diff --git a/html/index.html b/html/index.html
index ab38b76a..50099956 100644
--- a/html/index.html
+++ b/html/index.html
@@ -13,6 +13,7 @@
 <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/animate.css/3.7.2/animate.min.css">
 <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/noty/3.2.0-beta/noty.min.css">
 <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/element-ui/2.13.0/theme-chalk/index.css">
+<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/famfamfam-flags/dist/sprite/famfamfam-flags.min.css">
 <link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Noto+Sans+JP|Noto+Sans+KR&display=swap">
 </head>
 <body>
