diff --git a/src/SequenceDiagramViewerPage.tsx b/src/SequenceDiagramViewerPage.tsx
index 2b98baa..f06d3ca 100644
--- a/src/SequenceDiagramViewerPage.tsx
+++ b/src/SequenceDiagramViewerPage.tsx
@@ -1,3 +1,19 @@
+/*
+Copyright 2022 New Vector Ltd
+
+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.
+*/
+
 import React, { useCallback, useState } from "react";
 
 import { SequenceDiagramViewer } from "./room/GroupCallInspector";
diff --git a/src/Tooltip.tsx b/src/Tooltip.tsx
index 195443d..14905d9 100644
--- a/src/Tooltip.tsx
+++ b/src/Tooltip.tsx
@@ -1,3 +1,19 @@
+/*
+Copyright 2022 New Vector Ltd
+
+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.
+*/
+
 import React, {
   ForwardedRef,
   forwardRef,