diff --git a/altair/vegalite/v5/api.py b/altair/vegalite/v5/api.py
index a0669b25e..a6d7aa0f5 100644
--- a/altair/vegalite/v5/api.py
+++ b/altair/vegalite/v5/api.py
@@ -1069,6 +1069,7 @@ def to_url(self, fullscreen: bool = False):
             If True, editor will open chart in fullscreen mode. Default False
         """
         from ...utils._importers import import_vl_convert
+
         vlc = import_vl_convert()
         if _using_vegafusion():
             return vlc.vega_to_url(self.to_dict(format="vega"), fullscreen=fullscreen)