diff --git a/app/renderer/css/preference.css b/app/renderer/css/preference.css
index 5fc9add3..8870facd 100644
--- a/app/renderer/css/preference.css
+++ b/app/renderer/css/preference.css
@@ -578,7 +578,6 @@ input.toggle-round:checked + label::after {
   text-align: center;
   color: rgb(255 255 255 / 100%);
   background: rgb(78 191 172 / 100%);
-  border-color: none;
   border: none;
   width: 98%;
   height: 46px;