diff --git a/src/Crawler.php b/src/Crawler.php
index 00091af..ac70fb8 100644
--- a/src/Crawler.php
+++ b/src/Crawler.php
@@ -218,8 +218,10 @@ protected function hasAlreadyCrawled(Url $url)
     protected function normalizeUrl(Url $url)
     {
         if ($url->isRelative()) {
+
             $url->setScheme($this->baseUrl->scheme)
-                 ->setHost($this->baseUrl->host);
+                ->setHost($this->baseUrl->host)
+                ->setPort($this->baseUrl->port);
         }
 
         if ($url->isProtocolIndependent()) {