diff --git a/src/Application/FinalCallback.php b/src/Application/FinalCallback.php
index 0647d843..167c4aa0 100644
--- a/src/Application/FinalCallback.php
+++ b/src/Application/FinalCallback.php
@@ -77,9 +77,15 @@ public function __invoke(ServerRequestInterface $request)
             $reflector = new \ReflectionFunction($closure);
         }
 
-        $function[1] = $this->container->arguments($reflector, $function[1]);
+        /** @var callable */
+        $callable = $function[0];
 
-        $this->function = call_user_func_array($function[0], $function[1]);
+        /** @var array<string, mixed> */
+        $parameters = $function[1];
+
+        $parameters = $this->container->arguments($reflector, $parameters);
+
+        $this->function = call_user_func_array($callable, $parameters);
 
         return $this->finalize($this->function);
     }
diff --git a/src/Http/HttpIntegration.php b/src/Http/HttpIntegration.php
index 1dbb78b2..63984849 100644
--- a/src/Http/HttpIntegration.php
+++ b/src/Http/HttpIntegration.php
@@ -42,7 +42,7 @@ public function define(ContainerInterface $container, Configuration $config)
         /** @var array<string, string> */
         $query = $globals[2];
 
-        /** @var array<string, array<string, string>> */
+        /** @var array<string, array<string, string[]>> */
         $files = $globals[3];
 
         /** @var array<string, mixed>|null|object */
diff --git a/src/Http/ServerRequest.php b/src/Http/ServerRequest.php
index b8313c1d..c493eb07 100644
--- a/src/Http/ServerRequest.php
+++ b/src/Http/ServerRequest.php
@@ -60,7 +60,7 @@ class ServerRequest extends Request implements ServerRequestInterface
      * @param array<string, string>                  $server
      * @param array<string, string>                  $cookies
      * @param array<string, string>                  $query
-     * @param array<string, array<string, string>>   $uploaded
+     * @param array<string, array<string, string[]>> $uploaded
      * @param array<string, mixed>|null|object       $data
      * @param array<string, string>                  $attributes
      * @param \Psr\Http\Message\UriInterface|null    $uri
diff --git a/src/Http/UploadedFile.php b/src/Http/UploadedFile.php
index ea065714..0ff95bec 100644
--- a/src/Http/UploadedFile.php
+++ b/src/Http/UploadedFile.php
@@ -147,24 +147,25 @@ public function moveTo($target)
     /**
      * Parses the $_FILES into multiple \File instances.
      *
-     * @param  array<string, mixed> $uploaded
+     * @param  array<string, array<string, string[]>> $uploaded
      * @return array<string, \Psr\Http\Message\UploadedFileInterface[]>
      */
     public static function normalize(array $uploaded)
     {
+        $diversed = self::diverse($uploaded);
+
+        /** @var array<string, \Psr\Http\Message\UploadedFileInterface[]> */
         $files = array();
 
-        foreach (self::diverse($uploaded) as $name => $file)
+        foreach ($diversed as $name => $file)
         {
-            list($files[$name], $items) = array($file, array());
+            $items = array();
 
             if (! isset($file['name'])) continue;
 
             foreach ($file['name'] as $key => $value)
             {
-                $instance = self::create($file, $key);
-
-                array_push($items, $instance);
+                $items[] = self::create($file, $key);
             }
 
             $files[$name] = (array) $items;
@@ -176,20 +177,25 @@ public static function normalize(array $uploaded)
     /**
      * Creates a new UploadedFile instance.
      *
-     * @param  array<string, mixed> $file
-     * @param  integer              $key
+     * @param  array<string, array<int, string|integer>> $file
+     * @param  integer                                   $key
      * @return \Psr\Http\Message\UploadedFileInterface
      */
     protected static function create(array $file, $key)
     {
+        /** @var string */
         $tmp = $file['tmp_name'][$key];
 
+        /** @var integer */
         $size = $file['size'][$key];
 
+        /** @var integer */
         $error = $file['error'][$key];
 
+        /** @var string */
         $original = $file['name'][$key];
 
+        /** @var string */
         $type = $file['type'][$key];
 
         return new UploadedFile($tmp, $size, $error, $original, $type);
@@ -198,8 +204,8 @@ protected static function create(array $file, $key)
     /**
      * Diverse the $_FILES into a consistent result.
      *
-     * @param  array<string, mixed> $uploaded
-     * @return array<string, mixed>
+     * @param  array<string, array<string, string[]>> $uploaded
+     * @return array<string, array<string, string[]>>
      */
     protected static function diverse(array $uploaded)
     {
diff --git a/src/Routing/Dispatcher.php b/src/Routing/Dispatcher.php
index 6c73912c..a53d63e1 100644
--- a/src/Routing/Dispatcher.php
+++ b/src/Routing/Dispatcher.php
@@ -136,11 +136,11 @@ protected function parse($httpMethod, $uri, $route)
 
     /**
      * Retrieved the specified route from the result.
-     * 
+     *
      * @param  array<int, array<int, \Interop\Http\ServerMiddleware\MiddlewareInterface[]|string[]|string>|null> $routes
      * @param  string $uri
      * @return array<int, \Interop\Http\ServerMiddleware\MiddlewareInterface[]|string[]|string>
-     * 
+     *
      * @throws \UnexpectedValueException
      */
     protected function retrieve(array $routes, $uri)