diff --git a/Use_Case_Diagram.md b/Use_Case_Diagram.md
index 6c4b860..0e2ef2b 100644
--- a/Use_Case_Diagram.md
+++ b/Use_Case_Diagram.md
@@ -43,6 +43,9 @@ u --> UC3
   UC3_2 --|> UC3
   UC3_3 .> UC3 : extend
   UC3_3_1 .> UC3_3 : extend
+  UC3_4 .> UC3 : extend
+  UC3_5 .> UC3 : extend
+  UC3_6 .> UC3 : extend
 u --> UC4
 u --> UC5
 u --> UC6