diff --git a/waveorder/visuals/jupyter_visuals.py b/waveorder/visuals/jupyter_visuals.py
index bc41d7a..f3d9db2 100644
--- a/waveorder/visuals/jupyter_visuals.py
+++ b/waveorder/visuals/jupyter_visuals.py
@@ -172,7 +172,8 @@ def image_stack_viewer_fast(
         else:
             raise ValueError('origin can only be either "upper" or "lower"')
 
-    im_wgt = Image(        value=im_dict[0],
+    im_wgt = Image(        
+        value=im_dict[0],
         layout=Layout(height=str(size[0]) + "px", width=str(size[1]) + "px"),
     )