diff --git a/.rubocop.yml b/.rubocop.yml
index c6842ef..381d0b7 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -53,9 +53,6 @@ Style/Documentation:
 Style/FormatStringToken:
   Enabled: false
 
-Style/FrozenStringLiteralComment:
-  Enabled: false
-
 Style/GuardClause:
   Enabled: false
 
diff --git a/Gemfile b/Gemfile
index fa75df1..7f4f5e9 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 source 'https://rubygems.org'
 
 gemspec
diff --git a/Rakefile b/Rakefile
index ba57a1f..444ff67 100644
--- a/Rakefile
+++ b/Rakefile
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'bundler/gem_tasks'
 require 'rspec/core/rake_task'
 require 'rubocop/rake_task'
diff --git a/exe/openvpn-status-web b/exe/openvpn-status-web
index d9d49ee..bad8872 100755
--- a/exe/openvpn-status-web
+++ b/exe/openvpn-status-web
@@ -1,4 +1,5 @@
 #!/usr/bin/env ruby
+# frozen_string_literal: true
 
 require 'openvpn-status-web'
 
diff --git a/lib/openvpn-status-web.rb b/lib/openvpn-status-web.rb
index eed59fd..589145e 100755
--- a/lib/openvpn-status-web.rb
+++ b/lib/openvpn-status-web.rb
@@ -1,4 +1,5 @@
 #!/usr/bin/env ruby
+# frozen_string_literal: true
 
 require 'date'
 require 'etc'
diff --git a/lib/openvpn-status-web/int_patch.rb b/lib/openvpn-status-web/int_patch.rb
index f8baf7b..b147f12 100644
--- a/lib/openvpn-status-web/int_patch.rb
+++ b/lib/openvpn-status-web/int_patch.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 
 class Integer
   def as_bytes
diff --git a/lib/openvpn-status-web/parser/modern_stateless.rb b/lib/openvpn-status-web/parser/modern_stateless.rb
index 84b8f56..b8e65fa 100644
--- a/lib/openvpn-status-web/parser/modern_stateless.rb
+++ b/lib/openvpn-status-web/parser/modern_stateless.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 
 module OpenVPNStatusWeb
   module Parser
diff --git a/lib/openvpn-status-web/parser/v1.rb b/lib/openvpn-status-web/parser/v1.rb
index 4eb2b4a..4c806b5 100644
--- a/lib/openvpn-status-web/parser/v1.rb
+++ b/lib/openvpn-status-web/parser/v1.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 
 module OpenVPNStatusWeb
   module Parser
diff --git a/lib/openvpn-status-web/parser/v2.rb b/lib/openvpn-status-web/parser/v2.rb
index cac3b37..b8a9842 100644
--- a/lib/openvpn-status-web/parser/v2.rb
+++ b/lib/openvpn-status-web/parser/v2.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 
 require_relative 'modern_stateless'
 
diff --git a/lib/openvpn-status-web/parser/v3.rb b/lib/openvpn-status-web/parser/v3.rb
index 149883a..149bab3 100644
--- a/lib/openvpn-status-web/parser/v3.rb
+++ b/lib/openvpn-status-web/parser/v3.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 
 require_relative 'modern_stateless'
 
diff --git a/lib/openvpn-status-web/status.rb b/lib/openvpn-status-web/status.rb
index 8dbd39a..f9861fb 100644
--- a/lib/openvpn-status-web/status.rb
+++ b/lib/openvpn-status-web/status.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 
 module OpenVPNStatusWeb
   class Status
diff --git a/lib/openvpn-status-web/version.rb b/lib/openvpn-status-web/version.rb
index 6ff45ad..dbdb4ca 100644
--- a/lib/openvpn-status-web/version.rb
+++ b/lib/openvpn-status-web/version.rb
@@ -1,4 +1,5 @@
+# frozen_string_literal: true
 
 module OpenVPNStatusWeb
-  VERSION = '2.0.0'.freeze
+  VERSION = '2.0.0'
 end
diff --git a/openvpn-status-web.gemspec b/openvpn-status-web.gemspec
index 98d1fb4..0682004 100644
--- a/openvpn-status-web.gemspec
+++ b/openvpn-status-web.gemspec
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 
 require_relative 'lib/openvpn-status-web/version'
 
diff --git a/spec/parser/modern_stateless_spec.rb b/spec/parser/modern_stateless_spec.rb
index 4d0928d..6e916a4 100644
--- a/spec/parser/modern_stateless_spec.rb
+++ b/spec/parser/modern_stateless_spec.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 
 require_relative '../spec_helper'
 
diff --git a/spec/parser/v1_spec.rb b/spec/parser/v1_spec.rb
index e332551..ff7baba 100644
--- a/spec/parser/v1_spec.rb
+++ b/spec/parser/v1_spec.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 
 require_relative '../spec_helper'
 
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index ca9d8d4..91c210b 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 
 require 'rubygems'
 require 'bundler/setup'