diff --git a/vdirsyncer/storage/singlefile.py b/vdirsyncer/storage/singlefile.py
index 0db8465..4a781c3 100644
--- a/vdirsyncer/storage/singlefile.py
+++ b/vdirsyncer/storage/singlefile.py
@@ -25,6 +25,7 @@ def _write_after(f):
         return rv
     return inner
 
+
 class SingleFileStorage(Storage):
     '''Save data in single local ``.vcf`` or ``.ics`` file.