diff --git a/dcor_control/inspect/common.py b/dcor_control/inspect/common.py
index a81c473..2de6a25 100644
--- a/dcor_control/inspect/common.py
+++ b/dcor_control/inspect/common.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 import collections.abc
 import pathlib
 import grp