diff --git a/multi_user/preferences.py b/multi_user/preferences.py
index 21a71dd..4777570 100644
--- a/multi_user/preferences.py
+++ b/multi_user/preferences.py
@@ -45,33 +45,26 @@ DEFAULT_PRESETS = {
         "server_password": ""
     },
     "NTHU Session 1" : {
-        "server_name": "NTHU Session 1",
-        "ip": "192.168.17.253",
+        "server_name": "Session 1",
+        "ip": "31.38.153.178",
         "port": 5555,
         "admin_password": "",
         "server_password": ""
     },
         "NTHU Session 2" : {
-        "server_name": "NTHU Session 2",
-        "ip": "192.168.17.253",
+        "server_name": "Session 2",
+        "ip": "31.38.153.178",
         "port": 5655,
         "admin_password": "",
         "server_password": ""
     },
         "NTHU Session 3" : {
-        "server_name": "NTHU Session 3",
-        "ip": "192.168.17.253",
+        "server_name": "Session 3",
+        "ip": "31.38.153.178",
         "port": 5755,
         "admin_password": "",
         "server_password": ""
-    },
-        "NTHU Session 4" : {
-        "server_name": "NTHU Session 4",
-        "ip": "192.168.17.253",
-        "port": 5855,
-        "admin_password": "",
-        "server_password": ""
-    },
+    }
 }
 
 def randomColor():