diff --git a/phpBB/composer.json b/phpBB/composer.json
index c5e4824c0f..a6c3a2aa93 100644
--- a/phpBB/composer.json
+++ b/phpBB/composer.json
@@ -28,7 +28,7 @@
 		"php": ">=5.4,<7.1",
 		"bantu/ini-get-wrapper": "1.0.*",
 		"google/recaptcha": "~1.1",
-		"guzzle/guzzle": "~5.3",
+		"guzzlehttp/guzzle": "~5.3",
 		"lusitanian/oauth": "^0.8.1",
 		"marc1706/fast-image-size": "1.1.*",
 		"patchwork/utf8": "1.1.*",
diff --git a/phpBB/composer.lock b/phpBB/composer.lock
index 6412029b0b..09e558049d 100644
--- a/phpBB/composer.lock
+++ b/phpBB/composer.lock
@@ -4,8 +4,8 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#composer-lock-the-lock-file",
         "This file is @generated automatically"
     ],
-    "hash": "f76b5185058599cad6a87ef7c8c35fbf",
-    "content-hash": "b89d3c18f8d9b3c4dc476f92030a83a1",
+    "hash": "d4e2fb7ee961c4734df4e385db2e6995",
+    "content-hash": "b15dfee84d1e9f3e2f5a3cc290b0be58",
     "packages": [
         {
             "name": "bantu/ini-get-wrapper",
@@ -82,6 +82,165 @@
             ],
             "time": "2015-09-02 17:23:59"
         },
+        {
+            "name": "guzzlehttp/guzzle",
+            "version": "5.3.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/guzzle/guzzle.git",
+                "reference": "f3c8c22471cb55475105c14769644a49c3262b93"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/guzzle/guzzle/zipball/f3c8c22471cb55475105c14769644a49c3262b93",
+                "reference": "f3c8c22471cb55475105c14769644a49c3262b93",
+                "shasum": ""
+            },
+            "require": {
+                "guzzlehttp/ringphp": "^1.1",
+                "php": ">=5.4.0"
+            },
+            "require-dev": {
+                "ext-curl": "*",
+                "phpunit/phpunit": "^4.0",
+                "psr/log": "^1.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "5.0-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "GuzzleHttp\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Michael Dowling",
+                    "email": "mtdowling@gmail.com",
+                    "homepage": "https://github.com/mtdowling"
+                }
+            ],
+            "description": "Guzzle is a PHP HTTP client library and framework for building RESTful web service clients",
+            "homepage": "http://guzzlephp.org/",
+            "keywords": [
+                "client",
+                "curl",
+                "framework",
+                "http",
+                "http client",
+                "rest",
+                "web service"
+            ],
+            "time": "2015-05-20 03:47:55"
+        },
+        {
+            "name": "guzzlehttp/ringphp",
+            "version": "1.1.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/guzzle/RingPHP.git",
+                "reference": "dbbb91d7f6c191e5e405e900e3102ac7f261bc0b"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/guzzle/RingPHP/zipball/dbbb91d7f6c191e5e405e900e3102ac7f261bc0b",
+                "reference": "dbbb91d7f6c191e5e405e900e3102ac7f261bc0b",
+                "shasum": ""
+            },
+            "require": {
+                "guzzlehttp/streams": "~3.0",
+                "php": ">=5.4.0",
+                "react/promise": "~2.0"
+            },
+            "require-dev": {
+                "ext-curl": "*",
+                "phpunit/phpunit": "~4.0"
+            },
+            "suggest": {
+                "ext-curl": "Guzzle will use specific adapters if cURL is present"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.1-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "GuzzleHttp\\Ring\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Michael Dowling",
+                    "email": "mtdowling@gmail.com",
+                    "homepage": "https://github.com/mtdowling"
+                }
+            ],
+            "description": "Provides a simple API and specification that abstracts away the details of HTTP into a single PHP function.",
+            "time": "2015-05-20 03:37:09"
+        },
+        {
+            "name": "guzzlehttp/streams",
+            "version": "3.0.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/guzzle/streams.git",
+                "reference": "47aaa48e27dae43d39fc1cea0ccf0d84ac1a2ba5"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/guzzle/streams/zipball/47aaa48e27dae43d39fc1cea0ccf0d84ac1a2ba5",
+                "reference": "47aaa48e27dae43d39fc1cea0ccf0d84ac1a2ba5",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.4.0"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "~4.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "3.0-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "GuzzleHttp\\Stream\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Michael Dowling",
+                    "email": "mtdowling@gmail.com",
+                    "homepage": "https://github.com/mtdowling"
+                }
+            ],
+            "description": "Provides a simple abstraction over streams of data",
+            "homepage": "http://guzzlephp.org/",
+            "keywords": [
+                "Guzzle",
+                "stream"
+            ],
+            "time": "2014-10-12 19:18:40"
+        },
         {
             "name": "ircmaxell/password-compat",
             "version": "v1.0.4",
@@ -331,6 +490,50 @@
             ],
             "time": "2012-12-21 11:40:51"
         },
+        {
+            "name": "react/promise",
+            "version": "v2.2.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/reactphp/promise.git",
+                "reference": "3b6fca09c7d56321057fa8867c8dbe1abf648627"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/reactphp/promise/zipball/3b6fca09c7d56321057fa8867c8dbe1abf648627",
+                "reference": "3b6fca09c7d56321057fa8867c8dbe1abf648627",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.4.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "2.0-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "React\\Promise\\": "src/"
+                },
+                "files": [
+                    "src/functions_include.php"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Jan Sorgalla",
+                    "email": "jsorgalla@gmail.com"
+                }
+            ],
+            "description": "A lightweight implementation of CommonJS Promises/A for PHP",
+            "time": "2015-07-03 13:48:55"
+        },
         {
             "name": "s9e/text-formatter",
             "version": "0.4.8",
@@ -1498,165 +1701,6 @@
             ],
             "time": "2015-03-18 18:23:50"
         },
-        {
-            "name": "guzzlehttp/guzzle",
-            "version": "5.3.0",
-            "source": {
-                "type": "git",
-                "url": "https://github.com/guzzle/guzzle.git",
-                "reference": "f3c8c22471cb55475105c14769644a49c3262b93"
-            },
-            "dist": {
-                "type": "zip",
-                "url": "https://api.github.com/repos/guzzle/guzzle/zipball/f3c8c22471cb55475105c14769644a49c3262b93",
-                "reference": "f3c8c22471cb55475105c14769644a49c3262b93",
-                "shasum": ""
-            },
-            "require": {
-                "guzzlehttp/ringphp": "^1.1",
-                "php": ">=5.4.0"
-            },
-            "require-dev": {
-                "ext-curl": "*",
-                "phpunit/phpunit": "^4.0",
-                "psr/log": "^1.0"
-            },
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-            "extra": {
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-                    "dev-master": "5.0-dev"
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-                }
-            },
-            "notification-url": "https://packagist.org/downloads/",
-            "license": [
-                "MIT"
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-            "authors": [
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-                    "email": "mtdowling@gmail.com",
-                    "homepage": "https://github.com/mtdowling"
-                }
-            ],
-            "description": "Guzzle is a PHP HTTP client library and framework for building RESTful web service clients",
-            "homepage": "http://guzzlephp.org/",
-            "keywords": [
-                "client",
-                "curl",
-                "framework",
-                "http",
-                "http client",
-                "rest",
-                "web service"
-            ],
-            "time": "2015-05-20 03:47:55"
-        },
-        {
-            "name": "guzzlehttp/ringphp",
-            "version": "1.1.0",
-            "source": {
-                "type": "git",
-                "url": "https://github.com/guzzle/RingPHP.git",
-                "reference": "dbbb91d7f6c191e5e405e900e3102ac7f261bc0b"
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-                "url": "https://api.github.com/repos/guzzle/RingPHP/zipball/dbbb91d7f6c191e5e405e900e3102ac7f261bc0b",
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-            "require": {
-                "guzzlehttp/streams": "~3.0",
-                "php": ">=5.4.0",
-                "react/promise": "~2.0"
-            },
-            "require-dev": {
-                "ext-curl": "*",
-                "phpunit/phpunit": "~4.0"
-            },
-            "suggest": {
-                "ext-curl": "Guzzle will use specific adapters if cURL is present"
-            },
-            "type": "library",
-            "extra": {
-                "branch-alias": {
-                    "dev-master": "1.1-dev"
-                }
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-            "autoload": {
-                "psr-4": {
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-                }
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-                    "homepage": "https://github.com/mtdowling"
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-            "description": "Provides a simple API and specification that abstracts away the details of HTTP into a single PHP function.",
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-                "url": "https://github.com/guzzle/streams.git",
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-                "shasum": ""
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-            },
-            "type": "library",
-            "extra": {
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-                    "GuzzleHttp\\Stream\\": "src/"
-                }
-            },
-            "notification-url": "https://packagist.org/downloads/",
-            "license": [
-                "MIT"
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-                    "email": "mtdowling@gmail.com",
-                    "homepage": "https://github.com/mtdowling"
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-            "description": "Provides a simple abstraction over streams of data",
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-            "keywords": [
-                "Guzzle",
-                "stream"
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-            "time": "2014-10-12 19:18:40"
-        },
         {
             "name": "michelf/php-markdown",
             "version": "1.6.0",
@@ -2281,50 +2325,6 @@
             ],
             "time": "2013-03-08 08:21:40"
         },
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-            },
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-            "autoload": {
-                "psr-4": {
-                    "React\\Promise\\": "src/"
-                },
-                "files": [
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-                ]
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-                }
-            ],
-            "description": "A lightweight implementation of CommonJS Promises/A for PHP",
-            "time": "2015-07-03 13:48:55"
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             "name": "sami/sami",
             "version": "v1.4.1",