diff --git a/config/queue.yml b/config/queue.yml
index 130b0d9bd..3f5615fa8 100644
--- a/config/queue.yml
+++ b/config/queue.yml
@@ -5,7 +5,7 @@ default: &default
   workers:
     - queues: [ "default", "solid_queue_recurring", "backend", "webhooks" ]
       threads: 3
-      processes: <%= ENV.fetch("JOB_CONCURRENCY", Concurrent.physical_processor_count) %>
+      processes: <%= Integer(ENV.fetch("JOB_CONCURRENCY") { Concurrent.physical_processor_count }) %>
       polling_interval: 0.1
 
 development: *default