diff --git a/sample/bootstrap.php b/sample/bootstrap.php
index 5f68584..26f1ef9 100644
--- a/sample/bootstrap.php
+++ b/sample/bootstrap.php
@@ -88,6 +88,7 @@ function getApiContext($clientId, $clientSecret)
             'log.FileName' => '../PayPal.log',
             'log.LogLevel' => 'DEBUG', // PLEASE USE `INFO` LEVEL FOR LOGGING IN LIVE ENVIRONMENTS
             'cache.enabled' => true,
+            //'cache.FileName' => '/PaypalCache' // for determining paypal cache directory
             // 'http.CURLOPT_CONNECTTIMEOUT' => 30
             // 'http.headers.PayPal-Partner-Attribution-Id' => '123123123'
             //'log.AdapterFactory' => '\PayPal\Log\DefaultLogFactory' // Factory class implementing \PayPal\Log\PayPalLogFactory