diff --git a/MangoPay/Libraries/RestTool.php b/MangoPay/Libraries/RestTool.php
index a6c6263a..0f91a47b 100644
--- a/MangoPay/Libraries/RestTool.php
+++ b/MangoPay/Libraries/RestTool.php
@@ -268,9 +268,9 @@ private function ReadResponseHeader($headers)
                     $updatedRateLimits = $this->initRateLimits();
                 }
                 $rateLimit = $this->findFirstRateLimitMatchingPredicate($updatedRateLimits, function ($rate) {
-                    return $rate->ResetTimeMillis == null;
+                    return $rate->ResetTimeTimestamp == null;
                 });
-                $rateLimit->ResetTimeMillis = (int)trim(str_replace('x-ratelimit-reset:', '', $lowercaseHeader));
+                $rateLimit->ResetTimeTimestamp = (int)trim(str_replace('x-ratelimit-reset:', '', $lowercaseHeader));
             }
         }
 
diff --git a/MangoPay/RateLimit.php b/MangoPay/RateLimit.php
index 2997e532..6a9861b4 100644
--- a/MangoPay/RateLimit.php
+++ b/MangoPay/RateLimit.php
@@ -23,9 +23,9 @@ class RateLimit
     public $CallsRemaining;
 
     /**
-     * @var integer the time in millis when the number of allowed calls in this time interval will be reset.
+     * @var integer the time in unix timestamp when the number of allowed calls in this time interval will be reset.
      */
-    public $ResetTimeMillis;
+    public $ResetTimeTimestamp;
 
     /**
      * RateLimit constructor.
diff --git a/MangoPay/Shipping.php b/MangoPay/Shipping.php
index ef4402ea..87da66f3 100644
--- a/MangoPay/Shipping.php
+++ b/MangoPay/Shipping.php
@@ -4,7 +4,7 @@
 namespace MangoPay;
 
 
-class Shipping
+class Shipping extends Libraries\Dto
 {
     /**
      * The First Name for Billing Address
diff --git a/README.md b/README.md
index eb8cca43..3fdc9d41 100644
--- a/README.md
+++ b/README.md
@@ -251,6 +251,7 @@ So there are 4 groups of rate limits available:
 4. Last 24 hours
 
 This information is available from the MangoPayApi instance, like in the following example:
+
 ```php
 <?php
 
@@ -282,10 +283,10 @@ class MangoPayService
         $rateLimits = $this->mangoPayApi->RateLimits;
         print "There were " . $rateLimits[0]->CallsMade . " calls made in the last 15 minutes\n";
         print "You can do " . $rateLimits[0]->CallsRemaining . " more calls in the next 15 minutes\n";
-        print "The 15 minutes counter will reset in " . $rateLimits[0]->ResetTimeMillis . " ms\n\n";
+        print "The 15 minutes counter will reset in " . $rateLimits[0]->ResetTimeTimestamp . " ms\n\n";
         print "There were " . $rateLimits[2]->CallsMade . " calls made in the last 60 minutes\n";
         print "You can do " . $rateLimits[2]->CallsRemaining . " more calls in the next 60 minutes\n";
-        print "The 60 minutes counter will reset in " . $rateLimits[1]->ResetTimeMillis . " ms\n\n";
+        print "The 60 minutes counter will reset in " . $rateLimits[1]->ResetTimeTimestamp . " ms\n\n";
     }
 }