diff --git a/TODO.md b/TODO.md
index a39c3e4..c7e9db7 100644
--- a/TODO.md
+++ b/TODO.md
@@ -4,6 +4,8 @@
 
 Implement bulleted lists.
 
+Add a purge timeout also for the local timeline.
+
 ## Wishlist
 
 Implement HTTP caches (If-None-Match / ETag).