diff --git a/services/monitoring.nix b/services/monitoring.nix
index c274257..1596596 100644
--- a/services/monitoring.nix
+++ b/services/monitoring.nix
@@ -987,7 +987,7 @@ in
   systemd.timers.disk-usage-collector = {
     wantedBy = [ "timers.target" ];
     timerConfig = {
-      OnCalendar = "*:*:0/60"; # every 60 seconds
+      OnCalendar = "minutely";
       RandomizedDelaySec = "10s";
     };
   };