diff --git a/index.html b/index.html
index 374a3d8..99d0056 100644
--- a/index.html
+++ b/index.html
@@ -6,16 +6,16 @@
     <meta name="theme-color" content="#000000" />
     <meta name="twitter:card" content="summary" />
     <meta name="twitter:creator" content="@syusui-s" />
-    <meta name="twitter:image" content="" />
+    <meta name="twitter:image" content="https://syusui-s.github.io/rabbit/images/rabbit_app_256.png" />
     <meta property="og:type" content="website" />
     <meta property="og:url" content="https://syusui-s.github.io/rabbit/" />
     <meta property="og:title" content="🐰rabbit" />
     <meta property="og:description" content="Nostr Client"  />
-    <meta property="og:image" content="" />
+    <meta property="og:image" content="https://syusui-s.github.io/rabbit/images/rabbit_app_256.png" />
     <meta property="og:locale" content="ja_JP" />
     <link rel="manifest" href="manifest.json" />
     <link rel="shortcut icon" type="image/png" href="./images/rabbit_dark_256.png" />
-    <title>🐰 Rabbit</title>
+    <title>Rabbit</title>
   </head>
   <body>
     <noscript>You need to enable JavaScript to run this app.</noscript>
