diff --git a/prolefeeder.py b/prolefeeder.py
index fdb43fd..61a1cc7 100644
--- a/prolefeeder.py
+++ b/prolefeeder.py
@@ -20,10 +20,13 @@ Bootstrap(app)
 
 
 class DownloadForm(FlaskForm):
-    start_time = DateTimeField('Start time', validators=[InputRequired()],
+    start_time = DateTimeField('Start time',
+                               validators=[InputRequired()],
                                format='%Y-%m-%d %H:%M')
-    length = IntegerField('Length', validators=[InputRequired(),
-                                                NumberRange(min=1, max=app.config['MAX_LENGTH'])])
+    length = IntegerField('Length',
+                          validators=[
+                              InputRequired(),
+                              NumberRange(min=1, max=app.config['MAX_LENGTH'])])
     submit = SubmitField('Download')