diff --git a/Quick-Installer-usage.md b/Quick-Installer-usage.md
index bd8df9e..2472caa 100644
--- a/Quick-Installer-usage.md
+++ b/Quick-Installer-usage.md
@@ -32,5 +32,8 @@ curl -sL https://install.raspap.com | bash -s -- --repo foo/bar --branch my-feat
 #### -h, --help
 Outputs these usage notes and exits.
 
+#### -u, --upgrade
+Upgrades an existing installation to the latest release version.
+
 #### -v, --version
 Queries the Github API, outputs the latest RaspAP release version and exits.
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