diff --git a/lib/que/worker.ex b/lib/que/worker.ex
index 7f6876a..536bdae 100644
--- a/lib/que/worker.ex
+++ b/lib/que/worker.ex
@@ -182,7 +182,7 @@ defmodule Que.Worker do
       end
 
 
-      defoverridable [on_success: 1, on_failure: 2, on_setup: 1, on_teardown: 1]
+      defoverridable [on_success: 1, on_failure: 2, on_setup: 1, on_teardown: 1, concurrency: 0]