diff --git a/maintenance.md b/maintenance.md
index 6e9c17f..455efd1 100644
--- a/maintenance.md
+++ b/maintenance.md
@@ -18,3 +18,4 @@ Newest entries at the bottom.
 - 2026-09-10: Escape pod batteries charged.
 - 2026-09-10: Debugging duck accounted for.
 - 2026-09-11: Comms backup tested.
+- 2026-09-14: Water recycling filters replaced.