horizon sphinx doc
diff --git a/metadata/service/server/single.yml b/metadata/service/server/single.yml
index b15c63e..4ec6fc8 100644
--- a/metadata/service/server/single.yml
+++ b/metadata/service/server/single.yml
@@ -1,5 +1,7 @@
 applications:
 - horizon
+classes:
+- service.horizon.support
 parameters:
   _param:
     horizon_version: liberty