diff --git a/README.md b/README.md
index 5c9e09d..fff962a 100644
--- a/README.md
+++ b/README.md
@@ -29,6 +29,15 @@ Fully automated luxury Nextcloud via docker-swarm.
 
 `abra app YOURAPPDOMAIN occ user:list`
 
+If you need to provide additional arguments or options, you'll need to quote
+them, e.g.
+
+`abra app YOURAPPDOMAIN occ user:list --help`
+
+## Upgrading Nextcloud apps
+
+`abra app YOURAPPDOMAIN occ "app:update --all"`
+
 [nextcloud-docker]: https://hub.docker.com/_/nextcloud/
 [`abra`]: https://git.autonomic.zone/autonomic-cooperative/abra
 [`coop-cloud/traefik`]: https://git.autonomic.zone/coop-cloud/traefik