diff --git a/404.html b/404.html
index bdf8be0..3965735 100644
--- a/404.html
+++ b/404.html
@@ -70,6 +70,7 @@ <h2>&larr; ホーム</h2>
   <div id="external-links">
       <h2>外部リンク</h2>
       <ul>
+        <li><a href="https://otoneko.jp/" target="_blank">Dev Profile</a></li>
         <li><a href="https://twitter.com/rin_pineapple" target="_blank">Twitter - @rin_pineapple</a></li>
         <li><a href="https://misskey.io/@rin_pineapple" target="_blank">Misskey.io - @rin_pineapple</a></li>
         <li><a href="https://youtube.com/@rin_pineapple" target="_blank">YouTube - @rin_pineapple</a></li>
diff --git a/how-to-start.html b/how-to-start.html
index 77de91f..08b0ed3 100644
--- a/how-to-start.html
+++ b/how-to-start.html
@@ -101,6 +101,7 @@ <h2>&rarr; Botの使い方 - 詳細設定</h2>
   <div id="external-links">
       <h2>外部リンク</h2>
       <ul>
+        <li><a href="https://otoneko.jp/" target="_blank">Dev Profile</a></li>
         <li><a href="https://twitter.com/rin_pineapple" target="_blank">Twitter - @rin_pineapple</a></li>
         <li><a href="https://misskey.io/@rin_pineapple" target="_blank">Misskey.io - @rin_pineapple</a></li>
         <li><a href="https://youtube.com/@rin_pineapple" target="_blank">YouTube - @rin_pineapple</a></li>
diff --git a/how-to-use.html b/how-to-use.html
index e255058..cfb6380 100644
--- a/how-to-use.html
+++ b/how-to-use.html
@@ -88,6 +88,7 @@ <h2>&rarr; 利用規約・プライバシーポリシー</h2>
   <div id="external-links">
       <h2>外部リンク</h2>
       <ul>
+        <li><a href="https://otoneko.jp/" target="_blank">Dev Profile</a></li>
         <li><a href="https://twitter.com/rin_pineapple" target="_blank">Twitter - @rin_pineapple</a></li>
         <li><a href="https://misskey.io/@rin_pineapple" target="_blank">Misskey.io - @rin_pineapple</a></li>
         <li><a href="https://youtube.com/@rin_pineapple" target="_blank">YouTube - @rin_pineapple</a></li>
diff --git a/index.html b/index.html
index 7010e84..a00fdd4 100644
--- a/index.html
+++ b/index.html
@@ -90,6 +90,7 @@ <h2>Botの使い方 - セットアップ &rarr;</h2>
   <div id="external-links">
       <h2>外部リンク</h2>
       <ul>
+        <li><a href="https://otoneko.jp/" target="_blank">Dev Profile</a></li>
         <li><a href="https://twitter.com/rin_pineapple" target="_blank">Twitter - @rin_pineapple</a></li>
         <li><a href="https://misskey.io/@rin_pineapple" target="_blank">Misskey.io - @rin_pineapple</a></li>
         <li><a href="https://youtube.com/@rin_pineapple" target="_blank">YouTube - @rin_pineapple</a></li>
diff --git a/t-pp.html b/t-pp.html
index 50f45fd..5dd89c5 100644
--- a/t-pp.html
+++ b/t-pp.html
@@ -90,6 +90,7 @@ <h2>&larr; Botの使い方 - 詳細設定</h2>
   <div id="external-links">
       <h2>外部リンク</h2>
       <ul>
+        <li><a href="https://otoneko.jp/" target="_blank">Dev Profile</a></li>
         <li><a href="https://twitter.com/rin_pineapple" target="_blank">Twitter - @rin_pineapple</a></li>
         <li><a href="https://misskey.io/@rin_pineapple" target="_blank">Misskey.io - @rin_pineapple</a></li>
         <li><a href="https://youtube.com/@rin_pineapple" target="_blank">YouTube - @rin_pineapple</a></li>