1 files changed, 2 insertions, 0 deletions
diff --git a/synapse/metrics/_twisted_exposition.py b/synapse/metrics/_twisted_exposition.py
index 4fcd394c0d..9652ca83fb 100644
--- a/synapse/metrics/_twisted_exposition.py
+++ b/synapse/metrics/_twisted_exposition.py
@@ -1,6 +1,8 @@
 #
 # This file is licensed under the Affero General Public License (AGPL) version 3.
 #
+# Copyright 2019 Matrix.org Foundation C.I.C.
+# Copyright 2015-2019 Prometheus Python Client Developers
 # Copyright (C) 2023 New Vector, Ltd
 #
 # This program is free software: you can redistribute it and/or modify