diff --git a/src/Curl/Curl.php b/src/Curl/Curl.php
index 919c2fb..8c6f093 100644
--- a/src/Curl/Curl.php
+++ b/src/Curl/Curl.php
@@ -666,7 +666,7 @@ public function isServerError()
      */
     public function getResponseHeaders($headerKey = null)
     {
-        $headers = [];
+        $headers = array();
         $headerKey = strtolower($headerKey);
         
         foreach ($this->response_headers as $header) {