diff --git a/setup.py b/setup.py
index <HASH>..<HASH> 100755
--- a/setup.py
+++ b/setup.py
@@ -4,7 +4,7 @@ import sys
 from setuptools import setup, find_packages
 
 
-install_requires = ['PyMySQL<=0.6.4']
+install_requires = ['PyMySQL<=0.6.6']
 
 PY_VER = sys.version_info
bump supported pymysql version