diff --git a/Makefile b/Makefile
index 4d861cf77..59b1ae77d 100644
--- a/Makefile
+++ b/Makefile
@@ -71,7 +71,6 @@ run-celery: ## Run celery, TODO remove purge for staging/prod
 		--pidfile="/tmp/celery.pid" \
 		--loglevel=INFO \
 		--pool=solo
-		--concurrency=20
 
 
 .PHONY: dead-code
diff --git a/manifest.yml b/manifest.yml
index b21727940..589c9b4a0 100644
--- a/manifest.yml
+++ b/manifest.yml
@@ -26,7 +26,7 @@ applications:
       - type: worker
         instances: ((worker_instances))
         memory: ((worker_memory))
-        command: newrelic-admin run-program celery -A run_celery.notify_celery worker --loglevel=INFO --pool=solo --concurrency=20 --prefetch-multiplier=2
+        command: newrelic-admin run-program celery -A run_celery.notify_celery worker --loglevel=INFO --pool=solo --prefetch-multiplier=2
       - type: scheduler
         instances: 1
         memory: ((scheduler_memory))