diff --git a/manifest-delivery-base.yml b/manifest-delivery-base.yml
index 8891f6c38..9f4527355 100644
--- a/manifest-delivery-base.yml
+++ b/manifest-delivery-base.yml
@@ -63,7 +63,7 @@ applications:
       NOTIFY_APP_NAME: delivery-worker-research
 
   - name: notify-delivery-worker-sender
-    command: scripts/run_multi_worker_app_paas.sh celery multi start 4 -c 10 -A run_celery.notify_celery --loglevel=INFO -Q send-sms-tasks,send-email-tasks
+    command: scripts/run_multi_worker_app_paas.sh celery multi start 3 -c 10 -A run_celery.notify_celery --loglevel=INFO -Q send-sms-tasks,send-email-tasks
     memory: 2G
     env:
       SQLALCHEMY_POOL_SIZE: 1
@@ -99,4 +99,4 @@ applications:
   - name: notify-delivery-worker-service-callbacks
     command: scripts/run_app_paas.sh celery -A run_celery.notify_celery worker --loglevel=INFO --concurrency=11 -Q service-callbacks
     env:
-      NOTIFY_APP_NAME: delivery-worker-service-callbacks
\ No newline at end of file
+      NOTIFY_APP_NAME: delivery-worker-service-callbacks