diff --git a/sentinel.hcl b/sentinel.hcl
index 39c46d0..4f0d3d2 100644
--- a/sentinel.hcl
+++ b/sentinel.hcl
@@ -1,3 +1,6 @@
+# Copyright (c) HashiCorp, Inc.
+# SPDX-License-Identifier: MPL-2.0
+
 policy "restrict-aws-instances-type-and-tag" {
   enforcement_level = "hard-mandatory"
 }