diff --git a/vn.strategy/strategydemo/demoStrategy.py b/vn.strategy/strategydemo/demoStrategy.py
index a8d654c8..135cf8ca 100644
--- a/vn.strategy/strategydemo/demoStrategy.py
+++ b/vn.strategy/strategydemo/demoStrategy.py
@@ -384,7 +384,7 @@ def main():
     # 让程序连续运行
     sys.exit(app.exec_())
     
-     
+
 if __name__ == '__main__':
     main()