Update README.md

Author: dariusrosendahl

README.md

@@ -14,7 +14,7 @@ Use this Boilerplate to get started with your project right away!
 ## Get started
 1. Clone ```git clone https://github.com/CastleCSS/castlecss.git``` or [download](https://github.com/CastleCSS/castlecss-boilerplate/archive/master.zip) CastleCSS Boilerplate.
 2. Set up your project directory and a basic site structure.
-3. From your directory, open a commandline and download the required packages by typing  ```npm install```.
+3. Make sure you have the latest version of [npm](https://www.npmjs.com/) installed. From your directory, open a commandline and download the required packages by typing  ```npm install```.
 4. Run Grunt from your directory by typing ```Grunt``` in the commandline. If you haven't used Grunt before, be sure to check out the [Getting Started guide](http://gruntjs.com/getting-started).
 5. Add some content, do some styling and include functionality.
 6. Run your site locally and see how it all works out!