diff --git a/admin_manual/installation/source_installation.rst b/admin_manual/installation/source_installation.rst
index fd8ec4f63..974aca4d0 100644
--- a/admin_manual/installation/source_installation.rst
+++ b/admin_manual/installation/source_installation.rst
@@ -100,6 +100,10 @@ For command line processing (*optional*):
 
 * PHP module pcntl (enables command interruption by pressing ``ctrl-c``)
 
+For command line updater (*optional*):
+
+* PHP module phar (upgrades Nextcloud by running ``sudo -u www-data php /var/www/nextcloud/updater/updater.phar``)
+
 You don’t need the WebDAV module for your Web server (i.e. Apache’s
 ``mod_webdav``), as Nextcloud has a built-in WebDAV server of its own,
 SabreDAV.