diff --git a/src/Common/Uri.php b/src/Common/Uri.php
index f6a274a..5205c0a 100644
--- a/src/Common/Uri.php
+++ b/src/Common/Uri.php
@@ -24,7 +24,7 @@ class Uri implements UriInterface
 
     protected null|string $fragment;
 
-    public function __construct(string $uri = null)
+    public function __construct(?string $uri = null)
     {
         $this->parse($uri);
     }
diff --git a/src/Stream/Stream.php b/src/Stream/Stream.php
index d78868d..804954b 100644
--- a/src/Stream/Stream.php
+++ b/src/Stream/Stream.php
@@ -107,7 +107,7 @@ class Stream implements StreamInterface
         return $this->hasMode('acwx+');
     }
 
-    public function write($string) : false|int
+    public function write($string) : int
     {
         if (! $this->isWritable()) {
             throw new \UnexpectedValueException("An error occured while trying to seek an unseekable stream.");
@@ -166,7 +166,7 @@ class Stream implements StreamInterface
         return $result;
     }
 
-    public function getMetadata(string $key = null) : mixed
+    public function getMetadata(?string $key = null) : mixed
     {
         $metadata = stream_get_meta_data($this->stream);