diff --git a/app/core/worker.py b/app/core/worker.py
index 258cc96..2525f2b 100644
--- a/app/core/worker.py
+++ b/app/core/worker.py
@@ -184,6 +184,6 @@ class WorkerSettings:
         # Outbox processor — every 5 seconds, guarded by distributed lock
         cron(
             _wrap_cron_with_lock("process_outbox", process_outbox_job, ttl_seconds=30),
-            second="*/5",
+            second={0, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55},
         ),
     ]