diff --git a/src/Format/ArrayFormat.php b/src/Format/ArrayFormat.php
index d645777..6dc4a70 100644
--- a/src/Format/ArrayFormat.php
+++ b/src/Format/ArrayFormat.php
@@ -18,8 +18,7 @@ class ArrayFormat implements IFormat
     {
         $result = json_encode($result);
 
-        return \response()->withContentType(ContentType::JSON)
-                          ->withBody(new Stream(json_encode($result, JSON_UNESCAPED_UNICODE)));
+        return \response()->withBody(new Stream(json_encode($result, JSON_UNESCAPED_UNICODE)));
     }
 
 
diff --git a/src/Handler.php b/src/Handler.php
index 051116c..07c5138 100644
--- a/src/Handler.php
+++ b/src/Handler.php
@@ -4,7 +4,6 @@ declare(strict_types=1);
 namespace Kiri\Router;
 
 use Closure;
-use Kiri\Router\Constrict\Stream;
 use Kiri\Router\Format\ArrayFormat;
 use Kiri\Router\Format\IFormat;
 use Kiri\Router\Format\MixedFormat;
@@ -15,7 +14,6 @@ use Psr\Http\Message\ServerRequestInterface;
 use Psr\Http\Server\RequestHandlerInterface;
 use ReflectionException;
 use ReflectionNamedType;
-use ReflectionType;
 
 class Handler implements RequestHandlerInterface
 {