diff --git a/panko/server/cluster.yml b/panko/server/cluster.yml
index 7c442dd..b6e87bb 100644
--- a/panko/server/cluster.yml
+++ b/panko/server/cluster.yml
@@ -1,5 +1,6 @@
 classes:
 - service.panko.server.cluster
+- system.panko.upgrade
 - service.haproxy.proxy.single
 - system.apache.server.site.panko
 - system.haproxy.proxy.listen.openstack.panko