diff --git a/src/Connection/HttpResponse.php b/src/Connection/HttpResponse.php
index a16120b..fad35ab 100644
--- a/src/Connection/HttpResponse.php
+++ b/src/Connection/HttpResponse.php
@@ -52,7 +52,7 @@ class HttpResponse
             while ($index > 0) {
                 $chunk [] = substr($this->response, $this->offset, $index);
                 $this->offset += $index;
-                $index = hexdec($this->getLine());
+                $index = (int)hexdec($this->getLine());
             }
 
             $this->data = implode("", $chunk);