diff --git a/spec/services/tables/shift_spec.rb b/spec/services/tables/shift_spec.rb
index 4c24927..e4c48af 100644
--- a/spec/services/tables/shift_spec.rb
+++ b/spec/services/tables/shift_spec.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024 Manuel Bustillo
+
 require 'rails_helper'
 
 module Tables