diff --git a/maintenance.md b/maintenance.md
index eafcc8e..c0e8362 100644
--- a/maintenance.md
+++ b/maintenance.md
@@ -6,3 +6,4 @@ Newest entries at the bottom.
 - 2026-09-02: Fire extinguishers checked.
 - 2026-09-04: Gyroscopes recalibrated.
 - 2026-09-04: Escape pod batteries charged.
+- 2026-09-04: Oxygen scrubbers replaced.