diff --git a/app/fields/jwt_field.rb b/app/fields/jwt_field.rb
index 44b36d7e6..188ca2f08 100644
--- a/app/fields/jwt_field.rb
+++ b/app/fields/jwt_field.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require "administrate/field/base"
 
 class JwtField < Administrate::Field::Base