diff --git a/composer.lock b/composer.lock
index 7229f46..31e22fd 100644
--- a/composer.lock
+++ b/composer.lock
@@ -8,27 +8,29 @@
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+            "version": "6.5.5",
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-                "guzzlehttp/psr7": "^1.4",
-                "php": ">=5.5"
+                "guzzlehttp/psr7": "^1.6.1",
+                "php": ">=5.5",
+                "symfony/polyfill-intl-idn": "^1.17.0"
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-                "psr/log": "^1.0"
+                "psr/log": "^1.1"
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@@ -36,16 +38,16 @@
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+                    "dev-master": "6.5-dev"
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             "autoload": {
-                "files": [
-                    "src/functions_include.php"
-                ],
                 "psr-4": {
                     "GuzzleHttp\\": "src/"
-                }
+                },
+                "files": [
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+                ]
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@@ -69,7 +71,7 @@
                 "rest",
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-            "time": "2018-04-22T15:46:56+00:00"
+            "time": "2020-06-16T21:01:06+00:00"
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             "name": "guzzlehttp/promises",
@@ -124,33 +126,37 @@
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                 "psr/http-message": "~1.0",
-                "ralouphie/getallheaders": "^2.0.5"
+                "ralouphie/getallheaders": "^2.0.5 || ^3.0.0"
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             "provide": {
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+                "ext-zlib": "*",
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+            "suggest": {
+                "zendframework/zend-httphandlerrunner": "Emit PSR-7 responses"
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+                    "dev-master": "1.6-dev"
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@@ -187,24 +193,24 @@
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-            "time": "2018-12-04T20:46:45+00:00"
+            "time": "2019-07-01T23:21:34+00:00"
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-            "version": "2.4.1",
+            "version": "2.5.0",
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-                "reference": "cc114abc622a53af969e8664722e84ca36257530",
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+                "guzzlehttp/guzzle": "^6.0 || ^7.0",
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@@ -254,33 +260,37 @@
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-            "time": "2018-11-22T18:33:57+00:00"
+            "time": "2020-07-18T17:54:32+00:00"
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+            "version": "v2.0.18",
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+                "php": ">=5.2.0"
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-                "vimeo/psalm": "^1"
+                "phpunit/phpunit": "4.*|5.*"
             },
             "suggest": {
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             },
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+            "autoload": {
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+                ]
+            },
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@@ -299,7 +309,7 @@
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-            "time": "2018-07-02T15:55:56+00:00"
+            "time": "2019-01-03T20:59:08+00:00"
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@@ -353,24 +363,24 @@
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-                "satooshi/php-coveralls": ">=1.0"
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@@ -389,7 +399,323 @@
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-            "time": "2016-02-11T07:05:27+00:00"
+            "time": "2019-03-08T08:55:37+00:00"
+        },
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+            "notification-url": "https://packagist.org/downloads/",
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+                },
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+                    "email": "trevor.rowbotham@pm.me"
+                },
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+                    "homepage": "https://symfony.com/contributors"
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+            "keywords": [
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+                "idn",
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+                },
+                "files": [
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+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
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+                    "name": "Nicolas Grekas",
+                    "email": "p@tchwork.com"
+                },
+                {
+                    "name": "Symfony Community",
+                    "homepage": "https://symfony.com/contributors"
+                }
+            ],
+            "description": "Symfony polyfill backporting some PHP 7.2+ features to lower PHP versions",
+            "homepage": "https://symfony.com",
+            "keywords": [
+                "compatibility",
+                "polyfill",
+                "portable",
+                "shim"
+            ],
+            "funding": [
+                {
+                    "url": "https://symfony.com/sponsor",
+                    "type": "custom"
+                },
+                {
+                    "url": "https://github.com/fabpot",
+                    "type": "github"
+                },
+                {
+                    "url": "https://tidelift.com/funding/github/packagist/symfony/symfony",
+                    "type": "tidelift"
+                }
+            ],
+            "time": "2020-07-14T12:35:20+00:00"
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     ],
     "packages-dev": [],
@@ -401,5 +727,6 @@
     "platform": {
         "php": ">=5.5.0"
     },
-    "platform-dev": []
+    "platform-dev": [],
+    "plugin-api-version": "1.1.0"
 }