diff --git a/docs/setup/install.md b/docs/setup/install.md
index f7f10a3d..234423d5 100644
--- a/docs/setup/install.md
+++ b/docs/setup/install.md
@@ -39,8 +39,9 @@ $ cd Cachet
 ## Install requirements
 
 You need to have a modern version of node.js installed (with NPM) - see https://github.com/nodesource/distributions
+
 ```bash
-apt-get install nodejs
+apt-get install nodejs npm
 npm install -g bower
 npm install -g gulp
 curl -sS https://getcomposer.org/installer | php  #always be careful when piping from the internet!
diff --git a/package.json b/package.json
index f56cfdbe..6ddb0822 100644
--- a/package.json
+++ b/package.json
@@ -4,6 +4,7 @@
         "del": "~1.1.1",
         "gulp": "~3.8.8",
         "laravel-elixir": "~0.9.1",
-        "laravel-elixir-jshint": "~0.1.6"
+        "laravel-elixir-jshint": "~0.1.6",
+        "array-union": "~1.0.1"
     }
 }