diff --git a/src/views/ShopPayView.vue b/src/views/ShopPayView.vue
index 8a22d6c..7a62d4a 100644
--- a/src/views/ShopPayView.vue
+++ b/src/views/ShopPayView.vue
@@ -77,7 +77,7 @@ export default {
     scan() {
       this.scanner = new Html5QrcodeScanner(
         "reader",
-        { fps: 10, qrbox: { width: 250, height: 250 } },
+        { fps: 10, qrbox: { width: 400, height: 400 } },
         /* verbose= */ false);
       this.scanner.render(this.onScanSuccess);
     },