diff --git a/composer.json b/composer.json
index aeed60d..7158ccb 100644
--- a/composer.json
+++ b/composer.json
@@ -12,7 +12,7 @@
   "require": {
     "php": "^7.4|^8.0",
     "myclabs/php-enum": "^1.7",
-    "guzzlehttp/guzzle": "^6.5",
+    "guzzlehttp/guzzle": "^6.5 || ^7.0",
     "ext-json": "*"
   },
   "autoload": {
diff --git a/composer.lock b/composer.lock
index 6bcb7d9..671153f 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,41 +4,48 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "8bfd7c2178ded8acb5f6fb0fc90ae708",
+    "content-hash": "5de9065fbf9b570ed71980b05ce5ea24",
     "packages": [
         {
             "name": "guzzlehttp/guzzle",
-            "version": "6.5.5",
+            "version": "7.3.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/guzzle/guzzle.git",
-                "reference": "9d4290de1cfd701f38099ef7e183b64b4b7b0c5e"
+                "reference": "7008573787b430c1c1f650e3722d9bba59967628"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/guzzle/guzzle/zipball/9d4290de1cfd701f38099ef7e183b64b4b7b0c5e",
-                "reference": "9d4290de1cfd701f38099ef7e183b64b4b7b0c5e",
+                "url": "https://api.github.com/repos/guzzle/guzzle/zipball/7008573787b430c1c1f650e3722d9bba59967628",
+                "reference": "7008573787b430c1c1f650e3722d9bba59967628",
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             "require": {
                 "ext-json": "*",
-                "guzzlehttp/promises": "^1.0",
-                "guzzlehttp/psr7": "^1.6.1",
-                "php": ">=5.5",
-                "symfony/polyfill-intl-idn": "^1.17.0"
+                "guzzlehttp/promises": "^1.4",
+                "guzzlehttp/psr7": "^1.7 || ^2.0",
+                "php": "^7.2.5 || ^8.0",
+                "psr/http-client": "^1.0"
+            },
+            "provide": {
+                "psr/http-client-implementation": "1.0"
             },
             "require-dev": {
+                "bamarni/composer-bin-plugin": "^1.4.1",
                 "ext-curl": "*",
-                "phpunit/phpunit": "^4.8.35 || ^5.7 || ^6.4 || ^7.0",
+                "php-http/client-integration-tests": "^3.0",
+                "phpunit/phpunit": "^8.5.5 || ^9.3.5",
                 "psr/log": "^1.1"
             },
             "suggest": {
+                "ext-curl": "Required for CURL handler support",
+                "ext-intl": "Required for Internationalized Domain Name (IDN) support",
                 "psr/log": "Required for using the Log middleware"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "6.5-dev"
+                    "dev-master": "7.3-dev"
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@@ -58,6 +65,11 @@
                     "name": "Michael Dowling",
                     "email": "mtdowling@gmail.com",
                     "homepage": "https://github.com/mtdowling"
+                },
+                {
+                    "name": "Márk Sági-Kazár",
+                    "email": "mark.sagikazar@gmail.com",
+                    "homepage": "https://sagikazarmark.hu"
                 }
             ],
             "description": "Guzzle is a PHP HTTP client library",
@@ -68,14 +80,34 @@
                 "framework",
                 "http",
                 "http client",
+                "psr-18",
+                "psr-7",
                 "rest",
                 "web service"
             ],
             "support": {
                 "issues": "https://github.com/guzzle/guzzle/issues",
-                "source": "https://github.com/guzzle/guzzle/tree/6.5"
+                "source": "https://github.com/guzzle/guzzle/tree/7.3.0"
             },
-            "time": "2020-06-16T21:01:06+00:00"
+            "funding": [
+                {
+                    "url": "https://github.com/GrahamCampbell",
+                    "type": "github"
+                },
+                {
+                    "url": "https://github.com/Nyholm",
+                    "type": "github"
+                },
+                {
+                    "url": "https://github.com/alexeyshockov",
+                    "type": "github"
+                },
+                {
+                    "url": "https://github.com/gmponos",
+                    "type": "github"
+                }
+            ],
+            "time": "2021-03-23T11:33:13+00:00"
         },
         {
             "name": "guzzlehttp/promises",
@@ -267,6 +299,58 @@
             ],
             "time": "2021-02-15T16:11:48+00:00"
         },
+        {
+            "name": "psr/http-client",
+            "version": "1.0.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/php-fig/http-client.git",
+                "reference": "2dfb5f6c5eff0e91e20e913f8c5452ed95b86621"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/php-fig/http-client/zipball/2dfb5f6c5eff0e91e20e913f8c5452ed95b86621",
+                "reference": "2dfb5f6c5eff0e91e20e913f8c5452ed95b86621",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^7.0 || ^8.0",
+                "psr/http-message": "^1.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.0.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Psr\\Http\\Client\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "PHP-FIG",
+                    "homepage": "http://www.php-fig.org/"
+                }
+            ],
+            "description": "Common interface for HTTP clients",
+            "homepage": "https://github.com/php-fig/http-client",
+            "keywords": [
+                "http",
+                "http-client",
+                "psr",
+                "psr-18"
+            ],
+            "support": {
+                "source": "https://github.com/php-fig/http-client/tree/master"
+            },
+            "time": "2020-06-29T06:28:15+00:00"
+        },
         {
             "name": "psr/http-message",
             "version": "1.0.1",
@@ -363,253 +447,6 @@
                 "source": "https://github.com/ralouphie/getallheaders/tree/develop"
             },
             "time": "2019-03-08T08:55:37+00:00"
-        },
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-            "version": "v1.22.1",
-            "source": {
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-                "url": "https://github.com/symfony/polyfill-intl-idn.git",
-                "reference": "2d63434d922daf7da8dd863e7907e67ee3031483"
-            },
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-                "url": "https://api.github.com/repos/symfony/polyfill-intl-idn/zipball/2d63434d922daf7da8dd863e7907e67ee3031483",
-                "reference": "2d63434d922daf7da8dd863e7907e67ee3031483",
-                "shasum": ""
-            },
-            "require": {
-                "php": ">=7.1",
-                "symfony/polyfill-intl-normalizer": "^1.10",
-                "symfony/polyfill-php72": "^1.10"
-            },
-            "suggest": {
-                "ext-intl": "For best performance"
-            },
-            "type": "library",
-            "extra": {
-                "branch-alias": {
-                    "dev-main": "1.22-dev"
-                },
-                "thanks": {
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-                    "url": "https://github.com/symfony/polyfill"
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-            "autoload": {
-                "psr-4": {
-                    "Symfony\\Polyfill\\Intl\\Idn\\": ""
-                },
-                "files": [
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-                ]
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-            "notification-url": "https://packagist.org/downloads/",
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-                    "email": "laurent@bassin.info"
-                },
-                {
-                    "name": "Trevor Rowbotham",
-                    "email": "trevor.rowbotham@pm.me"
-                },
-                {
-                    "name": "Symfony Community",
-                    "homepage": "https://symfony.com/contributors"
-                }
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-            "description": "Symfony polyfill for intl's idn_to_ascii and idn_to_utf8 functions",
-            "homepage": "https://symfony.com",
-            "keywords": [
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