diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6f29c73..5276b3a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,12 @@ All notable changes to this project will be documented in this file. This projec
 to [Semantic Versioning] (http://semver.org/). For change log format,
 use [Keep a Changelog] (http://keepachangelog.com/).
 
+## [1.3.1] - 2023-04-24
+
+### Fixed
+
+- Uri's creation with string port instead of integer
+
 ## [1.3.0] - 2023-04-14
 
 ### Added
diff --git a/src/Router.php b/src/Router.php
index 29418a1..975f6b5 100644
--- a/src/Router.php
+++ b/src/Router.php
@@ -168,7 +168,7 @@ public static function makeServerRequest(): ServerRequestInterface
         $requestUri = new Uri(
             $_SERVER['REQUEST_SCHEME'] ?? '',
             $_SERVER['HTTP_HOST'] ?? '',
-            $_SERVER['SERVER_PORT'] ?? 80,
+            (int)($_SERVER['SERVER_PORT'] ?? 80),
             $path ?? '',
             $queryString,
             '',