diff --git a/assessment-demo/index.html b/assessment-demo/index.html
new file mode 100644
index 0000000..af39e69
--- /dev/null
+++ b/assessment-demo/index.html
@@ -0,0 +1,17 @@
+<!doctype html>
+<html lang="en">
+<head>
+  <meta charset="utf-8">
+  <title>Redirecting…</title>
+  <meta name="robots" content="noindex">
+  <script>
+    // Old links point to https-deeplearning-ai.github.io/assessment-demo/,
+    // which now redirects to assessment.deeplearning.ai/assessment-demo/.
+    // The site lives at the domain root, so forward there and keep ?a=…&uh=….
+    location.replace("/" + location.search + location.hash);
+  </script>
+</head>
+<body>
+  <p>Redirecting… <a href="/">Continue to the assessment</a></p>
+</body>
+</html>