diff --git a/src/textual/cli/previews/keys.py b/src/textual/cli/previews/keys.py
index 91ac5575a..933fac807 100644
--- a/src/textual/cli/previews/keys.py
+++ b/src/textual/cli/previews/keys.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from rich.panel import Panel
 
 from rich.text import Text