diff --git a/composer.json b/composer.json
index 6453a48..146d016 100644
--- a/composer.json
+++ b/composer.json
@@ -16,7 +16,9 @@
         }
     ],
     "require": {
-        "php": ">=5.6"
+        "php": ">=5.6",
+        "ext-curl": "*",
+        "ext-json": "*"
     },
     "require-dev": {
         "phpunit/phpunit": "~4.4",
diff --git a/lib/Client.php b/lib/Client.php
index 4b34b5b..2609a39 100644
--- a/lib/Client.php
+++ b/lib/Client.php
@@ -16,11 +16,11 @@
  *
  * Quickly and easily access any REST or REST-like API.
  *
- * @method Response get($body = null, $query = null, $headers = null)
- * @method Response post($body = null, $query = null, $headers = null)
- * @method Response patch($body = null, $query = null, $headers = null)
- * @method Response put($body = null, $query = null, $headers = null)
- * @method Response delete($body = null, $query = null, $headers = null)
+ * @method Response get($body = null, $query = null, $headers = null, $retryOnLimit = null)
+ * @method Response post($body = null, $query = null, $headers = null, $retryOnLimit = null)
+ * @method Response patch($body = null, $query = null, $headers = null, $retryOnLimit = null)
+ * @method Response put($body = null, $query = null, $headers = null, $retryOnLimit = null)
+ * @method Response delete($body = null, $query = null, $headers = null, $retryOnLimit = null)
  *
  * @method Client version($value)
  * @method Client|Response send()
@@ -123,14 +123,14 @@
  * @method Client subusers()
  * @method Client reputations()
  *
- * Supressions
+ * Suppressions
  * @method Client suppression()
  * @method Client global()
  * @method Client blocks()
  * @method Client bounces()
  * @method Client invalid_emails()
  * @method Client spam_reports()
- * @method Client unsubcribes()
+ * @method Client unsubscribes()
  *
  * Templates
  * @method Client templates()
@@ -432,6 +432,7 @@ private function parseResponse($channel, $content)
      * @param array  $headers         original headers
      *
      * @return Response response object
+     * @throws InvalidRequest
      */
     private function retryRequest(array $responseHeaders, $method, $url, $body, $headers)
     {
@@ -562,6 +563,7 @@ public function _($name = null)
      * @param array  $args parameters passed with the method call
      *
      * @return Client|Response|Response[]|null object
+     * @throws InvalidRequest
      */
     public function __call($name, $args)
     {
diff --git a/lib/Exception/InvalidRequest.php b/lib/Exception/InvalidRequest.php
index 4b25f13..07c8e33 100644
--- a/lib/Exception/InvalidRequest.php
+++ b/lib/Exception/InvalidRequest.php
@@ -7,7 +7,7 @@
  *
  * Thrown when invalid payload was constructed, which could not reach SendGrid server.
  *
- * @package SendGrid\Exceptions
+ * @package SendGrid\Exception
  */
 class InvalidRequest extends \Exception
 {