diff --git a/src/V8Js.php b/src/V8Js.php
index f2c3b33..49d98c4 100644
--- a/src/V8Js.php
+++ b/src/V8Js.php
@@ -17,7 +17,7 @@ class V8Js
      * @param bool   $report_uncaught_exceptions
      * @param string $snapshot_blob
      */
-    public function __construct($object_name = 'PHP', array $variables = null, array $extensions = null, $report_uncaught_exceptions = true, $snapshot_blob = null)
+    public function __construct($object_name = 'PHP', array $variables = [], array $extensions = [], $report_uncaught_exceptions = true, $snapshot_blob = null)
     {}
 
     /**