diff --git a/lib/pleroma/object/containment.ex b/lib/pleroma/object/containment.ex
index 2f4687fa2..ada9da0bb 100644
--- a/lib/pleroma/object/containment.ex
+++ b/lib/pleroma/object/containment.ex
@@ -1,3 +1,7 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
 defmodule Pleroma.Object.Containment do
   @moduledoc """
   This module contains some useful functions for containing objects to specific