diff --git a/README.md b/README.md
index 864a5d0..287a8fd 100644
--- a/README.md
+++ b/README.md
@@ -18,6 +18,10 @@ Using [NextCloud](https://nextcloud.com/)
 
 ## command
 
+``` bash
+su -s /bin/bash www-data -c "php occ upgrade;"
+```
+
 ## maintenance mode
 
 ``` bash