diff --git a/QuickPay/API/Request.php b/QuickPay/API/Request.php
index 149c88f..efb485e 100644
--- a/QuickPay/API/Request.php
+++ b/QuickPay/API/Request.php
@@ -164,7 +164,7 @@ protected function execute($request_type, $form = array())
         }
 
         // Store received headers in temporary memory file, remember sent headers
-        $fh_header = fopen('php://memory', 'w+');
+        $fh_header = fopen('php://temp', 'w+');
         curl_setopt($this->client->ch, CURLOPT_WRITEHEADER, $fh_header);
         curl_setopt($this->client->ch, CURLINFO_HEADER_OUT, true);