diff --git a/build/lib/sqlor/sor.py b/build/lib/sqlor/sor.py
index 5c12db0..c486ce8 100644
--- a/build/lib/sqlor/sor.py
+++ b/build/lib/sqlor/sor.py
@@ -1,7 +1,6 @@
 from traceback import print_exc
 import os  
 import decimal
-from asyncio import coroutine
 os.environ['NLS_LANG'] = 'SIMPLIFIED CHINESE_CHINA.UTF8'
 import sys
 from datetime import datetime, date