diff --git a/marshmallow_jsonapi/flask.py b/marshmallow_jsonapi/flask.py
index b0c59f1..d2a33d0 100644
--- a/marshmallow_jsonapi/flask.py
+++ b/marshmallow_jsonapi/flask.py
@@ -95,7 +95,6 @@ def __init__(self, *args, **kwargs):
 
         super(Schema, self).__init__(*args, **kwargs)
 
-
     def generate_url(self, view_name, **kwargs):
         """Generate URL with any kwargs interpolated."""
         return flask.url_for(view_name, **kwargs) if view_name else None