diff --git a/rwx/grub/__init__.py b/rwx/grub/__init__.py
index 572b13e..aa208c3 100644
--- a/rwx/grub/__init__.py
+++ b/rwx/grub/__init__.py
@@ -1,5 +1,7 @@
 """Wrap GRUB commands."""
 
+from __future__ import annotations
+
 from rwx import cmd, ps
 
 cmd.need("grub-mkimage")
diff --git a/rwx/ps/__init__.py b/rwx/ps/__init__.py
index 81d2320..3bef50d 100644
--- a/rwx/ps/__init__.py
+++ b/rwx/ps/__init__.py
@@ -1,5 +1,7 @@
 """Handle processes."""
 
+from __future__ import annotations
+
 import subprocess
 
 from rwx import Object, txt