diff --git a/api/ovkiosk/dav_file.py b/api/ovkiosk/dav_file.py
index 549f352..c5defca 100644
--- a/api/ovkiosk/dav_file.py
+++ b/api/ovkiosk/dav_file.py
@@ -20,7 +20,10 @@ def run_in_executor(f):
     @functools.wraps(f)
     def inner(*args, **kwargs):
         loop = asyncio.get_running_loop()
-        return loop.run_in_executor(None, functools.partial(f, *args, **kwargs))
+        return loop.run_in_executor(
+            None,
+            functools.partial(f, *args, **kwargs),
+        )
 
     return inner