diff --git a/samples/transaction/start.php b/samples/transaction/start.php
index 7c9198ea..426c0c9f 100644
--- a/samples/transaction/start.php
+++ b/samples/transaction/start.php
@@ -28,14 +28,15 @@
         // optional
         'exchangeUrl' => dirname(Paynl\Helper::getBaseUrl()) . '/exchange.php',
         'paymentMethod' => 10,
-        'currency' => 'USD',
-        'bank' => 1,
-        'description' => 'demo betaling',
-        'testmode' => 1,
+        'currency' => 'EUR',
+        'expireDate' => new DateTime('2016-04-01'),
+//        'bank' => 1,
+        'description' => '123456',
+        'testmode' => 0,
         'extra1' => 'ext1',
         'extra2' => 'ext2',
         'extra3' => 'ext3',
-        'ipaddress' => '127.0.0.1',
+        'ipaddress' => \Paynl\Helper::getIp(),
         'invoiceDate' => new DateTime('now'),
         'deliveryDate' => new DateTime('2016-06-06'), // in case of tickets for an event, use the event date here
         'products' => array(
diff --git a/src/Api/Transaction/Start.php b/src/Api/Transaction/Start.php
index c326a3e6..cc5ceeba 100644
--- a/src/Api/Transaction/Start.php
+++ b/src/Api/Transaction/Start.php
@@ -124,6 +124,20 @@ class Start extends Transaction
      */
     private $_products = array();
 
+    /**
+     * @var \DateTime
+     */
+    private $_expireDate;
+
+    /**
+     * @param \DateTime $expireDate
+     */
+    public function setExpireDate(\DateTime $expireDate)
+    {
+        $this->_expireDate = $expireDate;
+    }
+
+
     /**
      * @param \DateTime $invoiceDate
      */
@@ -378,6 +392,10 @@ protected function getData()
             $data['transaction']['currency'] = $this->_currency;
         }
 
+        if(isset($this->_expireDate)){
+            $data['transaction']['expireDate'] = $this->_expireDate->format('d-m-Y H:i:s');
+        }
+
         if (!empty($this->_paymentOptionSubId)) {
             $data['paymentOptionSubId'] = $this->_paymentOptionSubId;
         }
diff --git a/src/Transaction.php b/src/Transaction.php
index 13ebb5b4..92d4fc53 100644
--- a/src/Transaction.php
+++ b/src/Transaction.php
@@ -47,6 +47,9 @@ public static function start($options = array())
         if (isset($options['currency'])) {
             $api->setCurrency($options['currency']);
         }
+        if(isset($options['expireDate'])){
+            $api->setExpireDate($options['expireDate']);
+        }
 
         if (isset($options['returnUrl'])) {
             $api->setFinishUrl($options['returnUrl']);
diff --git a/tests/ConfigTest.php b/tests/ConfigTest.php
index c617018a..21f4b8ce 100644
--- a/tests/ConfigTest.php
+++ b/tests/ConfigTest.php
@@ -26,16 +26,25 @@ public function testServiceId()
 
     public function testApiVersion()
     {
-        \Paynl\Config::setServiceId('api-version');
+        \Paynl\Config::setApiVersion(4);
 
-        $this->assertEquals('api-version', \Paynl\Config::getServiceId());
+        $this->assertEquals(4, \Paynl\Config::getApiVersion());
     }
 
     public function testApiUrl()
     {
+        \Paynl\Config::setApiVersion(4);
+
         $this->assertEquals(
-            'https://rest-api.pay.nl/v5/transaction/json',
-            \Paynl\Config::getApiUrl('transaction', 5)
+            'https://rest-api.pay.nl/v4/transaction/json',
+            \Paynl\Config::getApiUrl('transaction')
         );
     }
+    public function testGetCurlDefault(){
+        $this->assertInstanceOf('\Curl\Curl', \Paynl\Config::getCurl());
+    }
+    public function testGetCurlCustom(){
+        \Paynl\Config::setCurl(new DateTime());
+        $this->assertInstanceOf('\DateTime', \Paynl\Config::getCurl());
+    }
 }