diff --git a/app/queries/expenses/total_query.rb b/app/queries/expenses/total_query.rb
index 09bf30b..5ed4ca9 100644
--- a/app/queries/expenses/total_query.rb
+++ b/app/queries/expenses/total_query.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024 Manuel Bustillo
+
 module Expenses
   class TotalQuery
     def call