diff --git a/config/sidekiq/default.yml b/config/sidekiq/default.yml
index a2d9177a2..25957ab42 100644
--- a/config/sidekiq/default.yml
+++ b/config/sidekiq/default.yml
@@ -18,12 +18,11 @@
   - critical
   - high
   - medium
-  - default  
+  - default
+  - mailers
   - action_mailbox_routing
   - low
-
-# you can override concurrency based on environment
-production:
-  :concurrency: <%= ENV.fetch("SIDEKIQ_CONCURRENCY", 10) %>
-staging:
-  :concurrency: <%= ENV.fetch("SIDEKIQ_CONCURRENCY", 10) %>
+  - async_database_migration
+  - active_storage_analysis
+  - active_storage_purge
+  - action_mailbox_incineration
diff --git a/config/sidekiq/quarantine.yml b/config/sidekiq/quarantine.yml
index 91a571eec..7d3fc16a1 100644
--- a/config/sidekiq/quarantine.yml
+++ b/config/sidekiq/quarantine.yml
@@ -16,9 +16,3 @@
 # if there are no jobs in higher ranking queues.
 :queues:
   - scheduled_jobs
-  - mailers
-  - async_database_migration
-  - active_storage_analysis
-  - active_storage_purge
-  - action_mailbox_incineration
-  
\ No newline at end of file