diff --git a/guide/src/basic-usage.md b/guide/src/basic-usage.md
index 173ed288..a0c19c9b 100644
--- a/guide/src/basic-usage.md
+++ b/guide/src/basic-usage.md
@@ -163,6 +163,7 @@ Our corresponding `index.html`:
 And finally:
 
 ```shell
+$ npm install
 $ npm run serve
 ```