diff --git a/composer.lock b/composer.lock
index 513a532..b5e73a0 100644
--- a/composer.lock
+++ b/composer.lock
@@ -569,6 +569,74 @@
             ],
             "time": "2017-02-15T22:25:47+00:00"
         },
+        {
+            "name": "doctrine/annotations",
+            "version": "v1.4.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/doctrine/annotations.git",
+                "reference": "54cacc9b81758b14e3ce750f205a393d52339e97"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/doctrine/annotations/zipball/54cacc9b81758b14e3ce750f205a393d52339e97",
+                "reference": "54cacc9b81758b14e3ce750f205a393d52339e97",
+                "shasum": ""
+            },
+            "require": {
+                "doctrine/lexer": "1.*",
+                "php": "^5.6 || ^7.0"
+            },
+            "require-dev": {
+                "doctrine/cache": "1.*",
+                "phpunit/phpunit": "^5.7"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.4.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Doctrine\\Common\\Annotations\\": "lib/Doctrine/Common/Annotations"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Roman Borschel",
+                    "email": "roman@code-factory.org"
+                },
+                {
+                    "name": "Benjamin Eberlei",
+                    "email": "kontakt@beberlei.de"
+                },
+                {
+                    "name": "Guilherme Blanco",
+                    "email": "guilhermeblanco@gmail.com"
+                },
+                {
+                    "name": "Jonathan Wage",
+                    "email": "jonwage@gmail.com"
+                },
+                {
+                    "name": "Johannes Schmitt",
+                    "email": "schmittjoh@gmail.com"
+                }
+            ],
+            "description": "Docblock Annotations Parser",
+            "homepage": "http://www.doctrine-project.org",
+            "keywords": [
+                "annotations",
+                "docblock",
+                "parser"
+            ],
+            "time": "2017-02-24T16:22:25+00:00"
+        },
         {
             "name": "doctrine/instantiator",
             "version": "1.0.5",
@@ -623,51 +691,115 @@
             ],
             "time": "2015-06-14T21:17:01+00:00"
         },
+        {
+            "name": "doctrine/lexer",
+            "version": "v1.0.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/doctrine/lexer.git",
+                "reference": "83893c552fd2045dd78aef794c31e694c37c0b8c"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/doctrine/lexer/zipball/83893c552fd2045dd78aef794c31e694c37c0b8c",
+                "reference": "83893c552fd2045dd78aef794c31e694c37c0b8c",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.3.2"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.0.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-0": {
+                    "Doctrine\\Common\\Lexer\\": "lib/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Roman Borschel",
+                    "email": "roman@code-factory.org"
+                },
+                {
+                    "name": "Guilherme Blanco",
+                    "email": "guilhermeblanco@gmail.com"
+                },
+                {
+                    "name": "Johannes Schmitt",
+                    "email": "schmittjoh@gmail.com"
+                }
+            ],
+            "description": "Base library for a lexer that can be used in Top-Down, Recursive Descent Parsers.",
+            "homepage": "http://www.doctrine-project.org",
+            "keywords": [
+                "lexer",
+                "parser"
+            ],
+            "time": "2014-09-09T13:34:57+00:00"
+        },
         {
             "name": "friendsofphp/php-cs-fixer",
-            "version": "v2.1.2",
+            "version": "v2.2.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/FriendsOfPHP/PHP-CS-Fixer.git",
-                "reference": "c7de769d7b44f2c9de68e1f678b65efd8126f60b"
+                "reference": "d6f17423412d33df6b69c9aaf12037b91703533b"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/FriendsOfPHP/PHP-CS-Fixer/zipball/c7de769d7b44f2c9de68e1f678b65efd8126f60b",
-                "reference": "c7de769d7b44f2c9de68e1f678b65efd8126f60b",
+                "url": "https://api.github.com/repos/FriendsOfPHP/PHP-CS-Fixer/zipball/d6f17423412d33df6b69c9aaf12037b91703533b",
+                "reference": "d6f17423412d33df6b69c9aaf12037b91703533b",
                 "shasum": ""
             },
             "require": {
+                "doctrine/annotations": "^1.2",
                 "ext-tokenizer": "*",
                 "php": "^5.3.6 || >=7.0 <7.2",
                 "sebastian/diff": "^1.1",
-                "symfony/console": "^2.3 || ^3.0",
+                "symfony/console": "^2.4 || ^3.0",
                 "symfony/event-dispatcher": "^2.1 || ^3.0",
                 "symfony/filesystem": "^2.4 || ^3.0",
                 "symfony/finder": "^2.2 || ^3.0",
+                "symfony/options-resolver": "^2.6 || ^3.0",
                 "symfony/polyfill-php54": "^1.0",
                 "symfony/polyfill-php55": "^1.3",
+                "symfony/polyfill-php70": "^1.0",
                 "symfony/polyfill-xml": "^1.3",
                 "symfony/process": "^2.3 || ^3.0",
                 "symfony/stopwatch": "^2.5 || ^3.0"
             },
             "conflict": {
-                "hhvm": "<3.9"
+                "hhvm": "<3.18"
             },
             "require-dev": {
                 "gecko-packages/gecko-php-unit": "^2.0",
                 "justinrainbow/json-schema": "^5.0",
                 "phpunit/phpunit": "^4.5 || ^5.0",
                 "satooshi/php-coveralls": "^1.0",
-                "symfony/phpunit-bridge": "^3.2"
+                "symfony/phpunit-bridge": "^3.2.2"
             },
             "suggest": {
-                "ext-xml": "For better performance."
+                "ext-mbstring": "For handling non-UTF8 characters in cache signature.",
+                "ext-xml": "For better performance.",
+                "symfony/polyfill-mbstring": "When enabling `ext-mbstring` is not possible."
             },
             "bin": [
                 "php-cs-fixer"
             ],
             "type": "application",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "2.2-dev"
+                }
+            },
             "autoload": {
                 "psr-4": {
                     "PhpCsFixer\\": "src/"
@@ -688,7 +820,7 @@
                 }
             ],
             "description": "A tool to automatically fix PHP code style",
-            "time": "2017-03-15T17:13:07+00:00"
+            "time": "2017-03-31T16:16:30+00:00"
         },
         {
             "name": "guzzle/guzzle",
@@ -1469,16 +1601,16 @@
         },
         {
             "name": "nette/utils",
-            "version": "v2.4.4",
+            "version": "v2.4.5",
             "source": {
                 "type": "git",
                 "url": "https://github.com/nette/utils.git",
-                "reference": "714afb64d0da07d0da7178cbf5680008e4b0180b"
+                "reference": "28ad4e2a6dcf143c23bde969a825f10a5d513602"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/nette/utils/zipball/714afb64d0da07d0da7178cbf5680008e4b0180b",
-                "reference": "714afb64d0da07d0da7178cbf5680008e4b0180b",
+                "url": "https://api.github.com/repos/nette/utils/zipball/28ad4e2a6dcf143c23bde969a825f10a5d513602",
+                "reference": "28ad4e2a6dcf143c23bde969a825f10a5d513602",
                 "shasum": ""
             },
             "require": {
@@ -1497,7 +1629,8 @@
                 "ext-intl": "for script transliteration in Strings::webalize() and toAscii()",
                 "ext-json": "to use Nette\\Utils\\Json",
                 "ext-mbstring": "to use Strings::lower() etc...",
-                "ext-xml": "to use Strings::length() etc. when mbstring is not available"
+                "ext-xml": "to use Strings::length() etc. when mbstring is not available",
+                "https://nette.org/donate": "\u001b[1;37;42m Please consider supporting Nette via a donation \u001b[0m"
             },
             "type": "library",
             "extra": {
@@ -1528,7 +1661,7 @@
             ],
             "description": "Nette Utility Classes",
             "homepage": "https://nette.org",
-            "time": "2017-01-16T12:30:14+00:00"
+            "time": "2017-03-29T16:55:54+00:00"
         },
         {
             "name": "nikic/php-parser",
@@ -1690,6 +1823,54 @@
             ],
             "time": "2016-01-05T23:08:01+00:00"
         },
+        {
+            "name": "paragonie/random_compat",
+            "version": "v2.0.10",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/paragonie/random_compat.git",
+                "reference": "634bae8e911eefa89c1abfbf1b66da679ac8f54d"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/paragonie/random_compat/zipball/634bae8e911eefa89c1abfbf1b66da679ac8f54d",
+                "reference": "634bae8e911eefa89c1abfbf1b66da679ac8f54d",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.2.0"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "4.*|5.*"
+            },
+            "suggest": {
+                "ext-libsodium": "Provides a modern crypto API that can be used to generate random bytes."
+            },
+            "type": "library",
+            "autoload": {
+                "files": [
+                    "lib/random.php"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Paragon Initiative Enterprises",
+                    "email": "security@paragonie.com",
+                    "homepage": "https://paragonie.com"
+                }
+            ],
+            "description": "PHP 5.x polyfill for random_bytes() and random_int() from PHP 7",
+            "keywords": [
+                "csprng",
+                "pseudorandom",
+                "random"
+            ],
+            "time": "2017-03-13T16:27:32+00:00"
+        },
         {
             "name": "pdepend/pdepend",
             "version": "2.5.0",
@@ -3542,6 +3723,60 @@
             "homepage": "https://symfony.com",
             "time": "2017-02-21T09:12:04+00:00"
         },
+        {
+            "name": "symfony/options-resolver",
+            "version": "v3.2.6",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/symfony/options-resolver.git",
+                "reference": "56e3d0a41313f8a54326851f10690d591e62a24c"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/symfony/options-resolver/zipball/56e3d0a41313f8a54326851f10690d591e62a24c",
+                "reference": "56e3d0a41313f8a54326851f10690d591e62a24c",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.5.9"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "3.2-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Symfony\\Component\\OptionsResolver\\": ""
+                },
+                "exclude-from-classmap": [
+                    "/Tests/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Fabien Potencier",
+                    "email": "fabien@symfony.com"
+                },
+                {
+                    "name": "Symfony Community",
+                    "homepage": "https://symfony.com/contributors"
+                }
+            ],
+            "description": "Symfony OptionsResolver Component",
+            "homepage": "https://symfony.com",
+            "keywords": [
+                "config",
+                "configuration",
+                "options"
+            ],
+            "time": "2017-02-21T09:12:04+00:00"
+        },
         {
             "name": "symfony/polyfill-php54",
             "version": "v1.3.0",
@@ -3656,6 +3891,65 @@
             ],
             "time": "2016-11-14T01:06:16+00:00"
         },
+        {
+            "name": "symfony/polyfill-php70",
+            "version": "v1.3.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/symfony/polyfill-php70.git",
+                "reference": "13ce343935f0f91ca89605a2f6ca6f5c2f3faac2"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/symfony/polyfill-php70/zipball/13ce343935f0f91ca89605a2f6ca6f5c2f3faac2",
+                "reference": "13ce343935f0f91ca89605a2f6ca6f5c2f3faac2",
+                "shasum": ""
+            },
+            "require": {
+                "paragonie/random_compat": "~1.0|~2.0",
+                "php": ">=5.3.3"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.3-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Symfony\\Polyfill\\Php70\\": ""
+                },
+                "files": [
+                    "bootstrap.php"
+                ],
+                "classmap": [
+                    "Resources/stubs"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Nicolas Grekas",
+                    "email": "p@tchwork.com"
+                },
+                {
+                    "name": "Symfony Community",
+                    "homepage": "https://symfony.com/contributors"
+                }
+            ],
+            "description": "Symfony polyfill backporting some PHP 7.0+ features to lower PHP versions",
+            "homepage": "https://symfony.com",
+            "keywords": [
+                "compatibility",
+                "polyfill",
+                "portable",
+                "shim"
+            ],
+            "time": "2016-11-14T01:06:16+00:00"
+        },
         {
             "name": "symfony/polyfill-xml",
             "version": "v1.3.0",
diff --git a/tests/Concerns/MakeHttpRequestsTest.php b/tests/Concerns/MakeHttpRequestsTest.php
index a98f4b3..4436e0c 100644
--- a/tests/Concerns/MakeHttpRequestsTest.php
+++ b/tests/Concerns/MakeHttpRequestsTest.php
@@ -40,68 +40,72 @@ public function it_can_make_get_requests()
     public function it_can_make_post_requests()
     {
         // Arrange
-        $expected   = $this->mockPageResponse();
-        $headers    = $this->expectedHeaders();
-        $parameters = ['foo' => 'bar'];
+        $expected      = $this->mockPageResponse();
+        $headers       = $this->expectedHeaders();
+        $parameters    = ['foo' => 'bar'];
+        $content       = 'baz=qux';
 
         // Act
-        $crawler = $this->crawler->post('http://www.example.com', $parameters, $headers);
+        $crawler = $this->crawler->post('http://www.example.com', $parameters, $headers, $content);
         $request = $crawler->getClient()->getHistory()->current();
 
         // Assert
         $this->assertResponseMatches($crawler, $expected);
-        $this->assertRequestMatches($request, $parameters, 'POST');
+        $this->assertRequestMatches($request, $parameters, 'POST', $content);
     }
 
     /** @test */
     public function it_can_make_put_requests()
     {
         // Arrange
-        $expected   = $this->mockPageResponse();
-        $headers    = $this->expectedHeaders();
-        $parameters = ['foo' => 'bar'];
+        $expected      = $this->mockPageResponse();
+        $headers       = $this->expectedHeaders();
+        $parameters    = ['foo' => 'bar'];
+        $content       = 'baz=qux';
 
         // Act
-        $crawler = $this->crawler->put('http://www.example.com', $parameters, $headers);
+        $crawler = $this->crawler->put('http://www.example.com', $parameters, $headers, $content);
         $request = $crawler->getClient()->getHistory()->current();
 
         // Assert
         $this->assertResponseMatches($crawler, $expected);
-        $this->assertRequestMatches($request, $parameters, 'PUT');
+        $this->assertRequestMatches($request, $parameters, 'PUT', $content);
     }
 
     /** @test */
     public function it_can_make_patch_requests()
     {
         // Arrange
-        $expected   = $this->mockPageResponse();
-        $headers    = $this->expectedHeaders();
-        $parameters = ['foo' => 'bar'];
+        $expected      = $this->mockPageResponse();
+        $headers       = $this->expectedHeaders();
+        $parameters    = ['foo' => 'bar'];
+        $content       = 'baz=qux';
 
         // Act
-        $crawler = $this->crawler->patch('http://www.example.com', $parameters, $headers);
+        $crawler = $this->crawler->patch('http://www.example.com', $parameters, $headers, $content);
         $request = $crawler->getClient()->getHistory()->current();
 
         // Assert
         $this->assertResponseMatches($crawler, $expected);
-        $this->assertRequestMatches($request, $parameters, 'PATCH');
+        $this->assertRequestMatches($request, $parameters, 'PATCH', $content);
     }
 
     /** @test */
     public function it_can_make_delete_requests()
     {
         // Arrange
-        $expected   = $this->mockPageResponse();
-        $headers    = $this->expectedHeaders();
-        $parameters = ['foo' => 'bar'];
+        $expected      = $this->mockPageResponse();
+        $headers       = $this->expectedHeaders();
+        $parameters    = ['foo' => 'bar'];
+        $content       = 'baz=qux';
 
         // Act
-        $crawler = $this->crawler->delete('http://www.example.com', $parameters, $headers);
+        $crawler = $this->crawler->delete('http://www.example.com', $parameters, $headers, $content);
         $request = $crawler->getClient()->getHistory()->current();
 
         // Assert
         $this->assertResponseMatches($crawler, $expected);
-        $this->assertRequestMatches($request, $parameters, 'DELETE');
+        $this->assertRequestMatches($request, $parameters, 'DELETE', $content);
     }
 
     private function mockPageResponse()
@@ -113,7 +117,7 @@ private function mockPageResponse()
         return $expected;
     }
 
-    private function assertRequestMatches(Request $request, array $parameters, string $method)
+    private function assertRequestMatches(Request $request, array $parameters, string $method, string $content = null)
     {
         $server = $request->getServer();
 
@@ -122,6 +126,7 @@ private function assertRequestMatches(Request $request, array $parameters, strin
 
         $this->assertSame($method, $request->getMethod());
         $this->assertSame($parameters, $request->getParameters());
+        $this->assertSame($content, $request->getContent());
     }
 
     private function expectedHeaders()