diff --git a/home/index.html b/home/index.html
index 56d9914..3562515 100644
--- a/home/index.html
+++ b/home/index.html
@@ -135,7 +135,7 @@
 
 <a class="class_content-item scroll" href="../2025-activities/index.html#class16">
 <div class="item fadein">
-<img class="fadein" src="../2025-activities/img/JD2025-10-img2.JPG" alt="../class_content/index.html">
+<img class="fadein" src="../2025-activities/img/JD2025-10-img2.jpg" alt="../class_content/index.html">
 <div class="item-content">
 <p class="item-cat">class content</p>
 <p class="item-text">9月20日 第10回本講義</p>