb
index 931a111..8b16a42 100644
--- a/attributes/memory_analysis_server.rb
+++ b/attributes/memory_analysis_server.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 #
 # Cookbook Name:: dynatrace
 # Attributes:: memory_analysis_server
diff --git a/attributes/one_agent.rb b/attributes/one_agent.rb
index 726e374..d4e304d 100644
--- a/attributes/one_agent.rb
+++ b/attributes/one_agent.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # The Dynatrace One Agent package will be installed into the directory
 # node['dynatrace']['agents_package']['linux']['installer']['prefix_dir']/dynatrace-$major-$minor-$rev,
 # where $major, $minor and $rev are given by the installer. A symbolic link to the actual installation directory will
diff --git a/attributes/server.rb b/attributes/server.rb
index 4025b13..1789afa 100644
--- a/attributes/server.rb
+++ b/attributes/server.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 #
 # Cookbook Name:: dynatrace
 # Attributes:: server
@@ -50,7 +52,7 @@
 default['dynatrace']['server']['pwh_connection']['password'] = 'dynatrace'
 
 # Accepted HTTP return codes when setting PWH connection. Used mainly for integration tests
-default['dynatrace']['server']['pwh_connection']['success_codes'] = %w(200)
+default['dynatrace']['server']['pwh_connection']['success_codes'] = %w[200]
 
 # Set a longer boot timeout due to the time to open the collector port
 # (see log "[SelfMonitoringLauncher] Waiting for self-monitoring Collector startup (max: 90 seconds)")
diff --git a/attributes/server_update.rb b/attributes/server_update.rb
index fc598c5..d953ff9 100644
--- a/attributes/server_update.rb
+++ b/attributes/server_update.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 #
 # Cookbook Name:: dynatrace
 # Attributes:: server_update
diff --git a/attributes/upgrade_system.rb b/attributes/upgrade_system.rb
index 8da42cb..3ac1161 100644
--- a/attributes/upgrade_system.rb
+++ b/attributes/upgrade_system.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 #
 # Cookbook Name:: upgrade_system
 # Attributes:: upgrade system
diff --git a/attributes/wsagent_package.rb b/attributes/wsagent_package.rb
index 3e500e6..cecc701 100644
--- a/attributes/wsagent_package.rb
+++ b/attributes/wsagent_package.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 #
 # Cookbook Name:: dynatrace
 # Attributes:: wsagent_package
diff --git a/libraries/cache_data.rb b/libraries/cache_data.rb
index 87d6bd7..27b79e9 100644
--- a/libraries/cache_data.rb
+++ b/libraries/cache_data.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 #
 # Cookbook Name:: dynatrace
 # Libraries:: cache_data
diff --git a/libraries/endpoint_helpers.rb b/libraries/endpoint_helpers.rb
index fba0fad..6785460 100644
--- a/libraries/endpoint_helpers.rb
+++ b/libraries/endpoint_helpers.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 #
 # Cookbook Name:: dynatrace
 # Libraries:: endpoint_helpers
@@ -19,9 +21,9 @@ class DynatraceTimeout < Timeout::Error; end
     # Exception used to inform that a connection endpoint (listening port, REST WS) is still not available
     class DynatraceNotReady < StandardError
       def initialize(endpoint, timeout)
-        super <<-EOH
-The Dynatrace Server at `#{endpoint}' did not become ready within #{timeout} seconds.
-Possibly, Dynatrace has failed to start. Please check your Dynatrace Server log files.
+        super <<~EOH
+          The Dynatrace Server at `#{endpoint}' did not become ready within #{timeout} seconds.
+          Possibly, Dynatrace has failed to start. Please check your Dynatrace Server log files.
 EOH
       end
     end
@@ -90,7 +92,7 @@ def self.wait_until_rest_endpoint_is_ready!(endpoint, timeout = 180)
 
     def self.rest_get(endpoint, user, pass, options = {})
       options[:accept] = options.fetch(:accept, 'application/json')
-      options[:success_codes] = options.fetch(:success_codes, %w(200))
+      options[:success_codes] = options.fetch(:success_codes, %w[200])
 
       uri = URI(endpoint)
       http = Net::HTTP.new(uri.host, uri.port)
@@ -106,7 +108,7 @@ def self.rest_get(endpoint, user, pass, options = {})
 
     def self.rest_put(endpoint, user, pass, body, options = {})
       options[:accept] = options.fetch(:accept, 'application/json')
-      options[:success_codes] = options.fetch(:success_codes, %w(200))
+      options[:success_codes] = options.fetch(:success_codes, %w[200])
 
       uri = URI(endpoint)
       http = Net::HTTP.new(uri.host, uri.port)
diff --git a/libraries/file_helpers.rb b/libraries/file_helpers.rb
index 79079cc..5630f39 100644
--- a/libraries/file_helpers.rb
+++ b/libraries/file_helpers.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 #
 # Cookbook Name:: dynatrace
 # Libraries:: file_helpers
diff --git a/libraries/package_helpers.rb b/libraries/package_helpers.rb
index 5f3da98..a73feca 100644
--- a/libraries/package_helpers.rb
+++ b/libraries/package_helpers.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 #
 # Cookbook Name:: dynatrace
 # Libraries:: package_helpers
diff --git a/libraries/process_helpers.rb b/libraries/process_helpers.rb
index 97eaf2f..da67a1c 100644
--- a/libraries/process_helpers.rb
+++ b/libraries/process_helpers.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 #
 # Cookbook Name:: dynatrace
 # Libraries:: process_helpers
@@ -53,7 +55,7 @@ def self.stop_processes(proc_pattern, proc_user, platform_family, timeout = 15,
     # private_class_method
     def self.find_pids(pattern, user, platform_family)
       pids = []
-      raise 'ERROR: Unsupported platform' unless %w(debian fedora rhel).include? platform_family
+      raise 'ERROR: Unsupported platform' unless %w[debian fedora rhel].include? platform_family
 
       pgrep_pattern_opt = !pattern.nil? ? "-f \"#{pattern}\"" : ''
       pgrep_user_opt = !user.nil? ? "-u #{user}" : ''
diff --git a/libraries/s3_helpers.rb b/libraries/s3_helpers.rb
index 084c25d..761c014 100644
--- a/libraries/s3_helpers.rb
+++ b/libraries/s3_helpers.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 #
 # Cookbook Name:: dynatrace
 # Libraries:: s3_helpers
diff --git a/metadata.rb b/metadata.rb
index 9b85bef..36dac0a 100644
--- a/metadata.rb
+++ b/metadata.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 name 'dynatrace-appmon'
 maintainer 'Martin Etmajer'
 maintainer_email 'martin.etmajer@dynatrace.com'
@@ -9,7 +11,7 @@
 issues_url 'https://github.com/Dynatrace/Dynatrace-AppMon-Chef/issues'
 chef_version '>= 12.1'
 
-%w( debian ubuntu redhat centos fedora amazon windows ).each do |os|
+%w[debian ubuntu redhat centos fedora amazon windows].each do |os|
   supports os
 end
 
diff --git a/providers/configure_ini_files.rb b/providers/configure_ini_files.rb
index 20ccdcf..70ff822 100644
--- a/providers/configure_ini_files.rb
+++ b/providers/configure_ini_files.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 #
 # Cookbook Name:: dynatrace
 # Providers:: configure_ini_files
diff --git a/providers/configure_init_scripts.rb b/providers/configure_init_scripts.rb
index f75d03f..b2cfbcd 100644
--- a/providers/configure_init_scripts.rb
+++ b/providers/configure_init_scripts.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 #
 # Cookbook Name:: dynatrace
 # Providers:: configure_init_scripts
diff --git a/providers/copy_or_download_file.rb b/providers/copy_or_download_file.rb
index 5fc7cea..06a84a3 100644
--- a/providers/copy_or_download_file.rb
+++ b/providers/copy_or_download_file.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 #
 # Cookbook Name:: dynatrace
 # Providers:: copy_or_download_file
diff --git a/providers/delete_directory_by_link.rb b/providers/delete_directory_by_link.rb
index 6df2b65..84dd2f5 100644
--- a/providers/delete_directory_by_link.rb
+++ b/providers/delete_directory_by_link.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 #
 # Cookbook Name:: dynatrace
 # Providers:: delete_directory_by_link
diff --git a/providers/run_jar_installer.rb b/providers/run_jar_installer.rb
index 12b267b..d73292d 100644
--- a/providers/run_jar_installer.rb
+++ b/providers/run_jar_installer.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 #
 # Cookbook Name:: dynatrace
 # Providers:: run_jar_installer
diff --git a/providers/run_tar_installer.rb b/providers/run_tar_installer.rb
index 23160d1..060f431 100644
--- a/providers/run_tar_installer.rb
+++ b/providers/run_tar_installer.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 #
 # Cookbook Name:: dynatrace
 # Providers:: run_tar_installer
diff --git a/recipes/agents_package.rb b/recipes/agents_package.rb
index 28629f0..3779e7c 100644
--- a/recipes/agents_package.rb
+++ b/recipes/agents_package.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 #
 # Cookbook Name:: dynatrace
 # Recipes:: agents_package
diff --git a/recipes/agents_package_uninstall.rb b/recipes/agents_package_uninstall.rb
index d41352a..c84c4d7 100644
--- a/recipes/agents_package_uninstall.rb
+++ b/recipes/agents_package_uninstall.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 #
 # Cookbook Name:: dynatrace
 # Recipes:: agents_package_uninstall
diff --git a/recipes/apache_wsagent.rb b/recipes/apache_wsagent.rb
index 3a788bb..e0cfb2f 100644
--- a/recipes/apache_wsagent.rb
+++ b/recipes/apache_wsagent.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 #
 # Cookbook Name:: dynatrace
 # Recipes:: apache_wsagent
diff --git a/recipes/apache_wsagent_uninstall.rb b/recipes/apache_wsagent_uninstall.rb
index 328094c..40564ee 100644
--- a/recipes/apache_wsagent_uninstall.rb
+++ b/recipes/apache_wsagent_uninstall.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 #
 # Cookbook Name:: dynatrace
 # Recipes:: apache_wsagent_uninstall
diff --git a/recipes/collector.rb b/recipes/collector.rb
index 74cab1f..f702074 100644
--- a/recipes/collector.rb
+++ b/recipes/collector.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 #
 # Cookbook Name:: dynatrace
 # Recipes:: collector
@@ -103,7 +105,7 @@
   service_name service
   # For Debian and Ubuntu distros - to correctly stop our service we need the status support which is disabled by default
   supports     :status => true
-  action       [:start, :enable]
+  action       %i[start enable]
 end
 
 ruby_block "Waiting for port #{agent_port} to become available" do
diff --git a/recipes/collector_uninstall.rb b/recipes/collector_uninstall.rb
index 560233f..85a9414 100644
--- a/recipes/collector_uninstall.rb
+++ b/recipes/collector_uninstall.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 #
 # Cookbook Name:: dynatrace
 # Recipes:: collector_uninstall
diff --git a/recipes/default.rb b/recipes/default.rb
index ac5bf2e..bc7e4e9 100644
--- a/recipes/default.rb
+++ b/recipes/default.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 #
 # Cookbook Name:: dynatrace
 # Recipes:: default
diff --git a/recipes/dotnet_agent.rb b/recipes/dotnet_agent.rb
index db0e7e0..9801ff1 100644
--- a/recipes/dotnet_agent.rb
+++ b/recipes/dotnet_agent.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 #
 # Cookbook Name:: dynatrace
 # Recipes:: dotnet_agent
diff --git a/recipes/dynatrace_user.rb b/recipes/dynatrace_user.rb
index 59a5429..c76de69 100644
--- a/recipes/dynatrace_user.rb
+++ b/recipes/dynatrace_user.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 #
 # Cookbook Name:: dynatrace
 # Recipes:: dynatrace_user
diff --git a/recipes/dynatrace_user_uninstall.rb b/recipes/dynatrace_user_uninstall.rb
index 9736c0a..356510d 100644
--- a/recipes/dynatrace_user_uninstall.rb
+++ b/recipes/dynatrace_user_uninstall.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 #
 # Cookbook Name:: dynatrace
 # Recipes:: dynatrace_user_uninstall
diff --git a/recipes/host_agent.rb b/recipes/host_agent.rb
index bfe977f..64c7d14 100644
--- a/recipes/host_agent.rb
+++ b/recipes/host_agent.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 #
 # Cookbook Name:: dynatrace
 # Recipes:: host_agent
@@ -115,5 +117,5 @@
   service_name service_name
   # For Debian and Ubuntu distros - to correctly stop our service we need the status support which is disabled by default
   supports     :status => true
-  action [:enable, :start]
+  action %i[enable start]
 end
diff --git a/recipes/host_agent_uninstall.rb b/recipes/host_agent_uninstall.rb
index e232e23..db44fdb 100644
--- a/recipes/host_agent_uninstall.rb
+++ b/recipes/host_agent_uninstall.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 #
 # Cookbook Name:: dynatrace
 # Recipes:: host_agent_uninstall
diff --git a/recipes/iis_wsagent.rb b/recipes/iis_wsagent.rb
index 7512390..d8be630 100644
--- a/recipes/iis_wsagent.rb
+++ b/recipes/iis_wsagent.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 #
 # Cookbook Name:: dynatrace
 # Recipes:: iis_wsagent
diff --git a/recipes/java.rb b/recipes/java.rb
index 3e0d742..cb5aaf0 100644
--- a/recipes/java.rb
+++ b/recipes/java.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 #
 # Cookbook Name:: dynatrace
 # Recipes:: java
diff --git a/recipes/java_agent.rb b/recipes/java_agent.rb
index 8a73234..358a822 100644
--- a/recipes/java_agent.rb
+++ b/recipes/java_agent.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 #
 # Cookbook Name:: dynatrace
 # Recipes:: java_agent
diff --git a/recipes/memory_analysis_server.rb b/recipes/memory_analysis_server.rb
index 6fb68e8..796f8b4 100644
--- a/recipes/memory_analysis_server.rb
+++ b/recipes/memory_analysis_server.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 #
 # Cookbook Name:: dynatrace
 # Recipes:: memory_analysis_server
@@ -95,7 +97,7 @@
   service_name service
   # For Debian and Ubuntu distros - to correctly stop our service we need the status support which is disabled by default
   supports     :status => true
-  action       [:start, :enable]
+  action       %i[start enable]
 end
 
 ruby_block "Waiting for port #{server_port} to become available" do
diff --git a/recipes/node_info.rb b/recipes/node_info.rb
index a9c6825..0228178 100644
--- a/recipes/node_info.rb
+++ b/recipes/node_info.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 #
 # Cookbook Name:: dynatrace
 # Recipes:: node_info
diff --git a/recipes/one_agent.rb b/recipes/one_agent.rb
index dfd7ad3..973d232 100644
--- a/recipes/one_agent.rb
+++ b/recipes/one_agent.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 #
 # Cookbook Name:: dynatrace
 # Recipes:: one_agent
diff --git a/recipes/prerequisites.rb b/recipes/prerequisites.rb
index 91e993e..1aedba1 100644
--- a/recipes/prerequisites.rb
+++ b/recipes/prerequisites.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 #
 # Cookbook Name:: dynatrace
 # Recipes:: prerequisites
diff --git a/recipes/server.rb b/recipes/server.rb
index eaae3aa..284457a 100644
--- a/recipes/server.rb
+++ b/recipes/server.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 #
 # Cookbook Name:: dynatrace
 # Recipes:: server
@@ -119,7 +121,7 @@
   service_name service
   # For Debian and Ubuntu distros - to correctly stop our service we need the status support which is disabled by default
   supports     :status => true
-  action       [:start, :enable]
+  action       %i[start enable]
 end
 
 max_boot_time = node['dynatrace']['server']['max_boot_time']
diff --git a/recipes/server_ldap_config.rb b/recipes/server_ldap_config.rb
index ff71d4a..a1992a6 100644
--- a/recipes/server_ldap_config.rb
+++ b/recipes/server_ldap_config.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 #
 # Cookbook Name:: dynatrace
 # Recipes:: server_ldap_config
@@ -46,6 +48,6 @@
                                         rest_user,
                                         rest_pass,
                                         body,
-                                        :success_codes => %w(204))
+                                        :success_codes => %w[204])
   end
 end
diff --git a/recipes/server_license.rb b/recipes/server_license.rb
index ad91535..9805513 100644
--- a/recipes/server_license.rb
+++ b/recipes/server_license.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 #
 # Cookbook Name:: dynatrace
 # Recipes:: server_license
diff --git a/recipes/server_pwh_connection.rb b/recipes/server_pwh_connection.rb
index 66057fb..4cd6993 100644
--- a/recipes/server_pwh_connection.rb
+++ b/recipes/server_pwh_connection.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 #
 # Cookbook Name:: dynatrace
 # Recipes:: server_pwh_connection
diff --git a/recipes/server_uninstall.rb b/recipes/server_uninstall.rb
index 7a1fadd..f941b3b 100644
--- a/recipes/server_uninstall.rb
+++ b/recipes/server_uninstall.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 #
 # Cookbook Name:: dynatrace
 # Recipes:: server_uninstall
diff --git a/recipes/server_update.rb b/recipes/server_update.rb
index f8b442d..8a37078 100644
--- a/recipes/server_update.rb
+++ b/recipes/server_update.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # Cookbook Name:: dynatrace
 # Recipes:: server_update
 #
diff --git a/recipes/server_user_groups.rb b/recipes/server_user_groups.rb
index 1ca9ea7..1eaed90 100644
--- a/recipes/server_user_groups.rb
+++ b/recipes/server_user_groups.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 #
 # Cookbook Name:: dynatrace
 # Recipes:: server_user_groups
@@ -49,7 +51,7 @@
                                                      rest_user,
                                                      rest_pass,
                                                      JSON.dump(group_descr),
-                                                     :success_codes => %w(201 204 403))
+                                                     :success_codes => %w[201 204 403])
 
       # Pass over erroneous attempts to modify a group (error 403) - it is normal for some predefined groups
       # e.g. 'Personal System Profile Access' group
diff --git a/recipes/server_users.rb b/recipes/server_users.rb
index cc836df..be65ad8 100644
--- a/recipes/server_users.rb
+++ b/recipes/server_users.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 #
 # Cookbook Name:: dynatrace
 # Recipes:: server_users
@@ -44,7 +46,7 @@
                                           rest_user,
                                           rest_pass,
                                           JSON.dump(user_descr),
-                                          :success_codes => %w(201 204))
+                                          :success_codes => %w[201 204])
     end
   end
   only_if { node['dynatrace']['server']['user_config']['users'] }
diff --git a/recipes/upgrade_system.rb b/recipes/upgrade_system.rb
index 6b0d723..f85b1d9 100644
--- a/recipes/upgrade_system.rb
+++ b/recipes/upgrade_system.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 #
 # Cookbook Name:: upgrade_system
 # Recipes:: dynatrace
diff --git a/recipes/wsagent_package.rb b/recipes/wsagent_package.rb
index 238f2b1..53f3b04 100644
--- a/recipes/wsagent_package.rb
+++ b/recipes/wsagent_package.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 #
 # Cookbook Name:: dynatrace
 # Recipes:: wsagent_package
@@ -103,7 +105,7 @@
     service_name service
     # For Debian and Ubuntu distros - to correctly stop our service we need the status support which is disabled by default
     supports     :status => true
-    action       [:start, :enable]
+    action       %i[start enable]
   end
 elsif platform_family?('windows')
   dynatrace_powershell_scripts_project = "#{installer_cache_dir}\\Dynatrace-Powershell"
diff --git a/recipes/wsagent_package_uninstall.rb b/recipes/wsagent_package_uninstall.rb
index 43c721b..20df320 100644
--- a/recipes/wsagent_package_uninstall.rb
+++ b/recipes/wsagent_package_uninstall.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 #
 # Cookbook Name:: dynatrace
 # Recipes:: wsagent_package_uninstall
diff --git a/resources/configure_ini_files.rb b/resources/configure_ini_files.rb
index c4462af..2ee0a72 100644
--- a/resources/configure_ini_files.rb
+++ b/resources/configure_ini_files.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 #
 # Cookbook Name:: dynatrace
 # Resources:: configure_ini_files
diff --git a/resources/configure_init_scripts.rb b/resources/configure_init_scripts.rb
index 3f6d256..0692d0e 100644
--- a/resources/configure_init_scripts.rb
+++ b/resources/configure_init_scripts.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 #
 # Cookbook Name:: dynatrace
 # Resources:: configure_init_scripts
diff --git a/resources/copy_or_download_file.rb b/resources/copy_or_download_file.rb
index ff7b694..a27eeb7 100644
--- a/resources/copy_or_download_file.rb
+++ b/resources/copy_or_download_file.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 #
 # Cookbook Name:: dynatrace
 # Resources:: copy_or_download_file
diff --git a/resources/delete_directory_by_link.rb b/resources/delete_directory_by_link.rb
index c2af317..68c0005 100644
--- a/resources/delete_directory_by_link.rb
+++ b/resources/delete_directory_by_link.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 #
 # Cookbook Name:: dynatrace
 # Resources:: delete_directory_by_link
diff --git a/resources/java_agent.rb b/resources/java_agent.rb
index 6574acd..28da210 100644
--- a/resources/java_agent.rb
+++ b/resources/java_agent.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 #
 # Cookbook Name:: dynatrace
 # Resource:: java_agent
diff --git a/resources/run_jar_installer.rb b/resources/run_jar_installer.rb
index c2673a6..32d8d19 100644
--- a/resources/run_jar_installer.rb
+++ b/resources/run_jar_installer.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 #
 # Cookbook Name:: dynatrace
 # Resources:: run_jar_installer
diff --git a/resources/run_tar_installer.rb b/resources/run_tar_installer.rb
index b113feb..07c3600 100644
--- a/resources/run_tar_installer.rb
+++ b/resources/run_tar_installer.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 #
 # Cookbook Name:: dynatrace
 # Resources:: run_tar_installer
diff --git a/resources/s3_file.rb b/resources/s3_file.rb
index 955cfd9..d4d853d 100644
--- a/resources/s3_file.rb
+++ b/resources/s3_file.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 #
 # Cookbook Name:: dynatrace
 # Resource:: s3_file
diff --git a/resources/uninstall_package.rb b/resources/uninstall_package.rb
index d5967ae..40d90df 100644
--- a/resources/uninstall_package.rb
+++ b/resources/uninstall_package.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 #
 # Cookbook Name:: dynatrace
 # Resource:: uninstall_package
@@ -22,7 +24,7 @@
     service service_name do
       # For Debian and Ubuntu distros - to correctly stop our service we need the status support which is disabled by default
       supports :status => true
-      action [:stop, :disable]
+      action %i[stop disable]
     end
   end
 
diff --git a/test/integration/agents_package/serverspec/agents_package_spec.rb b/test/integration/agents_package/serverspec/agents_package_spec.rb
index 1923f64..3eb38af 100644
--- a/test/integration/agents_package/serverspec/agents_package_spec.rb
+++ b/test/integration/agents_package/serverspec/agents_package_spec.rb
@@ -1,6 +1,8 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
-if %w(debian redhat ubuntu).include? os[:family]
+if %w[debian redhat ubuntu].include? os[:family]
   describe user('dynatrace') do
     it { should exist }
     it { should belong_to_group 'dynatrace' }
diff --git a/test/integration/agents_package/serverspec/spec_helper.rb b/test/integration/agents_package/serverspec/spec_helper.rb
index b5d2b22..97b5185 100644
--- a/test/integration/agents_package/serverspec/spec_helper.rb
+++ b/test/integration/agents_package/serverspec/spec_helper.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'serverspec'
 
 if (/cygwin|mswin|mingw|bccwin|wince|emx/ =~ RUBY_PLATFORM).nil?
diff --git a/test/integration/agents_package_uninstall/serverspec/agents_package_uninstall_spec.rb b/test/integration/agents_package_uninstall/serverspec/agents_package_uninstall_spec.rb
index 50ac6b6..6eb59b1 100644
--- a/test/integration/agents_package_uninstall/serverspec/agents_package_uninstall_spec.rb
+++ b/test/integration/agents_package_uninstall/serverspec/agents_package_uninstall_spec.rb
@@ -1,6 +1,8 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
-if %w(debian redhat ubuntu).include? os[:family]
+if %w[debian redhat ubuntu].include? os[:family]
   describe file('/opt/dynatrace') do
     it { should_not exist }
   end
diff --git a/test/integration/agents_package_uninstall/serverspec/spec_helper.rb b/test/integration/agents_package_uninstall/serverspec/spec_helper.rb
index b5d2b22..97b5185 100644
--- a/test/integration/agents_package_uninstall/serverspec/spec_helper.rb
+++ b/test/integration/agents_package_uninstall/serverspec/spec_helper.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'serverspec'
 
 if (/cygwin|mswin|mingw|bccwin|wince|emx/ =~ RUBY_PLATFORM).nil?
diff --git a/test/integration/apache_wsagent/serverspec/apache_wsagent_spec.rb b/test/integration/apache_wsagent/serverspec/apache_wsagent_spec.rb
index 086b11e..f089fe4 100644
--- a/test/integration/apache_wsagent/serverspec/apache_wsagent_spec.rb
+++ b/test/integration/apache_wsagent/serverspec/apache_wsagent_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'serverspec'
 
 # Required by serverspec
diff --git a/test/integration/apache_wsagent_uninstall/serverspec/apache_wsagent_uninstall_spec.rb b/test/integration/apache_wsagent_uninstall/serverspec/apache_wsagent_uninstall_spec.rb
index 9e6740b..dabe30a 100644
--- a/test/integration/apache_wsagent_uninstall/serverspec/apache_wsagent_uninstall_spec.rb
+++ b/test/integration/apache_wsagent_uninstall/serverspec/apache_wsagent_uninstall_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'serverspec'
 
 # Required by serverspec
diff --git a/test/integration/collector/serverspec/collector_spec.rb b/test/integration/collector/serverspec/collector_spec.rb
index 15156da..1e1a831 100644
--- a/test/integration/collector/serverspec/collector_spec.rb
+++ b/test/integration/collector/serverspec/collector_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'serverspec'
 
 # Required by serverspec
diff --git a/test/integration/collector_uninstall/serverspec/collector_uninstall_spec.rb b/test/integration/collector_uninstall/serverspec/collector_uninstall_spec.rb
index 14ae170..f57fa01 100644
--- a/test/integration/collector_uninstall/serverspec/collector_uninstall_spec.rb
+++ b/test/integration/collector_uninstall/serverspec/collector_uninstall_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'serverspec'
 
 # Required by serverspec
diff --git a/test/integration/dotnet_agent/serverspec/dotnet_agent_spec.rb b/test/integration/dotnet_agent/serverspec/dotnet_agent_spec.rb
index 2cbabc1..d0c0eff 100644
--- a/test/integration/dotnet_agent/serverspec/dotnet_agent_spec.rb
+++ b/test/integration/dotnet_agent/serverspec/dotnet_agent_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe windows_registry_key('HKLM:\SOFTWARE\Wow6432Node\dynaTrace\Agent\Whitelist\1') do
diff --git a/test/integration/dotnet_agent/serverspec/spec_helper.rb b/test/integration/dotnet_agent/serverspec/spec_helper.rb
index 5a8faa8..cc0f3b4 100644
--- a/test/integration/dotnet_agent/serverspec/spec_helper.rb
+++ b/test/integration/dotnet_agent/serverspec/spec_helper.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'serverspec'
 
 set :backend, :cmd
diff --git a/test/integration/host_agent/serverspec/host_agent_spec.rb b/test/integration/host_agent/serverspec/host_agent_spec.rb
index 1479d55..de24209 100644
--- a/test/integration/host_agent/serverspec/host_agent_spec.rb
+++ b/test/integration/host_agent/serverspec/host_agent_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'serverspec'
 
 # Required by serverspec
diff --git a/test/integration/host_agent_uninstall/serverspec/host_agent_uninstall_spec.rb b/test/integration/host_agent_uninstall/serverspec/host_agent_uninstall_spec.rb
index 5130513..4cd66d7 100644
--- a/test/integration/host_agent_uninstall/serverspec/host_agent_uninstall_spec.rb
+++ b/test/integration/host_agent_uninstall/serverspec/host_agent_uninstall_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'serverspec'
 
 # Required by serverspec
diff --git a/test/integration/java_agent/serverspec/java_agent_spec.rb b/test/integration/java_agent/serverspec/java_agent_spec.rb
index 15020b7..5f28975 100644
--- a/test/integration/java_agent/serverspec/java_agent_spec.rb
+++ b/test/integration/java_agent/serverspec/java_agent_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'serverspec'
 
 # Required by serverspec
diff --git a/test/integration/memory_analysis_server/serverspec/memory_analysis_server_spec.rb b/test/integration/memory_analysis_server/serverspec/memory_analysis_server_spec.rb
index 197ff76..efbcf6a 100644
--- a/test/integration/memory_analysis_server/serverspec/memory_analysis_server_spec.rb
+++ b/test/integration/memory_analysis_server/serverspec/memory_analysis_server_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'serverspec'
 
 # Required by serverspec
diff --git a/test/integration/one_agent/serverspec/one_agent_spec.rb b/test/integration/one_agent/serverspec/one_agent_spec.rb
index 44d5b55..4d27702 100644
--- a/test/integration/one_agent/serverspec/one_agent_spec.rb
+++ b/test/integration/one_agent/serverspec/one_agent_spec.rb
@@ -1,6 +1,8 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
-if %w(debian redhat ubuntu).include? os[:family]
+if %w[debian redhat ubuntu].include? os[:family]
   describe user('dynatrace') do
     it { should exist }
     it { should belong_to_group 'dynatrace' }
diff --git a/test/integration/one_agent/serverspec/spec_helper.rb b/test/integration/one_agent/serverspec/spec_helper.rb
index b5d2b22..97b5185 100644
--- a/test/integration/one_agent/serverspec/spec_helper.rb
+++ b/test/integration/one_agent/serverspec/spec_helper.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'serverspec'
 
 if (/cygwin|mswin|mingw|bccwin|wince|emx/ =~ RUBY_PLATFORM).nil?
diff --git a/test/integration/server/serverspec/server_spec.rb b/test/integration/server/serverspec/server_spec.rb
index 4002fb5..b54450a 100644
--- a/test/integration/server/serverspec/server_spec.rb
+++ b/test/integration/server/serverspec/server_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'json'
 require 'net/http'
 require 'serverspec'
diff --git a/test/integration/server_uninstall/serverspec/server_uninstall_spec.rb b/test/integration/server_uninstall/serverspec/server_uninstall_spec.rb
index 4ee07e2..e30ccb0 100644
--- a/test/integration/server_uninstall/serverspec/server_uninstall_spec.rb
+++ b/test/integration/server_uninstall/serverspec/server_uninstall_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'serverspec'
 
 # Required by serverspec
diff --git a/test/integration/server_update/serverspec/server_update_spec.rb b/test/integration/server_update/serverspec/server_update_spec.rb
index 1e804ca..f298f6e 100644
--- a/test/integration/server_update/serverspec/server_update_spec.rb
+++ b/test/integration/server_update/serverspec/server_update_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'net/http'
 require 'rexml/document'
 include REXML
diff --git a/test/integration/wsagent_package/serverspec/spec_helper.rb b/test/integration/wsagent_package/serverspec/spec_helper.rb
index b5d2b22..97b5185 100644
--- a/test/integration/wsagent_package/serverspec/spec_helper.rb
+++ b/test/integration/wsagent_package/serverspec/spec_helper.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'serverspec'
 
 if (/cygwin|mswin|mingw|bccwin|wince|emx/ =~ RUBY_PLATFORM).nil?
diff --git a/test/integration/wsagent_package/serverspec/wsagent_package_spec.rb b/test/integration/wsagent_package/serverspec/wsagent_package_spec.rb
index 2ccc7f3..9f69284 100644
--- a/test/integration/wsagent_package/serverspec/wsagent_package_spec.rb
+++ b/test/integration/wsagent_package/serverspec/wsagent_package_spec.rb
@@ -1,6 +1,8 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
-if %w(debian redhat ubuntu).include? os[:family]
+if %w[debian redhat ubuntu].include? os[:family]
   describe user('dynatrace') do
     it { should exist }
     it { should belong_to_group 'dynatrace' }
diff --git a/test/integration/wsagent_package_uninstall/serverspec/spec_helper.rb b/test/integration/wsagent_package_uninstall/serverspec/spec_helper.rb
index b5d2b22..97b5185 100644
--- a/test/integration/wsagent_package_uninstall/serverspec/spec_helper.rb
+++ b/test/integration/wsagent_package_uninstall/serverspec/spec_helper.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'serverspec'
 
 if (/cygwin|mswin|mingw|bccwin|wince|emx/ =~ RUBY_PLATFORM).nil?
diff --git a/test/integration/wsagent_package_uninstall/serverspec/wsagent_package_uninstall_spec.rb b/test/integration/wsagent_package_uninstall/serverspec/wsagent_package_uninstall_spec.rb
index 48c5132..f3cdabe 100644
--- a/test/integration/wsagent_package_uninstall/serverspec/wsagent_package_uninstall_spec.rb
+++ b/test/integration/wsagent_package_uninstall/serverspec/wsagent_package_uninstall_spec.rb
@@ -1,6 +1,8 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
-if %w(debian redhat ubuntu).include? os[:family]
+if %w[debian redhat ubuntu].include? os[:family]
   describe file('/opt/dynatrace') do
     it { should_not exist }
   end