diff --git a/twenty-cli/.rubocop.yml b/twenty-cli/.rubocop.yml
index f849f2e..bf6966d 100644
--- a/twenty-cli/.rubocop.yml
+++ b/twenty-cli/.rubocop.yml
@@ -15,6 +15,9 @@ AllCops:
   Include:
     - lib/*.rb
     - lib/**/*.rb
+    - libexec/*
+    - libexec/twenty/*
+    - bin/*
     - test/*_test.rb
 
 ##
diff --git a/twenty-cli/bin/20 b/twenty-cli/bin/20
index 792ab1d..f2a1e0f 100755
--- a/twenty-cli/bin/20
+++ b/twenty-cli/bin/20
@@ -1,2 +1,4 @@
 #!/usr/bin/env ruby
+# frozen_string_literal: true
+
 Process.wait spawn([File.join(__dir__, "twenty"), "20"], *ARGV)
diff --git a/twenty-cli/lib/twenty-cli/command/mixin/common_option_mixin.rb b/twenty-cli/lib/twenty-cli/command/mixin/common_option_mixin.rb
index ef935d2..3b5fc2a 100644
--- a/twenty-cli/lib/twenty-cli/command/mixin/common_option_mixin.rb
+++ b/twenty-cli/lib/twenty-cli/command/mixin/common_option_mixin.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Twenty::Command
   module CommonOptionMixin
     def self.included(mod)
diff --git a/twenty-cli/lib/twenty-cli/command/mixin/sqlite_mixin.rb b/twenty-cli/lib/twenty-cli/command/mixin/sqlite_mixin.rb
index 11609a9..501f209 100644
--- a/twenty-cli/lib/twenty-cli/command/mixin/sqlite_mixin.rb
+++ b/twenty-cli/lib/twenty-cli/command/mixin/sqlite_mixin.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Twenty::Command::SQLiteMixin
   def run_command(options)
     path = options.database || Twenty.default_database