diff --git a/wwwroot/404.html b/wwwroot/404.html
new file mode 100644
index 0000000..c84cd2b
--- /dev/null
+++ b/wwwroot/404.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="utf-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <title>TrackBlazor</title>
+    <base href="/" />
+    <link href="_content/Microsoft.FluentUI.AspNetCore.Components/css/reboot.css" rel="stylesheet" />
+    <link rel="stylesheet" href="css/app.css" />
+    <link rel="icon" type="image/x-icon" href="favicon.ico" />
+    <link href="TrackBlazor.styles.css" rel="stylesheet" />
+</head>
+
+<body>
+    <div id="app">
+        <svg class="loading-progress">
+            <circle r="40%" cx="50%" cy="50%" />
+            <circle r="40%" cx="50%" cy="50%" />
+        </svg>
+        <div class="loading-progress-text"></div>
+    </div>
+
+    <div id="blazor-error-ui">
+        An unhandled error has occurred.
+        <a href="." class="reload">Reload</a>
+        <span class="dismiss">🗙</span>
+    </div>
+    <script src="_framework/blazor.webassembly.js"></script>
+    <script src="_framework/aspnetcore-browser-refresh.js"></script>
+
+</body>
+
+</html>
