diff --git a/src/Http/Message.php b/src/Http/Message.php
index 63782bd..c806110 100644
--- a/src/Http/Message.php
+++ b/src/Http/Message.php
@@ -144,7 +144,7 @@ public function hasHeader($name) : bool
         return isset($this->headerNames[strtolower($name)]);
     }
 
-    public function getHeader($name)
+    public function getHeader($name) : array
     {
         $header = strtolower($name);
 
diff --git a/src/Http/Request.php b/src/Http/Request.php
index fc7817f..0a7d1c8 100644
--- a/src/Http/Request.php
+++ b/src/Http/Request.php
@@ -111,7 +111,7 @@ public function withMethod($method) : static
         return $obj;
     }
 
-    public function getUri()
+    public function getUri(): UriInterface
     {
         return $this->uri;
     }