diff --git a/courseA/ArgoUML_Forward/problem2/ArgoUML2_Forward_Delta.html b/courseA/ArgoUML_Forward/problem2/ArgoUML2_Forward_Delta.html
index cb3d335..33cd442 100644
--- a/courseA/ArgoUML_Forward/problem2/ArgoUML2_Forward_Delta.html
+++ b/courseA/ArgoUML_Forward/problem2/ArgoUML2_Forward_Delta.html
@@ -59,7 +59,7 @@
                 <div class = "image"><img src = "./images/images_problem2_delta/ArgoUML_2_delta_05.png" class = "threeQuartersSize"></div>
             </p>
             <p class = "explanation">
-                「オブジェクトの接近過程」ビュー上の「参照元側001」から「参照元側009」までを順番にクリックしてください.<br>
+                「オブジェクトの接近過程」ビュー上の「参照元側001」から「参照元側011」までを順番にクリックしてください.<br>
                 <div class = "image"><img src = "./images/images_problem2_delta/ArgoUML_2_delta_07.png" class = "threeQuartersSize"></div>
                 <div class = "image"><img src = "./images/images_problem2_delta/ArgoUML_2_delta_08.png" class = "threeQuartersSize"></div>
             </p>