diff --git a/src/library/curl.php b/src/library/curl.php
index c880268..2f2a765 100644
--- a/src/library/curl.php
+++ b/src/library/curl.php
@@ -20,7 +20,7 @@ class Curl
     if (!empty($post))
     {
       curl_setopt($this->_connection, CURLOPT_POST, true);
-      curl_setopt($this->_connection, CURLOPT_POSTFIELDS, $post);
+      curl_setopt($this->_connection, CURLOPT_POSTFIELDS, json_encode($post));
     }
 
     if ($header) {