diff --git a/examples/web/webui.py b/examples/web/webui.py
index 5a556b050..77e6f2c86 100644
--- a/examples/web/webui.py
+++ b/examples/web/webui.py
@@ -248,12 +248,12 @@ def make_audio(autoplay, stream):
         "--server_name", type=str, default="0.0.0.0", help="server name"
     )
     parser.add_argument("--server_port", type=int, default=8080, help="server port")
-    parser.add_argument("--root_path", type=str, default=None, help="root path")
+    parser.add_argument("--root_path", type=str, help="root path")
     parser.add_argument(
-        "--custom_path", type=str, default=None, help="custom model path"
+        "--custom_path", type=str, help="custom model path"
     )
     parser.add_argument(
-        "--coef", type=str, default=None, help="custom dvae coefficient"
+        "--coef", type=str, help="custom dvae coefficient"
     )
     args = parser.parse_args()