diff --git a/.gitignore b/.gitignore
index f137394..40df76f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
 composer.lock
 composer.phar
 vendor/
+.idea/
diff --git a/README.md b/README.md
index 7ad4a03..f09199b 100644
--- a/README.md
+++ b/README.md
@@ -36,11 +36,13 @@ invit_plivo:
 ## Example
 
 ```php
-$this->get('invit.plivo')->play([
-    'call_uuid' => 'cf5fe5ff-9952-yyyy-xxxx-b75ff490ffff',
-    'urls' => 'https://s3-eu-west-1.amazonaws.com/waitsongbucket/wait.mp3',
-    'loop' => 'true',
-    'mix' => 'false',
-    'legs' => 'both'
-]);
+$this->get(PlivoApi::class)->getCalls()->play(
+    'cf5fe5ff-9952-yyyy-xxxx-b75ff490ffff', 
+    ['https://s3-eu-west-1.amazonaws.com/waitsongbucket/wait.mp3'], 
+    [
+        'loop' => 'true',
+        'mix' => 'false',
+        'legs' => 'both',
+    ]
+);
 ```
diff --git a/composer.json b/composer.json
index dd04704..a673ce1 100644
--- a/composer.json
+++ b/composer.json
@@ -11,10 +11,10 @@
     ],
     "minimum-stability": "stable",
     "require": {
-        "php": "^5.6 || ^7.0",
+        "php": "^7.1",
         "symfony/dependency-injection": "^2.7 || ^3.0",
         "symfony/config": "^2.7 || ^3.0",
-        "plivo/plivo-php": "^1.1.7"
+        "plivo/plivo-php": "^4.0.0"
     },
     "autoload": {
         "psr-0": {
diff --git a/src/Invit/PlivoBundle/Helper/PlivoHelper.php b/src/Invit/PlivoBundle/Helper/PlivoHelper.php
index 79201b7..73a994d 100644
--- a/src/Invit/PlivoBundle/Helper/PlivoHelper.php
+++ b/src/Invit/PlivoBundle/Helper/PlivoHelper.php
@@ -1,32 +1,23 @@
 <?php
+declare(strict_types=1);
 
 namespace Invit\PlivoBundle\Helper;
 
-use Plivo\RestAPI;
+use Invit\PlivoBundle\Service\PlivoApi;
 use Symfony\Component\HttpFoundation\Request;
 
 class PlivoHelper
 {
-    /**
-     * @var string
-     */
     private $authToken;
 
-    /**
-     * @param string $authToken
-     */
-    public function __construct(string $authToken){
+    public function __construct(string $authToken)
+    {
         $this->authToken = $authToken;
     }
 
-    /**
-     * @param Request $request
-     *
-     * @return bool
-     */
     public function validateRequest(Request $request) : bool
     {
-        return RestAPI::validate_signature(
+        return PlivoApi::validate_signature(
             $request->getUri(),
             $request->request->all(),
             $request->headers->get('X-Plivo-Signature'),
diff --git a/src/Invit/PlivoBundle/Resources/config/services.yml b/src/Invit/PlivoBundle/Resources/config/services.yml
index 43bfa95..d500eef 100644
--- a/src/Invit/PlivoBundle/Resources/config/services.yml
+++ b/src/Invit/PlivoBundle/Resources/config/services.yml
@@ -1,14 +1,9 @@
-parameters:
-  invit_plivo.class: Plivo\RestAPI
-
 services:
-  invit.plivo:
-    class: '%invit_plivo.class%'
+  Invit\PlivoBundle\Service\PlivoApi:
     arguments:
       - '%invit_plivo.auth.auth_id%'
       - '%invit_plivo.auth.auth_token%'
 
-  invit.plivo.helper:
-    class: Invit\PlivoBundle\Helper\PlivoHelper
+  Invit\PlivoBundle\Helper\PlivoHelper:
     arguments:
       - '%invit_plivo.auth.auth_token%'
diff --git a/src/Invit/PlivoBundle/Service/PlivoApi.php b/src/Invit/PlivoBundle/Service/PlivoApi.php
new file mode 100644
index 0000000..86eefd4
--- /dev/null
+++ b/src/Invit/PlivoBundle/Service/PlivoApi.php
@@ -0,0 +1,8 @@
+<?php
+declare(strict_types=1);
+
+namespace Invit\PlivoBundle\Service;
+
+use Plivo\RestClient;
+
+class PlivoApi extends RestClient {}