diff --git a/fastchat/serve/gradio_web_server_multi.py b/fastchat/serve/gradio_web_server_multi.py
index 59ebdf91e..3c1c74e75 100644
--- a/fastchat/serve/gradio_web_server_multi.py
+++ b/fastchat/serve/gradio_web_server_multi.py
@@ -104,7 +104,7 @@ def build_visualizer():
"""
gr.Markdown(instructions)
- frame = """"""
+ frame = """"""
gr.HTML(frame)