diff --git a/src/ui.rs b/src/ui.rs
index 4ea1f097a..8c4f4b3d9 100644
--- a/src/ui.rs
+++ b/src/ui.rs
@@ -617,7 +617,7 @@ impl UI {
     }
 
     fn generate_2fa_img_src(&self, data: String) -> String {
-        let v = qrcode_generator::to_png_to_vec(data, qrcode_generator::QrCodeEcc::Low, 64)
+        let v = qrcode_generator::to_png_to_vec(data, qrcode_generator::QrCodeEcc::Low, 128)
             .unwrap_or_default();
         let s = hbb_common::sodiumoxide::base64::encode(
             v,
diff --git a/src/ui/index.tis b/src/ui/index.tis
index 7b6e15c60..05569ec51 100644
--- a/src/ui/index.tis
+++ b/src/ui/index.tis
@@ -1012,7 +1012,7 @@ class PasswordArea: Reactor.Component {
                     return translate('wrong-2fa-code');
                 }
                 me.update();
-            }, 320);
+            }, 400);
         }
     }
 }