diff --git a/jupyterhub/files/hub/z2jh.py b/jupyterhub/files/hub/z2jh.py
index 3735169b2b..f4d7be699e 100644
--- a/jupyterhub/files/hub/z2jh.py
+++ b/jupyterhub/files/hub/z2jh.py
@@ -3,6 +3,7 @@
 
 Methods here can be imported by extraConfig in values.yaml
 """
+
 import os
 from collections.abc import Mapping
 from functools import lru_cache