Update README.md

Kikobeats · web-flow · commit 09a82b593f4b · 2018-03-02T09:30:18.000+01:00
diff --git a/README.md b/README.md
@@ -21,7 +21,7 @@
 ## Install
 
 ```bash
-$ npm install browserless --save
+$ npm install puppeteer browserless --save
 ```
 
 ## Usage
