diff --git a/class_content/content3.html b/class_content/content3.html
index 160e8c4..4699a4a 100644
--- a/class_content/content3.html
+++ b/class_content/content3.html
@@ -41,7 +41,7 @@
         </dl>
     </div>
 </div>
-<div class="class-content-items" id="content-11">
+<div class="class-content-items" id="content-12">
     <p class="class-content-items-text">第１２日目</p>
     <div class="class-content-item-left">
         <dl class="class-content-dl class-content-dl-left">
@@ -60,7 +60,7 @@
         </dl>
     </div>
 </div>
-<div class="class-content-items" id="content-11">
+<div class="class-content-items" id="content-13">
     <p class="class-content-items-text">第１３日目</p>
     <div class="class-content-item-left">
         <dl class="class-content-dl class-content-dl-left">