diff --git a/.gitignore b/.gitignore
index 2c1fc0c..38cdbd7 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,5 @@
 /vendor
 composer.phar
 composer.lock
-.DS_Store
\ No newline at end of file
+.DS_Store
+.idea
\ No newline at end of file
diff --git a/composer.json b/composer.json
index 3977775..a6984d8 100644
--- a/composer.json
+++ b/composer.json
@@ -14,7 +14,8 @@
         "illuminate/support": "~4"
     },
     "require-dev": {
-        "mockery/mockery": "0.9.*"
+        "mockery/mockery": "~0.9",
+        "phpunit/phpunit": "~4.0"
     },
     "autoload": {
         "psr-0": {
diff --git a/tests/CartTest.php b/tests/CartTest.php
index 129e347..9b0ef2f 100644
--- a/tests/CartTest.php
+++ b/tests/CartTest.php
@@ -18,7 +18,7 @@ class CartTest extends PHPUnit_Framework_TestCase {
 	public function setUp()
 	{
 		$session= new SessionMock;
-		$this->events = m::mock('Illuminate\Events\Dispatcher');
+		$this->events = m::mock('Illuminate\Contracts\Events\Dispatcher');
 
 		$this->cart = new Cart($session, $this->events);
 	}
@@ -36,6 +36,14 @@ class CartTest extends PHPUnit_Framework_TestCase {
 		$this->cart->add('293ad', 'Product 1', 1, 9.99, array('size' => 'large'));
 	}
 
+	public function testCartCanAddWithNumericId()
+	{
+		$this->events->shouldReceive('fire')->once()->with('cart.add', m::type('array'));
+		$this->events->shouldReceive('fire')->once()->with('cart.added', m::type('array'));
+
+		$this->cart->add(12345, 'Product 1', 1, 9.99, array('size' => 'large'));
+	}
+
 	public function testCartCanAddArray()
 	{
 		$this->events->shouldReceive('fire')->once()->with('cart.add', m::type('array'));
@@ -136,6 +144,19 @@ class CartTest extends PHPUnit_Framework_TestCase {
 		$this->assertEquals('Product 2', $this->cart->content()->first()->name);
 	}
 
+	public function testCartCanUpdateItemToNumericId()
+	{
+		$this->events->shouldReceive('fire')->once()->with('cart.add', m::type('array'));
+		$this->events->shouldReceive('fire')->once()->with('cart.added', m::type('array'));
+		$this->events->shouldReceive('fire')->once()->with('cart.update', m::type('string'));
+		$this->events->shouldReceive('fire')->once()->with('cart.updated', m::type('string'));
+
+		$this->cart->add('293ad', 'Product 1', 1, 9.99);
+		$this->cart->update('8cbf215baa3b757e910e5305ab981172', array('id' => 12345));
+
+		$this->assertEquals(12345, $this->cart->content()->first()->id);
+	}
+
 	public function testCartCanUpdateOptions()
 	{
 		$this->events->shouldReceive('fire')->once()->with('cart.add', m::type('array'));
@@ -388,4 +409,3 @@ class CartTest extends PHPUnit_Framework_TestCase {
 	}
 
 }
-