diff --git a/index.html b/index.html
index e9ac780f..27d732d6 100644
--- a/index.html
+++ b/index.html
@@ -1,9 +1,10 @@
 <!DOCTYPE html>
-<html>
+<html lang="en">
   <head>
     <meta charset="utf-8">
     <meta name="viewport" content="width=device-width, initial-scale=1">
     <title>Tinode example: chat web application in react.js</title>
+    <link rel="manifest" href="manifest.json">
     <link id="shortcut-icon" rel="shortcut icon" href="img/logo32x32.png" />
     <link rel="apple-touch-icon" sizes="192x192" href="img/logo192.png" type="image/png" />
     <!-- Browser styling for Chrome, FF, Opera -->