diff --git a/sentinel5dl/__init__.py b/sentinel5dl/__init__.py
index 0c8489a..172b95f 100644
--- a/sentinel5dl/__init__.py
+++ b/sentinel5dl/__init__.py
@@ -28,6 +28,7 @@
 but if not, consider using certifi.where()
 '''
 
+
 def __md5(filename):
     '''Generate the md5 sum of a file