diff --git a/ctabus/internal/disk_cache.py b/ctabus/internal/disk_cache.py
index 63ffea9..3612e14 100644
--- a/ctabus/internal/disk_cache.py
+++ b/ctabus/internal/disk_cache.py
@@ -1,7 +1,7 @@
+import atexit
 import lzma
 import os
 import pickle
-import atexit
 
 from ctabus.internal.config import cache_dir