diff --git a/DBPDO.php b/DBPDO.php
index 35d179c..990be3e 100644
--- a/DBPDO.php
+++ b/DBPDO.php
@@ -2,13 +2,24 @@
 
 namespace A1phanumeric;
 
+use \PDO;
+use \PDOException;
+
 class DBPDO {
 
 	public $pdo;
 	private $error;
+	private $dbname;
+	private $dbhost;
+	private $dbuser;
+	private $dbpass;
 
 
-	function __construct() {
+	function __construct($dbhost = '', $dbname = '', $dbuser = '', $dbpass= '') {
+		$this->dbhost = $dbhost;
+		$this->dbname = $dbname;
+		$this->dbuser = $dbuser;
+		$this->dbpass = $dbpass;
 		$this->connect();
 	}
 
@@ -21,9 +32,9 @@ function prep_query($query){
 	function connect(){
 		if(!$this->pdo){
 
-			$dsn      = 'mysql:dbname=' . DATABASE_NAME . ';host=' . DATABASE_HOST.';charset=utf8';
-			$user     = DATABASE_USER;
-			$password = DATABASE_PASS;
+			$dsn      = 'mysql:dbname=' . $this->dbname . ';host=' . $this->dbhost . ';charset=utf8';
+			$user     = $this->dbuser;
+			$password = $this->dbpass;
 
 			try {
 				$this->pdo = new PDO($dsn, $user, $password, array(PDO::ATTR_PERSISTENT => true));
diff --git a/readme.md b/readme.md
index b61ad31..8bd7fb2 100644
--- a/readme.md
+++ b/readme.md
@@ -12,8 +12,20 @@ PHP MySQL Class
 
 This is a simple to use MySQL class that easily bolts on to any existing PHP application, streamlining your MySQL interactions.
 
+Setup v2.0+
+-----
+
+Include the class using composer as below:
+
+`composer require a1phanumeric/php-mysql-class`
+
+To use in your project, use the following:
+
+`use A1phanumeric\DBPDO;`
+
+`$DB = new DBPDO('db_name', 'db_host', 'db_user', 'db_pass');`
 
-Setup
+###Setup Before v2.0
 -----
 
 Firstly, define four constants for the host, database name, username and password: