diff --git a/horizon/server/single.yml b/horizon/server/single.yml
index 5a83b2a..c20de5a 100644
--- a/horizon/server/single.yml
+++ b/horizon/server/single.yml
@@ -1,6 +1,5 @@
 classes:
 - service.horizon.server.single
-- system.horizon.server.plugin.theme
 parameters:
   _param:
     horizon_site_branding: OpenStack Dashboard