diff --git a/pyqueen/io/sqldb.py b/pyqueen/io/sqldb.py
index cfdcf96..529bd3b 100644
--- a/pyqueen/io/sqldb.py
+++ b/pyqueen/io/sqldb.py
@@ -7,6 +7,8 @@
 class SqlDB:
     def __init__(self, conn_package=None, db_type=None, host=None, username=None, password=None, port=None, db_name=None, jdbc_url=None,
                  keep_conn=False, conn_params=None):
+        if password is None:
+            password = ''
         self.__conn = None
         self.__engine = None
         self.__base_param = {
diff --git a/setup.py b/setup.py
index 2a65cdb..7e2e28c 100644
--- a/setup.py
+++ b/setup.py
@@ -2,7 +2,7 @@
 
 setup(
     name='pyqueen',
-    version='1.1.3',
+    version='1.1.4',
     url='https://github.com/ts7ming/pyqueen.git',
     description='Rule your Data',
     long_description=open("README.md", encoding='utf-8').read(),