diff --git a/ad_interface_tornado.py b/ad_interface_tornado.py
index a3a5590..4afacb6 100644
--- a/ad_interface_tornado.py
+++ b/ad_interface_tornado.py
@@ -83,7 +83,7 @@ def send_cache_data():
 
 def remove_expire_data():
 	now = datetime.datetime.today().strftime("%Y-%m-%d %H:%M:%S")
-	sql = f"select id,gameid,locationid from ad where {now}>=end_time"
+	sql = f"select id,gameid,locationid from ad where '{now}'>=end_time"
 	data = mydb.query(sql)
 	if data:
 		for line in data: