diff --git a/api/services/credit_pool_service.py b/api/services/credit_pool_service.py
index 2a4b087007..ada7f41ec2 100644
--- a/api/services/credit_pool_service.py
+++ b/api/services/credit_pool_service.py
@@ -1,6 +1,6 @@
 import logging
 
-from sqlalchemy import CursorResult, update
+from sqlalchemy import update
 from sqlalchemy.orm import Session
 
 from configs import dify_config