diff --git a/roles/magnum/vars/main.yml b/roles/magnum/vars/main.yml
index e7a092c..8bc7fa3 100644
--- a/roles/magnum/vars/main.yml
+++ b/roles/magnum/vars/main.yml
@@ -20,6 +20,8 @@
     magnum:
       DEFAULT:
         log_config_append: null
+      api:
+        workers: 4
       barbican_client:
         endpoint_type: internalURL
         region_name: "{{ openstack_helm_endpoints_barbican_region_name }}"