diff --git a/img/sponsor/s_dotinstall.png b/img/sponsor/s_dotinstall.png
new file mode 100644
index 0000000..83e3f5f
Binary files /dev/null and b/img/sponsor/s_dotinstall.png differ
diff --git a/index.html b/index.html
index a09e56b..b9638a8 100644
--- a/index.html
+++ b/index.html
@@ -179,6 +179,12 @@ <h3 class="text-center">Silver</h3>
         <img src="./img/sponsor/s_sakurainternet.png" class="w-100" alt="さくらインターネット株式会社 様ロゴ">
       </a>
     </div>
+    
+    <div class="col-md-6">
+      <a href="https://dotinstall.com/" target="_blank">
+        <img src="./img/sponsor/s_dotinstall.png" class="w-100" alt="株式会社ドットインストール 様ロゴ">
+      </a>
+    </div>
 
   </div>