diff --git a/main.tf b/main.tf
index f535a57f..5a80de8f 100644
--- a/main.tf
+++ b/main.tf
@@ -1,3 +1,6 @@
+# Copyright (c) HashiCorp, Inc.
+# SPDX-License-Identifier: MPL-2.0
+
 # -----------------------------------------------------------------------------
 # Azure resource groups
 # -----------------------------------------------------------------------------