diff --git a/vc_zoom/conftest.py b/vc_zoom/conftest.py
index 7c568e8..2dba5e3 100644
--- a/vc_zoom/conftest.py
+++ b/vc_zoom/conftest.py
@@ -1 +1,8 @@
+# This file is part of the Indico plugins.
+# Copyright (C) 2020 CERN and ENEA
+#
+# The Indico plugins are free software; you can redistribute
+# them and/or modify them under the terms of the MIT License;
+# see the LICENSE file for more details.
+
 pytest_plugins = 'indico'
diff --git a/vc_zoom/setup.py b/vc_zoom/setup.py
index 58af122..1460a9c 100644
--- a/vc_zoom/setup.py
+++ b/vc_zoom/setup.py
@@ -1,3 +1,10 @@
+# This file is part of the Indico plugins.
+# Copyright (C) 2020 CERN and ENEA
+#
+# The Indico plugins are free software; you can redistribute
+# them and/or modify them under the terms of the MIT License;
+# see the LICENSE file for more details.
+
 from __future__ import unicode_literals
 
 from setuptools import find_packages, setup
diff --git a/vc_zoom/tests/operation_test.py b/vc_zoom/tests/operation_test.py
index 7e809a7..1483528 100644
--- a/vc_zoom/tests/operation_test.py
+++ b/vc_zoom/tests/operation_test.py
@@ -1,3 +1,9 @@
+# This file is part of the Indico plugins.
+# Copyright (C) 2020 CERN and ENEA
+#
+# The Indico plugins are free software; you can redistribute
+# them and/or modify them under the terms of the MIT License;
+# see the LICENSE file for more details.
 
 import pytest