diff --git a/src/ui/web/session/room/timeline/common.js b/src/ui/web/session/room/timeline/common.js
index 848f1cf5..f72f51f0 100644
--- a/src/ui/web/session/room/timeline/common.js
+++ b/src/ui/web/session/room/timeline/common.js
@@ -1,3 +1,20 @@
+/*
+Copyright 2020 Bruno Windels <bruno@windels.cloud>
+Copyright 2020 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.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
 export function renderMessage(t, vm, children) {
     const classes = {
         "TextMessageView": true,