diff --git a/update_db.py b/update_db.py
index 6da1bb4..9df9978 100644
--- a/update_db.py
+++ b/update_db.py
@@ -56,9 +56,9 @@ class CommentResult (TypedDict):
 
 def main (
 ) -> None:
-    conn = mysql.connector.connect (host     = os.environ['MYSQL_HOST'],
-                                    user     = os.environ['MYSQL_USER'],
-                                    password = os.environ['MYSQL_PASS'])
+    conn = mysql.connector.connect (user        = os.environ['MYSQL_USER'],
+                                    password    = os.environ['MYSQL_PASS'],
+                                    database    = 'nizika_nico')
 
     now = datetime.now ()