diff --git a/synapse/media/_base.py b/synapse/media/_base.py
index acd0a5a2e8..3fbed6062f 100644
--- a/synapse/media/_base.py
+++ b/synapse/media/_base.py
@@ -1,6 +1,8 @@
#
# This file is licensed under the Affero General Public License (AGPL) version 3.
#
+# Copyright 2019-2021 The Matrix.org Foundation C.I.C.
+# Copyright 2014-2016 OpenMarket Ltd
# Copyright (C) 2023 New Vector, Ltd
#
# This program is free software: you can redistribute it and/or modify
diff --git a/synapse/media/filepath.py b/synapse/media/filepath.py
index 86ab77ce80..3d7863e2fb 100644
--- a/synapse/media/filepath.py
+++ b/synapse/media/filepath.py
@@ -1,6 +1,8 @@
#
# This file is licensed under the Affero General Public License (AGPL) version 3.
#
+# Copyright 2020-2021 The Matrix.org Foundation C.I.C.
+# Copyright 2014-2016 OpenMarket Ltd
# Copyright (C) 2023 New Vector, Ltd
#
# This program is free software: you can redistribute it and/or modify
diff --git a/synapse/media/media_repository.py b/synapse/media/media_repository.py
index 4cb975d377..52859ed490 100644
--- a/synapse/media/media_repository.py
+++ b/synapse/media/media_repository.py
@@ -1,6 +1,8 @@
#
# This file is licensed under the Affero General Public License (AGPL) version 3.
#
+# Copyright 2018-2021 The Matrix.org Foundation C.I.C.
+# Copyright 2014-2016 OpenMarket Ltd
# Copyright (C) 2023 New Vector, Ltd
#
# This program is free software: you can redistribute it and/or modify
diff --git a/synapse/media/media_storage.py b/synapse/media/media_storage.py
index 0cf8a9be7e..b45b319f5c 100644
--- a/synapse/media/media_storage.py
+++ b/synapse/media/media_storage.py
@@ -1,6 +1,7 @@
#
# This file is licensed under the Affero General Public License (AGPL) version 3.
#
+# Copyright 2018-2021 The Matrix.org Foundation C.I.C.
# Copyright (C) 2023 New Vector, Ltd
#
# This program is free software: you can redistribute it and/or modify
diff --git a/synapse/media/oembed.py b/synapse/media/oembed.py
index 0bcfc4aab6..94ece30459 100644
--- a/synapse/media/oembed.py
+++ b/synapse/media/oembed.py
@@ -1,6 +1,7 @@
#
# This file is licensed under the Affero General Public License (AGPL) version 3.
#
+# Copyright 2021 The Matrix.org Foundation C.I.C.
# Copyright (C) 2023 New Vector, Ltd
#
# This program is free software: you can redistribute it and/or modify
diff --git a/synapse/media/preview_html.py b/synapse/media/preview_html.py
index ee77c7da56..8a2c098d53 100644
--- a/synapse/media/preview_html.py
+++ b/synapse/media/preview_html.py
@@ -1,6 +1,7 @@
#
# This file is licensed under the Affero General Public License (AGPL) version 3.
#
+# Copyright 2021 The Matrix.org Foundation C.I.C.
# Copyright (C) 2023 New Vector, Ltd
#
# This program is free software: you can redistribute it and/or modify
diff --git a/synapse/media/storage_provider.py b/synapse/media/storage_provider.py
index f91772a9f2..06e5d27a53 100644
--- a/synapse/media/storage_provider.py
+++ b/synapse/media/storage_provider.py
@@ -1,6 +1,7 @@
#
# This file is licensed under the Affero General Public License (AGPL) version 3.
#
+# Copyright 2018-2021 The Matrix.org Foundation C.I.C.
# Copyright (C) 2023 New Vector, Ltd
#
# This program is free software: you can redistribute it and/or modify
diff --git a/synapse/media/thumbnailer.py b/synapse/media/thumbnailer.py
index 810d5012ca..5538020bec 100644
--- a/synapse/media/thumbnailer.py
+++ b/synapse/media/thumbnailer.py
@@ -1,6 +1,8 @@
#
# This file is licensed under the Affero General Public License (AGPL) version 3.
#
+# Copyright 2020-2021 The Matrix.org Foundation C.I.C.
+# Copyright 2014-2016 OpenMarket Ltd
# Copyright (C) 2023 New Vector, Ltd
#
# This program is free software: you can redistribute it and/or modify
diff --git a/synapse/media/url_previewer.py b/synapse/media/url_previewer.py
index ef62575057..3897823b35 100644
--- a/synapse/media/url_previewer.py
+++ b/synapse/media/url_previewer.py
@@ -1,6 +1,8 @@
#
# This file is licensed under the Affero General Public License (AGPL) version 3.
#
+# Copyright 2020-2023 The Matrix.org Foundation C.I.C.
+# Copyright 2016 OpenMarket Ltd
# Copyright (C) 2023 New Vector, Ltd
#
# This program is free software: you can redistribute it and/or modify
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