diff --git a/app/src/main/java/com/example/tampopo_client/views/MainActivity.java b/app/src/main/java/com/example/tampopo_client/views/MainActivity.java
index a3499a4..4ae89c3 100644
--- a/app/src/main/java/com/example/tampopo_client/views/MainActivity.java
+++ b/app/src/main/java/com/example/tampopo_client/views/MainActivity.java
@@ -46,7 +46,6 @@
 import com.example.tampopo_client.viewmodels.ChatViewModel;
 import com.example.tampopo_client.viewmodels.NotificationListener;
 
-import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
@@ -364,8 +363,7 @@
                 messageList.addView(container);
 
                 // TODO: CHANGE
-                activitiesLiveData.observeForever(container.getActivityObserver());
-                userViewModel.getIcon().observeForever(container.getIconObserver());
+                activitiesLiveData.observeForever(container.getActivitiesObserver());
 
 //            } else {
 //                // 既に表示されている → コメントだけ更新