diff --git a/src/main/scala/uk/ac/soton/ecs/can/core/BlockInitializer.scala b/src/main/scala/uk/ac/soton/ecs/can/core/BlockInitializer.scala
index 861a61d58096f70aa16a034ddf9ef4399a08c820..f69ebcfb09075890bbce23eaa2549c674f71abde 100644
--- a/src/main/scala/uk/ac/soton/ecs/can/core/BlockInitializer.scala
+++ b/src/main/scala/uk/ac/soton/ecs/can/core/BlockInitializer.scala
@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: 2021 Minyong Li <ml10g20@soton.ac.uk>
+// SPDX-License-Identifier: CERN-OHL-W-2.0
+
 package uk.ac.soton.ecs.can.core
 
 import chisel3._
diff --git a/src/test/scala/uk/ac/soton/ecs/can/core/BlockInitializerTest.scala b/src/test/scala/uk/ac/soton/ecs/can/core/BlockInitializerTest.scala
index d39d6d9e6ebf2cee1042191ccb65651934e59b29..f5f53245111ab4585c3c04657329b2f2e0bf7b0a 100644
--- a/src/test/scala/uk/ac/soton/ecs/can/core/BlockInitializerTest.scala
+++ b/src/test/scala/uk/ac/soton/ecs/can/core/BlockInitializerTest.scala
@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: 2021 Minyong Li <ml10g20@soton.ac.uk>
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 package uk.ac.soton.ecs.can.core
 
 import org.scalatest._