diff --git a/js/README.md b/js/README.md
index 41252bc91..5ed26e0cf 100644
--- a/js/README.md
+++ b/js/README.md
@@ -7,6 +7,6 @@ JavaScript APIs and UIs for Parity.
 0. Install [Node](https://nodejs.org/) if not already available
 0. Change to the `js` directory inside `parity/`
 0. Install the npm modules via `npm install`
-0. Parity should be run with `parity --signer-no-validation [...options]` (where `options` can be `--chain testnet`)
+0. Parity should be run with `parity --ui-no-validation [...options]` (where `options` can be `--chain testnet`)
 0. Start the development environment via `npm start`
 0. Connect to the [UI](http://localhost:3000)