diff --git a/bin/setup b/bin/setup
index 5853b5ea8..ac9f62467 100755
--- a/bin/setup
+++ b/bin/setup
@@ -1,4 +1,6 @@
 #!/usr/bin/env ruby
+# frozen_string_literal: true
+
 require 'fileutils'
 
 # path to your application root.
diff --git a/bin/yarn b/bin/yarn
index b24854dce..d64964dfa 100755
--- a/bin/yarn
+++ b/bin/yarn
@@ -1,4 +1,5 @@
 #!/usr/bin/env ruby
+ # frozen_string_literal: true 
 APP_ROOT = File.expand_path('..', __dir__)
 Dir.chdir(APP_ROOT) do
   exec "yarnpkg", *ARGV
diff --git a/config/puma.rb b/config/puma.rb
index 5ed443774..a47b28904 100644
--- a/config/puma.rb
+++ b/config/puma.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # Puma can serve each request in a thread from an internal thread pool.
 # The `threads` method setting takes two numbers: a minimum and maximum.
 # Any libraries that use thread pools should be configured to match