diff --git a/visualdl/server/visualDL b/visualdl/server/visualDL
index 5d132d623a90bab24752ba1a7d7b878609e1990a..146f654ad2a8286ec82656655a558c4f6131cb48 100644
--- a/visualdl/server/visualDL
+++ b/visualdl/server/visualDL
@@ -235,4 +235,4 @@ if __name__ == '__main__':
             os.mkdir(image_dir)
         graph_image_path = vdl_graph.draw_graph(args.model_pb, image_dir)
 
-    app.run(debug=False, host=args.host, port=args.port)
+    app.run(debug=False, host=args.host, port=args.port, threaded=True)