diff --git a/_config.yml b/_config.yml
index 8b1acb50..7761c764 100644
--- a/_config.yml
+++ b/_config.yml
@@ -10,10 +10,10 @@ baseurl: "/Pupil"
 google_analytics: UA-119938781-2
 
 disqus_url: "https://pupil.disqus.com"
-kakaotalk_url: "https://open.kakao.com/o/gvNrncsb"
+kakaotalk_url: "https://discord.gg/Stj4b5v"
 
 github:
-  latest_url: "https://github.com/tom5079/Pupil/releases/download/3.3/Pupil-v3.3.apk"
+  latest_url: "https://github.com/tom5079/Pupil/releases/download/4.0/Pupil-v4.0.apk"
   release_url: "https://github.com/tom5079/Pupil/releases/"
   issue_url: "https://github.com/tom5079/Pupil/issues/"
 
@@ -25,7 +25,7 @@ t:
       issue: "Having a problem?"
       or: "or…"
       email: "Send an E-mail"
-      kakaotalk: "Kakaotalk group chat"
+      kakaotalk: "Join Discord server"
   ko:
     header:
       description: "안드로이드 Hitomi.la 뷰어"
@@ -33,4 +33,4 @@ t:
       issue: "문제가 있으세요?"
       or: "또는…"
       email: "이메일 보내기"
-      kakaotalk: "카카오톡 오픈채팅"
+      kakaotalk: "디스코드"
diff --git a/_layouts/default.html b/_layouts/default.html
index ae82b4b2..2f011cf6 100644
--- a/_layouts/default.html
+++ b/_layouts/default.html
@@ -55,7 +55,7 @@
         <a href="{{ site.github.latest_url }}" class="btn">{{ site.t[page.lang].header.download }}</a>
         <a href="{{ site.github.issue_url }}" target="_blank" class="btn">{{ site.t[page.lang].header.issue }}</a> {{ site.t[page.lang].header.or }}
         <a href="mailto:pupil.hentai@gmail.com" class="btn">{{ site.t[page.lang].header.email }}</a>
-        <a href="{{ site.kakaotalk_url }}" class="btn">{{ site.t[page.lang].header.kakaotalk }}</a>
+        <a href="{{ site.discord_url }}" class="btn">{{ site.t[page.lang].header.discord }}</a>
     </header>
 
     <main id="content" class="main-content" role="main">