diff --git a/index.html b/index.html
index 31b5f3c790..b0ec1fdce5 100644
--- a/index.html
+++ b/index.html
@@ -13,7 +13,7 @@
     <style>
       .loader {
         position: fixed; top: calc(50% - 25px); left: calc(50% - 25px);
-        width: 50px; aspect-ratio: 1; animation: ll 1s infinite linear;
+        width: 50px; aspect-ratio: 1; box-sizing: content-box; animation: ll 1s infinite linear;
         border-radius: 50%; border: 8px solid lightgray; border-right-color: black;
       }
       @keyframes ll {to{transform: rotate(1turn)}}