diff --git a/public/update.html b/public/update.html
index e69de29..fcbeb4c 100644
--- a/public/update.html
+++ b/public/update.html
@@ -0,0 +1,44 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8" />
+    <title>Updating...</title>
+    <meta name="viewport" content="width=device-width, initial-scale=1" />
+    <style>
+      body {
+        font-family: sans-serif;
+        padding: 2em;
+        text-align: center;
+      }
+    </style>
+  </head>
+  <body>
+    <h1>Updating App…</h1>
+    <p>Please wait while we refresh your version.</p>
+
+    <script>
+      async function clean() {
+        // Unregister all SWs
+        if ('serviceWorker' in navigator) {
+          const regs = await navigator.serviceWorker.getRegistrations();
+          for (const reg of regs) {
+            await reg.unregister();
+          }
+        }
+
+        // Delete all caches
+        if ('caches' in window) {
+          const keys = await caches.keys();
+          for (const key of keys) {
+            await caches.delete(key);
+          }
+        }
+
+        // Hard reload
+        location.href = '/';
+      }
+
+      clean();
+    </script>
+  </body>
+</html>
