diff --git a/src/Http/MessageTrait.php b/src/Http/MessageTrait.php
index fa3a1459..e46d291e 100644
--- a/src/Http/MessageTrait.php
+++ b/src/Http/MessageTrait.php
@@ -4,7 +4,6 @@ namespace Engelsystem\Http;
 
 
 use Psr\Http\Message\StreamInterface;
-use Symfony\Component\HttpFoundation\ResponseHeaderBag;
 use Zend\Diactoros\Stream;
 
 /**
@@ -41,7 +40,12 @@ trait MessageTrait
     public function withProtocolVersion($version)
     {
         $new = clone $this;
-        $new->setProtocolVersion($version);
+        if (method_exists($new, 'setProtocolVersion')) {
+            $new->setProtocolVersion($version);
+        } else {
+            $new->server->set('SERVER_PROTOCOL', $version);
+        }
+
         return $new;
     }
 
@@ -72,7 +76,11 @@ trait MessageTrait
      */
     public function getHeaders()
     {
-        return $this->headers->allPreserveCase();
+        if (method_exists($this->headers, 'allPreserveCase')) {
+            return $this->headers->allPreserveCase();
+        }
+
+        return $this->headers->all();
     }
 
     /**
@@ -228,7 +236,12 @@ trait MessageTrait
     public function withBody(StreamInterface $body)
     {
         $new = clone $this;
-        $new->setContent($body);
+
+        if (method_exists($new, 'setContent')) {
+            $new->setContent($body);
+        } else {
+            $new->content = $body;
+        }
 
         return $new;
     }
diff --git a/src/Http/Request.php b/src/Http/Request.php
index c6a9e5ad..fd3bff42 100644
--- a/src/Http/Request.php
+++ b/src/Http/Request.php
@@ -2,10 +2,15 @@
 
 namespace Engelsystem\Http;
 
+use Psr\Http\Message\RequestInterface;
+use Psr\Http\Message\UriInterface;
 use Symfony\Component\HttpFoundation\Request as SymfonyRequest;
+use Zend\Diactoros\Uri;
 
-class Request extends SymfonyRequest
+class Request extends SymfonyRequest implements RequestInterface
 {
+    use MessageTrait;
+
     /**
      * Get POST input
      *
@@ -64,4 +69,128 @@ class Request extends SymfonyRequest
     {
         return rtrim(preg_replace('/\?.*/', '', $this->getUri()), '/');
     }
+
+    /**
+     * Retrieves the message's request target.
+     *
+     *
+     * Retrieves the message's request-target either as it will appear (for
+     * clients), as it appeared at request (for servers), or as it was
+     * specified for the instance (see withRequestTarget()).
+     *
+     * In most cases, this will be the origin-form of the composed URI,
+     * unless a value was provided to the concrete implementation (see
+     * withRequestTarget() below).
+     *
+     * If no URI is available, and no request-target has been specifically
+     * provided, this method MUST return the string "/".
+     *
+     * @return string
+     */
+    public function getRequestTarget()
+    {
+        $query = $this->getQueryString();
+        return '/' . $this->path() . (!empty($query) ? '?' . $query : '');
+    }
+
+    /**
+     * Return an instance with the specific request-target.
+     *
+     * If the request needs a non-origin-form request-target — e.g., for
+     * specifying an absolute-form, authority-form, or asterisk-form —
+     * this method may be used to create an instance with the specified
+     * request-target, verbatim.
+     *
+     * This method MUST be implemented in such a way as to retain the
+     * immutability of the message, and MUST return an instance that has the
+     * changed request target.
+     *
+     * @link http://tools.ietf.org/html/rfc7230#section-5.3 (for the various
+     *     request-target forms allowed in request messages)
+     * @param mixed $requestTarget
+     * @return static
+     */
+    public function withRequestTarget($requestTarget)
+    {
+        return $this->create($requestTarget);
+    }
+
+    /**
+     * Return an instance with the provided HTTP method.
+     *
+     * While HTTP method names are typically all uppercase characters, HTTP
+     * method names are case-sensitive and thus implementations SHOULD NOT
+     * modify the given string.
+     *
+     * This method MUST be implemented in such a way as to retain the
+     * immutability of the message, and MUST return an instance that has the
+     * changed request method.
+     *
+     * @param string $method Case-sensitive method.
+     * @return static
+     * @throws \InvalidArgumentException for invalid HTTP methods.
+     */
+    public function withMethod($method)
+    {
+        $new = clone $this;
+        $new->setMethod($method);
+
+        return $new;
+    }
+
+    /**
+     * Returns an instance with the provided URI.
+     *
+     * This method MUST update the Host header of the returned request by
+     * default if the URI contains a host component. If the URI does not
+     * contain a host component, any pre-existing Host header MUST be carried
+     * over to the returned request.
+     *
+     * You can opt-in to preserving the original state of the Host header by
+     * setting `$preserveHost` to `true`. When `$preserveHost` is set to
+     * `true`, this method interacts with the Host header in the following ways:
+     *
+     * - If the Host header is missing or empty, and the new URI contains
+     *   a host component, this method MUST update the Host header in the returned
+     *   request.
+     * - If the Host header is missing or empty, and the new URI does not contain a
+     *   host component, this method MUST NOT update the Host header in the returned
+     *   request.
+     * - If a Host header is present and non-empty, this method MUST NOT update
+     *   the Host header in the returned request.
+     *
+     * This method MUST be implemented in such a way as to retain the
+     * immutability of the message, and MUST return an instance that has the
+     * new UriInterface instance.
+     *
+     * @link http://tools.ietf.org/html/rfc3986#section-4.3
+     * @param UriInterface $uri          New request URI to use.
+     * @param bool         $preserveHost Preserve the original state of the Host header.
+     * @return static
+     */
+    public function withUri(UriInterface $uri, $preserveHost = false)
+    {
+        $new = $this->create($uri);
+        if ($preserveHost) {
+            $new->headers->set('HOST', $this->getHost());
+        }
+
+        return $new;
+    }
+
+    /**
+     * Retrieves the URI instance.
+     *
+     * This method MUST return a UriInterface instance.
+     *
+     * @link http://tools.ietf.org/html/rfc3986#section-4.3
+     * @return string|UriInterface Returns a UriInterface instance
+     *     representing the URI of the request.
+     */
+    public function getUri()
+    {
+        $uri = parent::getUri();
+
+        return new Uri($uri);
+    }
 }
diff --git a/tests/Unit/Http/MessageTraitRequestTest.php b/tests/Unit/Http/MessageTraitRequestTest.php
new file mode 100644
index 00000000..7430b5d7
--- /dev/null
+++ b/tests/Unit/Http/MessageTraitRequestTest.php
@@ -0,0 +1,50 @@
+<?php
+
+namespace Engelsystem\Test\Unit\Http;
+
+use Engelsystem\Test\Unit\Http\Stub\MessageTraitRequestImplementation;
+use PHPUnit\Framework\TestCase;
+use Zend\Diactoros\Stream;
+
+class MessageTraitRequestTest extends TestCase
+{
+    /**
+     * @covers \Engelsystem\Http\MessageTrait::withProtocolVersion
+     */
+    public function testWithProtocolVersion()
+    {
+        $message = new MessageTraitRequestImplementation();
+        $newMessage = $message->withProtocolVersion('0.1');
+        $this->assertNotEquals($message, $newMessage);
+        $this->assertEquals('0.1', $newMessage->getProtocolVersion());
+    }
+
+    /**
+     * @covers \Engelsystem\Http\MessageTrait::getHeaders
+     */
+    public function testGetHeaders()
+    {
+        $message = new MessageTraitRequestImplementation();
+        $newMessage = $message->withHeader('lorem', 'ipsum');
+
+        $this->assertNotEquals($message, $newMessage);
+        $this->assertArraySubset(['lorem' => ['ipsum']], $newMessage->getHeaders());
+    }
+
+    /**
+     * @covers \Engelsystem\Http\MessageTrait::withBody
+     */
+    public function testWithBody()
+    {
+        /** @var Stream $stream */
+        $stream = new Stream('php://memory', 'wb+');
+        $stream->write('Test content');
+        $stream->rewind();
+
+        $message = new MessageTraitRequestImplementation();
+        $newMessage = $message->withBody($stream);
+
+        $this->assertNotEquals($message, $newMessage);
+        $this->assertEquals('Test content', $newMessage->getContent());
+    }
+}
diff --git a/tests/Unit/Http/MessageTraitTest.php b/tests/Unit/Http/MessageTraitResponseTest.php
similarity index 84%
rename from tests/Unit/Http/MessageTraitTest.php
rename to tests/Unit/Http/MessageTraitResponseTest.php
index 46076a67..f60360a3 100644
--- a/tests/Unit/Http/MessageTraitTest.php
+++ b/tests/Unit/Http/MessageTraitResponseTest.php
@@ -2,21 +2,21 @@
 
 namespace Engelsystem\Test\Unit\Http;
 
-use Engelsystem\Test\Unit\Http\Stub\MessageTraitImplementation;
+use Engelsystem\Test\Unit\Http\Stub\MessageTraitResponseImplementation;
 use PHPUnit\Framework\TestCase;
 use Psr\Http\Message\MessageInterface;
 use Psr\Http\Message\StreamInterface;
 use Symfony\Component\HttpFoundation\Response as SymfonyResponse;
 use Zend\Diactoros\Stream;
 
-class MessageTraitTest extends TestCase
+class MessageTraitResponseTest extends TestCase
 {
     /**
      * @covers \Engelsystem\Http\MessageTrait
      */
     public function testCreate()
     {
-        $message = new MessageTraitImplementation();
+        $message = new MessageTraitResponseImplementation();
         $this->assertInstanceOf(MessageInterface::class, $message);
         $this->assertInstanceOf(SymfonyResponse::class, $message);
     }
@@ -27,7 +27,7 @@ class MessageTraitTest extends TestCase
      */
     public function testGetProtocolVersion()
     {
-        $message = new MessageTraitImplementation();
+        $message = new MessageTraitResponseImplementation();
         $newMessage = $message->withProtocolVersion('0.1');
         $this->assertNotEquals($message, $newMessage);
         $this->assertEquals('0.1', $newMessage->getProtocolVersion());
@@ -38,7 +38,7 @@ class MessageTraitTest extends TestCase
      */
     public function testGetHeaders()
     {
-        $message = new MessageTraitImplementation();
+        $message = new MessageTraitResponseImplementation();
         $newMessage = $message->withHeader('Foo', 'bar');
 
         $this->assertNotEquals($message, $newMessage);
@@ -53,7 +53,7 @@ class MessageTraitTest extends TestCase
      */
     public function testHasHeader()
     {
-        $message = new MessageTraitImplementation();
+        $message = new MessageTraitResponseImplementation();
         $this->assertFalse($message->hasHeader('test'));
 
         $newMessage = $message->withHeader('test', '12345');
@@ -66,7 +66,7 @@ class MessageTraitTest extends TestCase
      */
     public function testGetHeader()
     {
-        $message = new MessageTraitImplementation();
+        $message = new MessageTraitResponseImplementation();
         $newMessage = $message->withHeader('foo', 'bar');
 
         $this->assertEquals(['bar'], $newMessage->getHeader('Foo'));
@@ -78,7 +78,7 @@ class MessageTraitTest extends TestCase
      */
     public function testGetHeaderLine()
     {
-        $message = new MessageTraitImplementation();
+        $message = new MessageTraitResponseImplementation();
         $newMessage = $message->withHeader('foo', ['bar', 'bla']);
 
         $this->assertEquals('', $newMessage->getHeaderLine('Lorem-Ipsum'));
@@ -90,7 +90,7 @@ class MessageTraitTest extends TestCase
      */
     public function testWithHeader()
     {
-        $message = new MessageTraitImplementation();
+        $message = new MessageTraitResponseImplementation();
         $newMessage = $message->withHeader('foo', 'bar');
 
         $this->assertNotEquals($message, $newMessage);
@@ -105,7 +105,7 @@ class MessageTraitTest extends TestCase
      */
     public function testWithAddedHeader()
     {
-        $message = new MessageTraitImplementation();
+        $message = new MessageTraitResponseImplementation();
         $newMessage = $message->withHeader('foo', 'bar');
 
         $this->assertNotEquals($message, $newMessage);
@@ -120,7 +120,7 @@ class MessageTraitTest extends TestCase
      */
     public function testWithoutHeader()
     {
-        $message = (new MessageTraitImplementation())->withHeader('foo', 'bar');
+        $message = (new MessageTraitResponseImplementation())->withHeader('foo', 'bar');
         $this->assertTrue($message->hasHeader('foo'));
 
         $newMessage = $message->withoutHeader('Foo');
@@ -133,7 +133,7 @@ class MessageTraitTest extends TestCase
      */
     public function testGetBody()
     {
-        $message = (new MessageTraitImplementation())->setContent('Foo bar!');
+        $message = (new MessageTraitResponseImplementation())->setContent('Foo bar!');
         $body = $message->getBody();
 
         $this->assertInstanceOf(StreamInterface::class, $body);
@@ -150,7 +150,7 @@ class MessageTraitTest extends TestCase
         $stream->write('Test content');
         $stream->rewind();
 
-        $message = new MessageTraitImplementation();
+        $message = new MessageTraitResponseImplementation();
         $newMessage = $message->withBody($stream);
 
         $this->assertNotEquals($message, $newMessage);
diff --git a/tests/Unit/Http/RequestTest.php b/tests/Unit/Http/RequestTest.php
index f8444b84..f7d69aff 100644
--- a/tests/Unit/Http/RequestTest.php
+++ b/tests/Unit/Http/RequestTest.php
@@ -5,6 +5,8 @@ namespace Engelsystem\Test\Unit\Http;
 use Engelsystem\Http\Request;
 use PHPUnit\Framework\TestCase;
 use PHPUnit_Framework_MockObject_MockObject as MockObject;
+use Psr\Http\Message\RequestInterface;
+use Psr\Http\Message\UriInterface;
 use Symfony\Component\HttpFoundation\Request as SymfonyRequest;
 
 class RequestTest extends TestCase
@@ -16,6 +18,7 @@ class RequestTest extends TestCase
     {
         $response = new Request();
         $this->assertInstanceOf(SymfonyRequest::class, $response);
+        $this->assertInstanceOf(RequestInterface::class, $response);
     }
 
     /**
@@ -106,4 +109,91 @@ class RequestTest extends TestCase
         $this->assertEquals('http://foo.bar/bla/foo', $request->url());
         $this->assertEquals('https://lorem.ipsum/dolor/sit', $request->url());
     }
+
+    /**
+     * @covers \Engelsystem\Http\Request::getRequestTarget
+     */
+    public function testGetRequestTarget()
+    {
+        /** @var Request|MockObject $request */
+        $request = $this
+            ->getMockBuilder(Request::class)
+            ->setMethods(['getQueryString', 'path'])
+            ->getMock();
+
+        $request->expects($this->exactly(2))
+            ->method('getQueryString')
+            ->willReturnOnConsecutiveCalls(null, 'foo=bar&lorem=ipsum');
+        $request->expects($this->exactly(2))
+            ->method('path')
+            ->willReturn('foo/bar');
+
+        $this->assertEquals('/foo/bar', $request->getRequestTarget());
+        $this->assertEquals('/foo/bar?foo=bar&lorem=ipsum', $request->getRequestTarget());
+    }
+
+    /**
+     * @covers \Engelsystem\Http\Request::withRequestTarget
+     */
+    public function testWithRequestTarget()
+    {
+        $request = new Request();
+        foreach (
+            [
+                '*',
+                '/foo/bar',
+                'https://lorem.ipsum/test?lor=em'
+            ] as $target
+        ) {
+            $new = $request->withRequestTarget($target);
+            $this->assertNotEquals($request, $new);
+        }
+    }
+
+    /**
+     * @covers \Engelsystem\Http\Request::withMethod
+     */
+    public function testWithMethod()
+    {
+        $request = new Request();
+
+        $new = $request->withMethod('PUT');
+
+        $this->assertNotEquals($request, $new);
+        $this->assertEquals('PUT', $new->getMethod());
+    }
+
+    /**
+     * @covers \Engelsystem\Http\Request::withUri
+     */
+    public function testWithUri()
+    {
+        /** @var UriInterface|MockObject $uri */
+        $uri = $this->getMockForAbstractClass(UriInterface::class);
+
+        $uri->expects($this->atLeastOnce())
+            ->method('__toString')
+            ->willReturn('http://foo.bar/bla?foo=bar');
+
+        $request = Request::create('http://lor.em/');
+
+        $new = $request->withUri($uri);
+        $this->assertNotEquals($request, $new);
+        $this->assertEquals('http://foo.bar/bla?foo=bar', (string)$new->getUri());
+
+        $new = $request->withUri($uri, true);
+        $this->assertEquals('http://lor.em/bla?foo=bar', (string)$new->getUri());
+    }
+
+    /**
+     * @covers \Engelsystem\Http\Request::getUri
+     */
+    public function testGetUri()
+    {
+        $request = Request::create('http://lor.em/test?bla=foo');
+
+        $uri = $request->getUri();
+        $this->assertInstanceOf(UriInterface::class, $uri);
+        $this->assertEquals('http://lor.em/test?bla=foo', (string)$uri);
+    }
 }
diff --git a/tests/Unit/Http/Stub/MessageTraitRequestImplementation.php b/tests/Unit/Http/Stub/MessageTraitRequestImplementation.php
new file mode 100644
index 00000000..04d08913
--- /dev/null
+++ b/tests/Unit/Http/Stub/MessageTraitRequestImplementation.php
@@ -0,0 +1,12 @@
+<?php
+
+namespace Engelsystem\Test\Unit\Http\Stub;
+
+use Engelsystem\Http\MessageTrait;
+use Psr\Http\Message\MessageInterface;
+use Symfony\Component\HttpFoundation\Request;
+
+class MessageTraitRequestImplementation extends Request implements MessageInterface
+{
+    use MessageTrait;
+}
diff --git a/tests/Unit/Http/Stub/MessageTraitImplementation.php b/tests/Unit/Http/Stub/MessageTraitResponseImplementation.php
similarity index 69%
rename from tests/Unit/Http/Stub/MessageTraitImplementation.php
rename to tests/Unit/Http/Stub/MessageTraitResponseImplementation.php
index d78fd0b2..2ec4b943 100644
--- a/tests/Unit/Http/Stub/MessageTraitImplementation.php
+++ b/tests/Unit/Http/Stub/MessageTraitResponseImplementation.php
@@ -6,7 +6,7 @@ use Engelsystem\Http\MessageTrait;
 use Psr\Http\Message\MessageInterface;
 use Symfony\Component\HttpFoundation\Response;
 
-class MessageTraitImplementation extends Response implements MessageInterface
+class MessageTraitResponseImplementation extends Response implements MessageInterface
 {
     use MessageTrait;
 }