diff --git a/index.html b/index.html
index 99d0056..130ecd9 100644
--- a/index.html
+++ b/index.html
@@ -6,12 +6,12 @@
     <meta name="theme-color" content="#000000" />
     <meta name="twitter:card" content="summary" />
     <meta name="twitter:creator" content="@syusui-s" />
-    <meta name="twitter:image" content="https://syusui-s.github.io/rabbit/images/rabbit_app_256.png" />
+    <meta name="twitter:image" content="https://syusui-s.github.io/rabbit/images/rabbit_app_1280.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="https://syusui-s.github.io/rabbit/images/rabbit_app_256.png" />
+    <meta property="og:image" content="https://syusui-s.github.io/rabbit/images/rabbit_app_1280.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" />
diff --git a/public/images/rabbit_app_1280.png b/public/images/rabbit_app_1280.png
new file mode 100644
index 0000000..c8225dd
Binary files /dev/null and b/public/images/rabbit_app_1280.png differ
diff --git a/public/manifest.json b/public/manifest.json
index d189b79..7e69bd3 100644
--- a/public/manifest.json
+++ b/public/manifest.json
@@ -10,5 +10,9 @@
     "src": "images/rabbit_app_256.png",
     "sizes": "256x256",
     "type": "image/png"
+  }, {
+    "src": "images/rabbit_app_1280.png",
+    "sizes": "1280x1280",
+    "type": "image/png"
   }]
 }
diff --git a/src/core/parseTextNote.ts b/src/core/parseTextNote.ts
index c520638..0a9c127 100644
--- a/src/core/parseTextNote.ts
+++ b/src/core/parseTextNote.ts
@@ -58,7 +58,7 @@ export type MentionedUser = {
 };
 
 const tagRefRegex = /(?:#\[(?<idx>\d+)\])/g;
-const hashTagRegex = /#(?<hashtag>[^[-^`:-@!-/{-~\d\s][^[-^`:-@!-/{-~\s]+)/g;
+const hashTagRegex = /#(?<hashtag>[\p{Letter}\p{Number}_]+)/gu;
 // raw NIP-19 codes, NIP-21 links (NIP-27)
 // nrelay and naddr is not supported by nostr-tools
 const mentionRegex = /(?:nostr:)?(?<mention>(npub|note|nprofile|nevent)1[ac-hj-np-z02-9]+)/gi;
diff --git a/src/pages/Hello.tsx b/src/pages/Hello.tsx
index 15a2472..4f4f4b5 100644
--- a/src/pages/Hello.tsx
+++ b/src/pages/Hello.tsx
@@ -48,7 +48,7 @@ const Hello: Component = () => {
   return (
     <div class="mx-auto flex max-w-[640px] flex-col items-center p-4 text-stone-600">
       <div class="flex flex-col items-center gap-4 rounded bg-white p-4">
-        <img src="./images/rabbit_light_256.png" width="96" alt="logo" height="96" />
+        <img src="./images/rabbit_256.png" width="96" alt="logo" height="96" />
         <h1 class="text-5xl font-black text-rose-300">Rabbit</h1>
         <div>Rabbit is a Web client for Nostr.</div>
         <p class="text-center">
diff --git a/src/pages/Home.tsx b/src/pages/Home.tsx
index fc352b2..341cf36 100644
--- a/src/pages/Home.tsx
+++ b/src/pages/Home.tsx
@@ -122,6 +122,9 @@ const Home: Component = () => {
         since: epoch() - 12 * 60 * 60,
       },
     ],
+    clientEventFilter: (ev) => {
+      return /[\p{scx=Hiragana}\p{scx=Katakana}\p{sc=Han}]/u.test(ev.content);
+    },
   }));
 
   onMount(() => {