diff --git a/spec/requests/schemas.rb b/spec/requests/schemas.rb
index eb51216..066405e 100644
--- a/spec/requests/schemas.rb
+++ b/spec/requests/schemas.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # Copyright (C) 2024 Manuel Bustillo
 
 module Swagger
@@ -7,13 +9,13 @@ module Swagger
       email: { type: :string, format: :email },
       created_at: SwaggerResponseHelper::TIMESTAMP,
       updated_at: SwaggerResponseHelper::TIMESTAMP
-    }
+    }.freeze
 
-    ID = {
+    ID = { # rubocop:disable Style/MutableConstant -- rswag modifies in: :path parameters
       name: 'id',
       in: :path,
       type: :string,
-      format: :uuid,
+      format: :uuid
     }
 
     GROUP = {
@@ -21,18 +23,18 @@ module Swagger
       icon: { type: :string, example: 'pi pi-crown', description: 'The CSS classes used by the icon' },
       parent_id: { type: :string, format: :uuid },
       color: { type: :string, pattern: '^#(?:[0-9a-fA-F]{3}){1,2}$' }
-    }
+    }.freeze
 
     EXPENSE = {
       name: { type: :string },
       amount: { type: :number, minimum: 0 },
       pricing_type: { type: :string, enum: Expense.pricing_types.keys }
-    }
+    }.freeze
 
-    SLUG = {
+    SLUG = { # rubocop:disable Style/MutableConstant -- rswag modifies in: :path parameters
       name: 'slug',
       in: :path,
-      type: :string, 
+      type: :string,
       pattern: Wedding::SLUG_REGEX,
       example: :default,
       description: 'Wedding slug'
@@ -47,6 +49,6 @@ module Swagger
           answer: { type: :string }
         }
       }
-    } 
+    }.freeze
   end
-end
\ No newline at end of file
+end