diff --git a/nglview/widget.py b/nglview/widget.py
index 2b3fd884..58a14ece 100644
--- a/nglview/widget.py
+++ b/nglview/widget.py
@@ -51,7 +51,6 @@
 _INIT_VIEWS = {'color_maker_registry': color.ColormakerRegistry}
 _TRACKED_WIDGETS = {}
 
-
 def _deprecated(msg):
     def wrap_1(func):
         def wrap_2(*args, **kwargs):