diff --git a/public/OG-image.png b/public/OG-image.png
deleted file mode 100644
index d542071..0000000
Binary files a/public/OG-image.png and /dev/null differ
diff --git a/public/cfp-OG-image.png b/public/cfp-OG-image.png
new file mode 100644
index 0000000..dd03ed5
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diff --git a/public/favicon.ico b/public/favicon.ico
new file mode 100644
index 0000000..ead62d3
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diff --git a/public/index.html b/public/index.html
index b9cbfeb..09e5e52 100644
--- a/public/index.html
+++ b/public/index.html
@@ -8,10 +8,10 @@
   <meta property="og:title" content="SITCON 2021 學生計算機年會 | Students' Information Technology Conference" />
   <meta property="og:description" content="奠基於今日的科技成果，貢獻明日的資訊未來：SITCON 2021「算盤的後裔」現正徵稿中！" />
   <meta property="og:url" content="https://sitcon.org/2021/" />
-  <meta property="og:image" content="<%= BASE_URL %>OG-image.png" />
+  <meta property="og:image" content="<%= BASE_URL %>cfp-OG-image.png" />
   <meta property="og:type" content="website" type="image/x-icon">
   <meta property="og:site_name" content="SITCON 2021 學生計算機年會 | Students' Information Technology Conference" />
-  <link rel="icon" href="<%= BASE_URL %>sitcon-logo.png">
+  <link rel="icon" href="<%= BASE_URL %>favicon.ico">
   <title>SITCON 學生計算機年會 2021</title>
   <noscript>{{{ %GA_TEMPLATE% }}}</noscript>
 </head>