diff --git a/spacy/util.py b/spacy/util.py
index 49c51b436..d1252e41d 100644
--- a/spacy/util.py
+++ b/spacy/util.py
@@ -13,6 +13,7 @@ import textwrap
 
 from .attrs import TAG, HEAD, DEP, ENT_IOB, ENT_TYPE
 
+
 try:
     basestring
 except NameError: