diff --git a/data/api/client-server/read_markers.yaml b/data/api/client-server/read_markers.yaml
index 1ee40a0c..ddb02837 100644
--- a/data/api/client-server/read_markers.yaml
+++ b/data/api/client-server/read_markers.yaml
@@ -1,4 +1,5 @@
 # Copyright 2018 New Vector Ltd
+# Copyright 2022 The Matrix.org Foundation C.I.C.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/data/api/client-server/receipts.yaml b/data/api/client-server/receipts.yaml
index b5d0c6cf..28742dbe 100644
--- a/data/api/client-server/receipts.yaml
+++ b/data/api/client-server/receipts.yaml
@@ -1,4 +1,5 @@
 # Copyright 2016 OpenMarket Ltd
+# Copyright 2022 The Matrix.org Foundation C.I.C.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.