diff --git a/README.md b/README.md
index 2d01ab05..180e6f1d 100644
--- a/README.md
+++ b/README.md
@@ -90,7 +90,7 @@ The following command provide basic Apps Script project management.
 clasp
 ```
 
-- [`clasp login [--no-localhost] [--creds <file>] [--status]`](#login)
+- [`clasp login [--no-localhost] [--creds <file>] [--status] [--redirect-port]`](#login)
 - [`clasp logout`](#logout)
 - [`clasp create [--title <title>] [--type <type>] [--rootDir <dir>] [--parentId <id>]`](#create)
 - [`clasp clone <scriptId | scriptURL> [versionNumber] [--rootDir <dir>]`](#clone)