diff --git a/spec/services/vns/engine_spec.rb b/spec/services/vns/engine_spec.rb
index 974f342..d4064f6 100644
--- a/spec/services/vns/engine_spec.rb
+++ b/spec/services/vns/engine_spec.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024 Manuel Bustillo
+
 require 'rails_helper'
 
 module VNS