diff --git a/ivatar/utils.py b/ivatar/utils.py
index 8989a09..445d2c2 100644
--- a/ivatar/utils.py
+++ b/ivatar/utils.py
@@ -1,10 +1,10 @@
 import random
 import string
 
+
 def random_string(len=10):
     '''
     Return some random string with default length 10
     '''
     return ''.join(random.SystemRandom().choice(
-        string.ascii_lowercase +
-        string.digits) for _ in range(10))
+        string.ascii_lowercase + string.digits) for _ in range(10))