diff --git a/metrics.py b/metrics.py
index 877c4d9..36aaa28 100644
--- a/metrics.py
+++ b/metrics.py
@@ -1,3 +1,8 @@
+# SPDX-FileCopyrightText: 2020 The Magma Authors.
+# SPDX-FileCopyrightText: 2022 Open Networking Foundation <support@opennetworking.org>
+#
+# SPDX-License-Identifier: BSD-3-Clause
+
 """
 Copyright 2020 The Magma Authors.