diff --git a/pyuhoo/util.py b/pyuhoo/util.py
index 36db5d4..d970c5c 100644
--- a/pyuhoo/util.py
+++ b/pyuhoo/util.py
@@ -1,4 +1,5 @@
 """Define various utility functions."""
+
 import json
 from codecs import decode, encode
 from hashlib import md5, sha256