diff --git a/zfs-backup.py b/zfs-backup.py
index 313ee97..37a11b5 100755
--- a/zfs-backup.py
+++ b/zfs-backup.py
@@ -34,6 +34,7 @@ def main():
 # TODO --skip-post-backup-scrub
 # TODO print time estimation while scrub is in progress
 # TODO logging
+# TODO type hints
 
 
 class Manager: