ImageMagick is a required dependency

Author: jremsik

README.md

@@ -7,7 +7,13 @@ This repository contains the [express middleware](https://expressjs.com/en/guide
 Check out [our website](http://avatars.adorable.io/) for more info on (and an interactive demo of) what this service does.
 
 ## How do I use it?
-First, you'll need to install the package:
+First, you'll need to install the dependencies:
+
+```bash
+brew install imagemagick
+```
+
+Next, you'll need the `adorable-avatars` package:
 
 ```bash
 npm install adorable-avatars --save