4 files changed, 5 insertions, 0 deletions
diff --git a/synapse/crypto/__init__.py b/synapse/crypto/__init__.py
index 3d833a2e44..fcd2134c89 100644
--- a/synapse/crypto/__init__.py
+++ b/synapse/crypto/__init__.py
@@ -1,6 +1,7 @@
 #
 # This file is licensed under the Affero General Public License (AGPL) version 3.
 #
+# 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/crypto/context_factory.py b/synapse/crypto/context_factory.py
index d7c4490fc4..d15f1fadfd 100644
--- a/synapse/crypto/context_factory.py
+++ b/synapse/crypto/context_factory.py
@@ -1,6 +1,7 @@
 #
 # This file is licensed under the Affero General Public License (AGPL) version 3.
 #
+# 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/crypto/event_signing.py b/synapse/crypto/event_signing.py
index 87a6986c94..b85df1ce42 100644
--- a/synapse/crypto/event_signing.py
+++ b/synapse/crypto/event_signing.py
@@ -1,6 +1,8 @@
 #
 # This file is licensed under the Affero General Public License (AGPL) version 3.
 #
+# Copyright 2020 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/crypto/keyring.py b/synapse/crypto/keyring.py
index cbb3ce14d1..1e7e5f70fe 100644
--- a/synapse/crypto/keyring.py
+++ b/synapse/crypto/keyring.py
@@ -1,6 +1,7 @@
 #
 # This file is licensed under the Affero General Public License (AGPL) version 3.
 #
+# Copyright 2014-2021 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