diff --git a/js/app.sync.js b/js/app.sync.js
index 6a004b3..f309906 100644
--- a/js/app.sync.js
+++ b/js/app.sync.js
@@ -61,7 +61,8 @@ Bridge.onSyncQr = function (size, bits) {
             if (bits.charCodeAt(r * size + c) === 49) d += 'M' + c + ' ' + r + 'h1v1h-1z';
     box.innerHTML =
         '<svg viewBox="0 0 ' + size + ' ' + size + '" width="240" height="240" ' +
-        'shape-rendering="crispEdges" style="background:#fff;display:block;border-radius:6px">' +
+        'shape-rendering="crispEdges" style="width:240px;height:240px;max-width:none;flex:none;' +
+        'background:#fff;display:block;border-radius:6px">' +
         '<path d="' + d + '" fill="#000"/></svg>' +
         '<p style="font-size:11px;color:var(--text-faint);margin:6px 0 0">' +
         'Scan it with the phone camera and copy the text, then in the app: ' +