diff --git a/db.py b/db.py
index e538135..b8cb8a0 100644
--- a/db.py
+++ b/db.py
@@ -11,7 +11,8 @@ def get_latest_speed():
     )
     all_servers=cursor.fetchall()
     server_latest_speed_dic={}
-    for server in all_servers[0]:
+    for server_tup in all_servers:
+        server=server_tup[0]
         cursor = mysql_db.execute_sql(
             "select speed from vps_download_speed where server='{server}'order by id DESC limit 1".format(server=server)
         )