diff --git a/specification.rst b/specification.rst
index b2c502f..b4194a9 100644
--- a/specification.rst
+++ b/specification.rst
@@ -1,3 +1,6 @@
+.. SPDX-FileCopyrightText: 2021 Open Networking Foundation <info@opennetworking.org>
+.. SPDX-License-Identifier: Apache-2.0
+
 Specification
 =============