diff --git a/lib/pleroma/web/streamer/ping.ex b/lib/pleroma/web/streamer/ping.ex
index f77cbb95c..db3e68abe 100644
--- a/lib/pleroma/web/streamer/ping.ex
+++ b/lib/pleroma/web/streamer/ping.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.Web.Streamer.Ping do
   use GenServer
   require Logger
diff --git a/lib/pleroma/web/streamer/state.ex b/lib/pleroma/web/streamer/state.ex
index c48752d95..5ce3ebb8a 100644
--- a/lib/pleroma/web/streamer/state.ex
+++ b/lib/pleroma/web/streamer/state.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.Web.Streamer.State do
   use GenServer
   require Logger
diff --git a/lib/pleroma/web/streamer/streamer_socket.ex b/lib/pleroma/web/streamer/streamer_socket.ex
index f006c0306..cf0fa3077 100644
--- a/lib/pleroma/web/streamer/streamer_socket.ex
+++ b/lib/pleroma/web/streamer/streamer_socket.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.Web.Streamer.StreamerSocket do
   defstruct transport_pid: nil, user: nil
 
diff --git a/lib/pleroma/web/streamer/supervisor.ex b/lib/pleroma/web/streamer/supervisor.ex
index 6afe19323..ec5985085 100644
--- a/lib/pleroma/web/streamer/supervisor.ex
+++ b/lib/pleroma/web/streamer/supervisor.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.Web.Streamer.Supervisor do
   use Supervisor
 
diff --git a/lib/pleroma/web/streamer/worker.ex b/lib/pleroma/web/streamer/worker.ex
index 5804508eb..bbb7483e5 100644
--- a/lib/pleroma/web/streamer/worker.ex
+++ b/lib/pleroma/web/streamer/worker.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.Web.Streamer.Worker do
   use GenServer