diff --git a/glances/plugins/containers/glances_docker.py b/glances/plugins/containers/glances_docker.py
index 61f3623e..7e6951a7 100644
--- a/glances/plugins/containers/glances_docker.py
+++ b/glances/plugins/containers/glances_docker.py
@@ -1,3 +1,12 @@
+# -*- coding: utf-8 -*-
+#
+# This file is part of Glances.
+#
+# SPDX-FileCopyrightText: 2022 Nicolas Hennion <nicolas@nicolargo.com>
+#
+# SPDX-License-Identifier: LGPL-3.0-only
+#
+
 """Docker Extension unit for Glances' Containers plugin."""
 import time
 
diff --git a/glances/plugins/containers/glances_podman.py b/glances/plugins/containers/glances_podman.py
index c1bc3801..c61a3ab2 100644
--- a/glances/plugins/containers/glances_podman.py
+++ b/glances/plugins/containers/glances_podman.py
@@ -1,3 +1,11 @@
+# -*- coding: utf-8 -*-
+#
+# This file is part of Glances.
+#
+# SPDX-FileCopyrightText: 2022 Nicolas Hennion <nicolas@nicolargo.com>
+#
+# SPDX-License-Identifier: LGPL-3.0-only
+
 """Podman Extension unit for Glances' Containers plugin."""
 import time
 from datetime import datetime
diff --git a/glances/plugins/containers/stats_streamer.py b/glances/plugins/containers/stats_streamer.py
index 0bf7d38e..9218c483 100644
--- a/glances/plugins/containers/stats_streamer.py
+++ b/glances/plugins/containers/stats_streamer.py
@@ -1,3 +1,11 @@
+# -*- coding: utf-8 -*-
+#
+# This file is part of Glances.
+#
+# SPDX-FileCopyrightText: 2022 Nicolas Hennion <nicolas@nicolargo.com>
+#
+# SPDX-License-Identifier: LGPL-3.0-only
+
 import threading
 import time