diff --git a/web_view.py b/web_view.py
index a1c7d52..edf57b6 100755
--- a/web_view.py
+++ b/web_view.py
@@ -355,8 +355,9 @@ def api_valid_hit() -> werkzeug.wrappers.response.Response:
 
 
 @app.route("/favicon.ico")
-def favicon() -> None:
-    flask.abort(404)
+def favicon() -> Response:
+    """No favicon."""
+    return flask.Response(status=404)
 
 
 if __name__ == "__main__":