diff --git a/maintenance.md b/maintenance.md
index c0e8362..b0f840b 100644
--- a/maintenance.md
+++ b/maintenance.md
@@ -7,3 +7,4 @@ Newest entries at the bottom.
 - 2026-09-04: Gyroscopes recalibrated.
 - 2026-09-04: Escape pod batteries charged.
 - 2026-09-04: Oxygen scrubbers replaced.
+- 2026-09-05: Water recycling filters replaced.