diff --git a/.gitignore b/.gitignore
index 55940e5..0d2007d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
 /vendor/
-composer.lock
\ No newline at end of file
+composer.lock
+.idea
\ No newline at end of file
diff --git a/.travis.yml b/.travis.yml
index 84c7bac..125ebe4 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,10 +1,9 @@
 language: php
 
 php:
-  - 5.6
-  - 7.0
   - 7.1
-  - hhvm
+  - 7.2
+  - 7.3
 
 env:
   - DEPS=lowest
diff --git a/README.md b/README.md
index 29487fb..6c04c47 100644
--- a/README.md
+++ b/README.md
@@ -8,7 +8,7 @@ Create instance of middleware as you want (we use [named constructors](http://ve
 ```php
 $date = DateTime::createFromFormat('Y-m-d H:i:s', '2025-11-30 11:12:13');
 
-$middleware = MaintenanceMiddleware::createWithRetryAsDateTime($date);
+$middleware = MaintenanceMiddleware::createWithRetryAsDateTime($date, $psr17ResponseFactory);
 
 $middlewareRunner->add(middleware);
 $middlewareRunner->run();
@@ -28,4 +28,6 @@ Use composer!
 
 ```bash
 composer require php-middleware/maintenance
-```
\ No newline at end of file
+```
+
+This package require [PSR-17 message factory](https://packagist.org/providers/psr/http-factory-implementation) implementation to return SEO friendly response.
\ No newline at end of file
diff --git a/composer.json b/composer.json
index a66bf6c..e9fcd72 100644
--- a/composer.json
+++ b/composer.json
@@ -7,17 +7,21 @@
         "middleware",
         "psr",
         "psr-7",
-        "maintenance"
+        "maintenance",
+        "psr-15",
+        "psr-17"
     ],
     "require": {
-        "php": ">=5.6",
+        "php": ">=7.1",
+        "psr/http-factory": "^1.0",
+        "psr/http-factory-implementation": "^1.0",
         "psr/http-message": "^1.0",
-        "php-middleware/double-pass-compatibility": "^1.0",
-        "http-interop/http-middleware": "^0.4.1"
+        "psr/http-server-middleware": "^1.0",
+        "psr/http-server-handler": "^1.0"
     },
     "require-dev": {
-        "phpunit/phpunit": "^5.6 || ^6.1",
-        "zendframework/zend-diactoros": "^1.1.3"
+        "phpunit/phpunit": "^7.3",
+        "zendframework/zend-diactoros": "^2.0"
     },
     "autoload": {
         "psr-4": {
diff --git a/phpunit.xml b/phpunit.xml
index 0344107..c52c8bb 100644
--- a/phpunit.xml
+++ b/phpunit.xml
@@ -2,7 +2,7 @@
 
 <phpunit bootstrap="./vendor/autoload.php" colors="true">
     <testsuites>
-        <testsuite>
+        <testsuite name="Unit">
             <directory>./test</directory>
         </testsuite>
     </testsuites>
diff --git a/src/MaintenanceMiddleware.php b/src/MaintenanceMiddleware.php
index c403de1..78702c6 100644
--- a/src/MaintenanceMiddleware.php
+++ b/src/MaintenanceMiddleware.php
@@ -4,17 +4,14 @@
 
 use DateTime;
 use DateTimeInterface;
-use Interop\Http\ServerMiddleware\DelegateInterface;
-use Interop\Http\ServerMiddleware\MiddlewareInterface;
-use InvalidArgumentException;
-use PhpMiddleware\DoublePassCompatibilityTrait;
+use Psr\Http\Message\ResponseFactoryInterface;
+use Psr\Http\Message\ResponseInterface;
 use Psr\Http\Message\ServerRequestInterface;
-use Zend\Diactoros\Response;
+use Psr\Http\Server\MiddlewareInterface;
+use Psr\Http\Server\RequestHandlerInterface;
 
-final class MaintenanceMiddleware implements MiddlewareInterface
+final class MaintenanceMiddleware implements RequestHandlerInterface, MiddlewareInterface
 {
-    use DoublePassCompatibilityTrait;
-
     /**
      * @var string
      */
@@ -24,89 +21,68 @@ final class MaintenanceMiddleware implements MiddlewareInterface
      * @var int
      */
     private $refresh = 0;
+    private $responseFactory;
 
-    private function __construct()
+    private function __construct(ResponseFactoryInterface $responseFactory)
     {
+        $this->responseFactory = $responseFactory;
     }
 
-    /**
-     * @return self
-     */
-    public static function create()
+    public static function create(ResponseFactoryInterface $responseFactory): self
     {
-        return new self();
+        return new self($responseFactory);
     }
 
-    /**
-     * @param int $seconds
-     *
-     * @return self
-     */
-    public static function createWithRetryAsSeconds($seconds)
+    public static function createWithRetryAsSeconds(int $seconds, ResponseFactoryInterface $responseFactory): self
     {
-        if (!is_int($seconds)) {
-            throw new InvalidArgumentException('Seconds must be integer');
-        }
-        $instance = new self();
+        $instance = new self($responseFactory);
         $instance->retryAfter = (string) $seconds;
 
         return $instance;
     }
 
-    /**
-     * @param int $seconds
-     *
-     * @return self
-     */
-    public static function createWithRetryAsSecondsAndRefresh($seconds)
+    public static function createWithRetryAsSecondsAndRefresh(int $seconds, ResponseFactoryInterface $responseFactory): self
     {
-        $instance = self::createWithRetryAsSeconds($seconds);
+        $instance = self::createWithRetryAsSeconds($seconds, $responseFactory);
         $instance->refresh = $seconds;
 
         return $instance;
     }
 
-    /**
-     * @param DateTimeInterface $datetime
-     *
-     * @return self
-     */
-    public static function createWithRetryAsDateTime(DateTimeInterface $datetime)
+    public static function createWithRetryAsDateTime(DateTimeInterface $datetime, ResponseFactoryInterface $responseFactory): self
     {
-        $instance = new self();
-
+        $instance = new self($responseFactory);
         $instance->retryAfter = $datetime->format(DateTime::RFC2822);
 
         return $instance;
     }
 
-    /**
-     * @param DateTimeInterface $datetime
-     *
-     * @return self
-     */
-    public static function createWithRetryAsDateTimeAndRefresh(DateTimeInterface $datetime)
+    public static function createWithRetryAsDateTimeAndRefresh(DateTimeInterface $datetime, ResponseFactoryInterface $responseFactory)
     {
-        $instance = self::createWithRetryAsDateTime($datetime);
+        $instance = self::createWithRetryAsDateTime($datetime, $responseFactory);
         $diff = time() - $datetime->getTimestamp();
         $instance->refresh = $diff;
 
         return $instance;
     }
 
-    public function process(ServerRequestInterface $request, DelegateInterface $delegate)
+    public function handle(ServerRequestInterface $request): ResponseInterface
     {
-        $headers = [];
+        $response = $this->responseFactory->createResponse(503);
 
         if ($this->retryAfter !== '') {
-            $headers['Retry-After'] = $this->retryAfter;
+            $response = $response->withHeader('Retry-After', $this->retryAfter);
 
             if ($this->refresh > 0) {
-                $headers['Refresh'] = (string) $this->refresh;
+                $response = $response->withHeader('Refresh', (string) $this->refresh);
             }
         }
 
-        return new Response('php://memory', 503, $headers);
+        return $response;
     }
 
+    public function process(ServerRequestInterface $request, RequestHandlerInterface $handler): ResponseInterface
+    {
+        return $this->handle($request);
+    }
 }
diff --git a/test/MaintenanceMiddlewareTest.php b/test/MaintenanceMiddlewareTest.php
index 6375ba4..3d34c82 100644
--- a/test/MaintenanceMiddlewareTest.php
+++ b/test/MaintenanceMiddlewareTest.php
@@ -6,23 +6,47 @@
 use Exception;
 use PhpMiddleware\Maintenance\MaintenanceMiddleware;
 use PHPUnit\Framework\TestCase;
+use Psr\Http\Message\ResponseInterface;
+use Psr\Http\Message\ServerRequestInterface;
+use Psr\Http\Server\RequestHandlerInterface;
 use Zend\Diactoros\Response;
+use Zend\Diactoros\ResponseFactory;
 use Zend\Diactoros\ServerRequest;
+use Zend\Diactoros\ServerRequestFactory;
 
 class MaintenanceMiddlewareTest extends TestCase
 {
+    private $request;
+    private $responseFactory;
+
+    protected function setUp()
+    {
+        $this->request = new ServerRequest();
+        $this->responseFactory = new ResponseFactory();
+    }
+
     public function testWithoutRetry()
     {
-        $request = new ServerRequest();
-        $response = new Response();
+        $middleware = MaintenanceMiddleware::create($this->responseFactory);
 
-        $middleware = MaintenanceMiddleware::create();
+        $response = $middleware->handle($this->request);
 
-        $next = function() {
-            throw new Exception('Next should not be called');
+        $this->assertSame(503, $response->getStatusCode());
+        $this->assertSame('', $response->getHeaderLine('Retry-After'));
+    }
+
+    public function testWithoutRetryAsMiddleware()
+    {
+        $middleware = MaintenanceMiddleware::create($this->responseFactory);
+
+        $requestHandler = new class implements RequestHandlerInterface {
+            public function handle(ServerRequestInterface $request): ResponseInterface
+            {
+                return new Response();
+            }
         };
 
-        $response = $middleware->__invoke($request, $response, $next);
+        $response = $middleware->process($this->request, $requestHandler);
 
         $this->assertSame(503, $response->getStatusCode());
         $this->assertSame('', $response->getHeaderLine('Retry-After'));
@@ -30,16 +54,9 @@ public function testWithoutRetry()
 
     public function testWithRetryAsSeconds()
     {
-        $request = new ServerRequest();
-        $response = new Response();
-
-        $middleware = MaintenanceMiddleware::createWithRetryAsSeconds(3600);
+        $middleware = MaintenanceMiddleware::createWithRetryAsSeconds(3600, $this->responseFactory);
 
-        $next = function() {
-            throw new Exception('Next should not be called');
-        };
-
-        $response = $middleware->__invoke($request, $response, $next);
+        $response = $middleware->handle($this->request);
 
         $this->assertSame(503, $response->getStatusCode());
         $this->assertSame('3600', $response->getHeaderLine('Retry-After'));
@@ -48,16 +65,9 @@ public function testWithRetryAsSeconds()
 
     public function testWithRetryAsSecondsWithRefresh()
     {
-        $request = new ServerRequest();
-        $response = new Response();
-
-        $middleware = MaintenanceMiddleware::createWithRetryAsSecondsAndRefresh(3600);
+        $middleware = MaintenanceMiddleware::createWithRetryAsSecondsAndRefresh(3600, $this->responseFactory);
 
-        $next = function() {
-            throw new Exception('Next should not be called');
-        };
-
-        $response = $middleware->__invoke($request, $response, $next);
+        $response = $middleware->handle($this->request);
 
         $this->assertSame(503, $response->getStatusCode());
         $this->assertSame('3600', $response->getHeaderLine('Retry-After'));
@@ -66,18 +76,11 @@ public function testWithRetryAsSecondsWithRefresh()
 
     public function testWithRetryAsDatetime()
     {
-        $request = new ServerRequest();
-        $response = new Response();
-
         $date = DateTime::createFromFormat('Y-m-d H:i:s', '2015-11-30 11:12:13');
 
-        $middleware = MaintenanceMiddleware::createWithRetryAsDateTime($date);
+        $middleware = MaintenanceMiddleware::createWithRetryAsDateTime($date, $this->responseFactory);
 
-        $next = function() {
-            throw new Exception('Next should not be called');
-        };
-
-        $response = $middleware->__invoke($request, $response, $next);
+        $response = $middleware->handle($this->request);
 
         $this->assertSame(503, $response->getStatusCode());
         $this->assertSame('Mon, 30 Nov 2015 11:12:13 +0000', $response->getHeaderLine('Retry-After'));
@@ -86,18 +89,11 @@ public function testWithRetryAsDatetime()
 
     public function testWithRetryAsDatetimeWithRefresh()
     {
-        $request = new ServerRequest();
-        $response = new Response();
-
         $date = DateTime::createFromFormat('Y-m-d H:i:s', '2015-11-30 11:12:13');
 
-        $middleware = MaintenanceMiddleware::createWithRetryAsDateTimeAndRefresh($date);
-
-        $next = function() {
-            throw new Exception('Next should not be called');
-        };
+        $middleware = MaintenanceMiddleware::createWithRetryAsDateTimeAndRefresh($date, $this->responseFactory);
 
-        $response = $middleware->__invoke($request, $response, $next);
+        $response = $middleware->handle($this->request);
 
         $this->assertSame(503, $response->getStatusCode());
         $this->assertSame('Mon, 30 Nov 2015 11:12:13 +0000', $response->getHeaderLine('Retry-After'));