diff --git a/lib/pleroma/workers/purge_expired_activity.ex b/lib/pleroma/workers/purge_expired_activity.ex
index 44a8ad0b9..42e2ae79c 100644
--- a/lib/pleroma/workers/purge_expired_activity.ex
+++ b/lib/pleroma/workers/purge_expired_activity.ex
@@ -1,3 +1,7 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
 defmodule Pleroma.Workers.PurgeExpiredActivity do
   @moduledoc """
   Worker which purges expired activity.