diff --git a/composer.lock b/composer.lock
index 4b92d74..68a92d3 100644
--- a/composer.lock
+++ b/composer.lock
@@ -8,16 +8,16 @@
     "packages": [
         {
             "name": "composer/ca-bundle",
-            "version": "1.1.2",
+            "version": "1.1.4",
             "source": {
                 "type": "git",
                 "url": "https://github.com/composer/ca-bundle.git",
-                "reference": "46afded9720f40b9dc63542af4e3e43a1177acb0"
+                "reference": "558f321c52faeb4828c03e7dc0cfe39a09e09a2d"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/composer/ca-bundle/zipball/46afded9720f40b9dc63542af4e3e43a1177acb0",
-                "reference": "46afded9720f40b9dc63542af4e3e43a1177acb0",
+                "url": "https://api.github.com/repos/composer/ca-bundle/zipball/558f321c52faeb4828c03e7dc0cfe39a09e09a2d",
+                "reference": "558f321c52faeb4828c03e7dc0cfe39a09e09a2d",
                 "shasum": ""
             },
             "require": {
@@ -60,7 +60,7 @@
                 "ssl",
                 "tls"
             ],
-            "time": "2018-08-08T08:57:40+00:00"
+            "time": "2019-01-28T09:30:10+00:00"
         },
         {
             "name": "guzzlehttp/guzzle",
@@ -180,32 +180,33 @@
         },
         {
             "name": "guzzlehttp/psr7",
-            "version": "1.4.2",
+            "version": "1.5.2",
             "source": {
                 "type": "git",
                 "url": "https://github.com/guzzle/psr7.git",
-                "reference": "f5b8a8512e2b58b0071a7280e39f14f72e05d87c"
+                "reference": "9f83dded91781a01c63574e387eaa769be769115"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/guzzle/psr7/zipball/f5b8a8512e2b58b0071a7280e39f14f72e05d87c",
-                "reference": "f5b8a8512e2b58b0071a7280e39f14f72e05d87c",
+                "url": "https://api.github.com/repos/guzzle/psr7/zipball/9f83dded91781a01c63574e387eaa769be769115",
+                "reference": "9f83dded91781a01c63574e387eaa769be769115",
                 "shasum": ""
             },
             "require": {
                 "php": ">=5.4.0",
-                "psr/http-message": "~1.0"
+                "psr/http-message": "~1.0",
+                "ralouphie/getallheaders": "^2.0.5"
             },
             "provide": {
                 "psr/http-message-implementation": "1.0"
             },
             "require-dev": {
-                "phpunit/phpunit": "~4.0"
+                "phpunit/phpunit": "~4.8.36 || ^5.7.27 || ^6.5.8"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "1.4-dev"
+                    "dev-master": "1.5-dev"
                 }
             },
             "autoload": {
@@ -235,26 +236,27 @@
             "keywords": [
                 "http",
                 "message",
+                "psr-7",
                 "request",
                 "response",
                 "stream",
                 "uri",
                 "url"
             ],
-            "time": "2017-03-20T17:10:46+00:00"
+            "time": "2018-12-04T20:46:45+00:00"
         },
         {
             "name": "mollie/mollie-api-php",
-            "version": "v2.0.13",
+            "version": "v2.8.3",
             "source": {
                 "type": "git",
                 "url": "https://github.com/mollie/mollie-api-php.git",
-                "reference": "8d3b199ddf955f968a274daa1d2a4bdf68b932d1"
+                "reference": "df6e0cea662f3c9603f245816cc2982e8ae49bcf"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/mollie/mollie-api-php/zipball/8d3b199ddf955f968a274daa1d2a4bdf68b932d1",
-                "reference": "8d3b199ddf955f968a274daa1d2a4bdf68b932d1",
+                "url": "https://api.github.com/repos/mollie/mollie-api-php/zipball/df6e0cea662f3c9603f245816cc2982e8ae49bcf",
+                "reference": "df6e0cea662f3c9603f245816cc2982e8ae49bcf",
                 "shasum": ""
             },
             "require": {
@@ -267,7 +269,7 @@
             },
             "require-dev": {
                 "eloquent/liberator": "^2.0",
-                "phpunit/phpunit": "^5.7|^6.5|^7.1"
+                "phpunit/phpunit": "^5.7 || ^6.5 || ^7.1"
             },
             "suggest": {
                 "mollie/oauth2-mollie-php": "Use OAuth to authenticate with the Mollie API. This is needed for some endpoints. Visit https://docs.mollie.com/ for more information."
@@ -308,8 +310,10 @@
                 "inghomepay",
                 "intersolve",
                 "kbc",
+                "klarna",
                 "mistercash",
                 "mollie",
+                "paylater",
                 "payment",
                 "payments",
                 "paypal",
@@ -319,11 +323,12 @@
                 "refunds",
                 "sepa",
                 "service",
+                "sliceit",
                 "sofort",
                 "sofortbanking",
                 "subscriptions"
             ],
-            "time": "2018-08-29T09:05:31+00:00"
+            "time": "2019-04-11T12:19:05+00:00"
         },
         {
             "name": "psr/http-message",
@@ -374,6 +379,46 @@
                 "response"
             ],
             "time": "2016-08-06T14:39:51+00:00"
+        },
+        {
+            "name": "ralouphie/getallheaders",
+            "version": "2.0.5",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/ralouphie/getallheaders.git",
+                "reference": "5601c8a83fbba7ef674a7369456d12f1e0d0eafa"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/ralouphie/getallheaders/zipball/5601c8a83fbba7ef674a7369456d12f1e0d0eafa",
+                "reference": "5601c8a83fbba7ef674a7369456d12f1e0d0eafa",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.3"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "~3.7.0",
+                "satooshi/php-coveralls": ">=1.0"
+            },
+            "type": "library",
+            "autoload": {
+                "files": [
+                    "src/getallheaders.php"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Ralph Khattar",
+                    "email": "ralph.khattar@gmail.com"
+                }
+            ],
+            "description": "A polyfill for getallheaders.",
+            "time": "2016-02-11T07:05:27+00:00"
         }
     ],
     "packages-dev": [],
diff --git a/src/mollieprzelewy24_devapp.php b/src/mollieprzelewy24_devapp.php
new file mode 100644
index 0000000..5e59956
--- /dev/null
+++ b/src/mollieprzelewy24_devapp.php
@@ -0,0 +1,22 @@
+<?php
+
+require_once __DIR__ . '/mollie/mollie.php';
+
+function mollieprzelewy24_devapp_config()
+{
+    $config = mollie_config();
+
+    $config = array_merge($config, array(
+        'FriendlyName' => array(
+            'Type' => 'System',
+            'Value' => 'Mollie Przelewy24'
+        )
+    ));
+
+    return $config;
+}
+
+function mollieprzelewy24_devapp_link($params)
+{
+    return mollie_link($params, \Mollie\Api\Types\PaymentMethod::PRZELEWY24);
+}