diff --git a/frontend/app.js b/frontend/app.js
index 2f3f7c0..bbafd6a 100755
--- a/frontend/app.js
+++ b/frontend/app.js
@@ -8819,9 +8819,10 @@ async function maybeShowUpdateBanner() {
     prefetchUpdate();
     // Ask only once the new build is fully on disk, so "Refresh UI" is an
     // instant swap. Until then keep downloading quietly and re-check; if the
-    // download never completes (8 min) ask anyway — Refresh UI then downloads.
+    // download hasn't completed within 45 s, ask anyway (Update now then
+    // downloads): on a slow link a longer wait looked like no update at all.
     _updateSeenAt = _updateSeenAt || Date.now();
-    if (!(await updateDownloaded()) && Date.now() - _updateSeenAt < 8 * 60 * 1000) {
+    if (!(await updateDownloaded()) && Date.now() - _updateSeenAt < 45 * 1000) {
       setTimeout(maybeShowUpdateBanner, 15000);
       return;
     }