diff --git a/openhsr_connect/smb_sync.py b/openhsr_connect/smb_sync.py
index cb7b830..edac3de 100644
--- a/openhsr_connect/smb_sync.py
+++ b/openhsr_connect/smb_sync.py
@@ -28,7 +28,7 @@ def connect(self):
         client_name = socket.gethostname()
         connection = SMBConnection(
             username, password, client_name,
-            self.SMB_SERVER_NAME, domain=self.SMB_DOMAIN, use_ntlm_v2=False, is_direct_tcp=True)
+            self.SMB_SERVER_NAME, domain=self.SMB_DOMAIN, is_direct_tcp=True)
         try:
             connect_result = connection.connect(server_ip, self.SMB_SERVER_PORT)
             if connect_result is False: