diff --git a/composer.json b/composer.json
index 149916c..04bf068 100644
--- a/composer.json
+++ b/composer.json
@@ -12,7 +12,7 @@
   "require": {
     "php": "^7.4",
     "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 27daabf..05a110f 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": "4031fcc3ec66dce4444facb9a5f5c721",
+    "content-hash": "68dc922ddf792b74431728e29257c57f",
     "packages": [
         {
             "name": "guzzlehttp/guzzle",
-            "version": "6.5.2",
+            "version": "7.0.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/guzzle/guzzle.git",
-                "reference": "43ece0e75098b7ecd8d13918293029e555a50f82"
+                "reference": "2d9d3c186a6637a43193e66b097c50e4451eaab2"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/guzzle/guzzle/zipball/43ece0e75098b7ecd8d13918293029e555a50f82",
-                "reference": "43ece0e75098b7ecd8d13918293029e555a50f82",
+                "url": "https://api.github.com/repos/guzzle/guzzle/zipball/2d9d3c186a6637a43193e66b097c50e4451eaab2",
+                "reference": "2d9d3c186a6637a43193e66b097c50e4451eaab2",
                 "shasum": ""
             },
             "require": {
                 "ext-json": "*",
                 "guzzlehttp/promises": "^1.0",
                 "guzzlehttp/psr7": "^1.6.1",
-                "php": ">=5.5"
+                "php": "^7.2.5",
+                "psr/http-client": "^1.0"
+            },
+            "provide": {
+                "psr/http-client-implementation": "1.0"
             },
             "require-dev": {
+                "ergebnis/composer-normalize": "^2.0",
                 "ext-curl": "*",
-                "phpunit/phpunit": "^4.8.35 || ^5.7 || ^6.4 || ^7.0",
+                "php-http/client-integration-tests": "dev-phpunit8",
+                "phpunit/phpunit": "^8.5.5",
                 "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": "7.0-dev"
                 }
             },
             "autoload": {
@@ -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",
@@ -68,10 +80,12 @@
                 "framework",
                 "http",
                 "http client",
+                "psr-18",
+                "psr-7",
                 "rest",
                 "web service"
             ],
-            "time": "2019-12-23T11:57:10+00:00"
+            "time": "2020-06-27T10:33:25+00:00"
         },
         {
             "name": "guzzlehttp/promises",
@@ -240,6 +254,55 @@
             ],
             "time": "2019-08-19T13:53:00+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"
+            ],
+            "time": "2020-06-29T06:28:15+00:00"
+        },
         {
             "name": "psr/http-message",
             "version": "1.0.1",
@@ -1858,5 +1921,6 @@
         "php": "^7.4",
         "ext-json": "*"
     },
-    "platform-dev": []
+    "platform-dev": [],
+    "plugin-api-version": "1.1.0"
 }