diff --git a/composer.json b/composer.json
index 2f0c362..8cb19aa 100644
--- a/composer.json
+++ b/composer.json
@@ -13,8 +13,10 @@
     "config": {
         "sort-packages": true
     },
+    
     "require": {
-        "guzzlehttp/guzzle": "~6.0"
+        "guzzlehttp/guzzle": "6.5.3",
+        "symfony/polyfill-intl-idn": "1.15"
     },
 	"autoload": {
 		"psr-4": {
diff --git a/composer.lock b/composer.lock
index e938dd6..6988f28 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,20 +4,20 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "22b99662c42b1bce23e00f76949f48df",
+    "content-hash": "0551fae7f4e8cf747f8e42410a9a0509",
     "packages": [
         {
             "name": "guzzlehttp/guzzle",
-            "version": "6.5.5",
+            "version": "6.5.3",
             "source": {
                 "type": "git",
                 "url": "https://github.com/guzzle/guzzle.git",
-                "reference": "9d4290de1cfd701f38099ef7e183b64b4b7b0c5e"
+                "reference": "aab4ebd862aa7d04f01a4b51849d657db56d882e"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/guzzle/guzzle/zipball/9d4290de1cfd701f38099ef7e183b64b4b7b0c5e",
-                "reference": "9d4290de1cfd701f38099ef7e183b64b4b7b0c5e",
+                "url": "https://api.github.com/repos/guzzle/guzzle/zipball/aab4ebd862aa7d04f01a4b51849d657db56d882e",
+                "reference": "aab4ebd862aa7d04f01a4b51849d657db56d882e",
                 "shasum": ""
             },
             "require": {
@@ -25,7 +25,7 @@
                 "guzzlehttp/promises": "^1.0",
                 "guzzlehttp/psr7": "^1.6.1",
                 "php": ">=5.5",
-                "symfony/polyfill-intl-idn": "^1.17.0"
+                "symfony/polyfill-intl-idn": "^1.11"
             },
             "require-dev": {
                 "ext-curl": "*",
@@ -71,11 +71,7 @@
                 "rest",
                 "web service"
             ],
-            "support": {
-                "issues": "https://github.com/guzzle/guzzle/issues",
-                "source": "https://github.com/guzzle/guzzle/tree/6.5"
-            },
-            "time": "2020-06-16T21:01:06+00:00"
+            "time": "2020-04-18T10:38:46+00:00"
         },
         {
             "name": "guzzlehttp/promises",
@@ -126,10 +122,6 @@
             "keywords": [
                 "promise"
             ],
-            "support": {
-                "issues": "https://github.com/guzzle/promises/issues",
-                "source": "https://github.com/guzzle/promises/tree/1.4.1"
-            },
             "time": "2021-03-07T09:25:29+00:00"
         },
         {
@@ -201,10 +193,6 @@
                 "uri",
                 "url"
             ],
-            "support": {
-                "issues": "https://github.com/guzzle/psr7/issues",
-                "source": "https://github.com/guzzle/psr7/tree/1.8.2"
-            },
             "time": "2021-04-26T09:17:50+00:00"
         },
         {
@@ -255,9 +243,6 @@
                 "request",
                 "response"
             ],
-            "support": {
-                "source": "https://github.com/php-fig/http-message/tree/master"
-            },
             "time": "2016-08-06T14:39:51+00:00"
         },
         {
@@ -298,29 +283,25 @@
                 }
             ],
             "description": "A polyfill for getallheaders.",
-            "support": {
-                "issues": "https://github.com/ralouphie/getallheaders/issues",
-                "source": "https://github.com/ralouphie/getallheaders/tree/develop"
-            },
             "time": "2019-03-08T08:55:37+00:00"
         },
         {
             "name": "symfony/polyfill-intl-idn",
-            "version": "v1.23.0",
+            "version": "v1.15.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/polyfill-intl-idn.git",
-                "reference": "65bd267525e82759e7d8c4e8ceea44f398838e65"
+                "reference": "47bd6aa45beb1cd7c6a16b7d1810133b728bdfcf"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/polyfill-intl-idn/zipball/65bd267525e82759e7d8c4e8ceea44f398838e65",
-                "reference": "65bd267525e82759e7d8c4e8ceea44f398838e65",
+                "url": "https://api.github.com/repos/symfony/polyfill-intl-idn/zipball/47bd6aa45beb1cd7c6a16b7d1810133b728bdfcf",
+                "reference": "47bd6aa45beb1cd7c6a16b7d1810133b728bdfcf",
                 "shasum": ""
             },
             "require": {
-                "php": ">=7.1",
-                "symfony/polyfill-intl-normalizer": "^1.10",
+                "php": ">=5.3.3",
+                "symfony/polyfill-mbstring": "^1.3",
                 "symfony/polyfill-php72": "^1.10"
             },
             "suggest": {
@@ -329,11 +310,7 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-main": "1.23-dev"
-                },
-                "thanks": {
-                    "name": "symfony/polyfill",
-                    "url": "https://github.com/symfony/polyfill"
+                    "dev-master": "1.15-dev"
                 }
             },
             "autoload": {
@@ -353,10 +330,6 @@
                     "name": "Laurent Bassin",
                     "email": "laurent@bassin.info"
                 },
-                {
-                    "name": "Trevor Rowbotham",
-                    "email": "trevor.rowbotham@pm.me"
-                },
                 {
                     "name": "Symfony Community",
                     "homepage": "https://symfony.com/contributors"
@@ -372,9 +345,6 @@
                 "portable",
                 "shim"
             ],
-            "support": {
-                "source": "https://github.com/symfony/polyfill-intl-idn/tree/v1.23.0"
-            },
             "funding": [
                 {
                     "url": "https://symfony.com/sponsor",
@@ -389,27 +359,27 @@
                     "type": "tidelift"
                 }
             ],
-            "time": "2021-05-27T09:27:20+00:00"
+            "time": "2020-03-09T19:04:49+00:00"
         },
         {
-            "name": "symfony/polyfill-intl-normalizer",
-            "version": "v1.23.0",
+            "name": "symfony/polyfill-mbstring",
+            "version": "v1.23.1",
             "source": {
                 "type": "git",
-                "url": "https://github.com/symfony/polyfill-intl-normalizer.git",
-                "reference": "8590a5f561694770bdcd3f9b5c69dde6945028e8"
+                "url": "https://github.com/symfony/polyfill-mbstring.git",
+                "reference": "9174a3d80210dca8daa7f31fec659150bbeabfc6"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/polyfill-intl-normalizer/zipball/8590a5f561694770bdcd3f9b5c69dde6945028e8",
-                "reference": "8590a5f561694770bdcd3f9b5c69dde6945028e8",
+                "url": "https://api.github.com/repos/symfony/polyfill-mbstring/zipball/9174a3d80210dca8daa7f31fec659150bbeabfc6",
+                "reference": "9174a3d80210dca8daa7f31fec659150bbeabfc6",
                 "shasum": ""
             },
             "require": {
                 "php": ">=7.1"
             },
             "suggest": {
-                "ext-intl": "For best performance"
+                "ext-mbstring": "For best performance"
             },
             "type": "library",
             "extra": {
@@ -423,13 +393,10 @@
             },
             "autoload": {
                 "psr-4": {
-                    "Symfony\\Polyfill\\Intl\\Normalizer\\": ""
+                    "Symfony\\Polyfill\\Mbstring\\": ""
                 },
                 "files": [
                     "bootstrap.php"
-                ],
-                "classmap": [
-                    "Resources/stubs"
                 ]
             },
             "notification-url": "https://packagist.org/downloads/",
@@ -446,19 +413,15 @@
                     "homepage": "https://symfony.com/contributors"
                 }
             ],
-            "description": "Symfony polyfill for intl's Normalizer class and related functions",
+            "description": "Symfony polyfill for the Mbstring extension",
             "homepage": "https://symfony.com",
             "keywords": [
                 "compatibility",
-                "intl",
-                "normalizer",
+                "mbstring",
                 "polyfill",
                 "portable",
                 "shim"
             ],
-            "support": {
-                "source": "https://github.com/symfony/polyfill-intl-normalizer/tree/v1.23.0"
-            },
             "funding": [
                 {
                     "url": "https://symfony.com/sponsor",
@@ -473,7 +436,7 @@
                     "type": "tidelift"
                 }
             ],
-            "time": "2021-02-19T12:13:01+00:00"
+            "time": "2021-05-27T12:26:48+00:00"
         },
         {
             "name": "symfony/polyfill-php72",
@@ -532,9 +495,6 @@
                 "portable",
                 "shim"
             ],
-            "support": {
-                "source": "https://github.com/symfony/polyfill-php72/tree/v1.23.0"
-            },
             "funding": [
                 {
                     "url": "https://symfony.com/sponsor",
@@ -560,5 +520,5 @@
     "prefer-lowest": false,
     "platform": [],
     "platform-dev": [],
-    "plugin-api-version": "2.1.0"
+    "plugin-api-version": "1.1.0"
 }