diff --git a/composer.lock b/composer.lock
index 7332b22323..5909cdd7df 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
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+    "content-hash": "d159e6466c20ce25f0aa94b3e9598165",
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             "name": "cocur/slugify",
@@ -2773,25 +2773,28 @@
         },
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+            "version": "v6.2.0",
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                 "url": "https://github.com/swiftmailer/swiftmailer.git",
-                "reference": "8ddcb66ac10c392d3beb54829eef8ac1438595f4"
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-                "reference": "8ddcb66ac10c392d3beb54829eef8ac1438595f4",
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-                "php": ">=7.0.0"
+                "php": ">=7.0.0",
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+                "symfony/polyfill-intl-idn": "^1.10",
+                "symfony/polyfill-mbstring": "^1.0"
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-                "symfony/phpunit-bridge": "~3.3@dev"
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                 "ext-intl": "Needed to support internationalized email addresses",
@@ -2800,7 +2803,7 @@
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@@ -2828,7 +2831,7 @@
                 "mail",
                 "mailer"
             ],
-            "time": "2018-09-11T07:12:52+00:00"
+            "time": "2019-03-10T07:52:41+00:00"
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         {
             "name": "symfony/console",
@@ -3393,6 +3396,127 @@
             ],
             "time": "2018-08-06T14:22:27+00:00"
         },
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+                "url": "https://github.com/symfony/polyfill-iconv.git",
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+                "shasum": ""
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+            "require": {
+                "php": ">=5.3.3"
+            },
+            "suggest": {
+                "ext-iconv": "For best performance"
+            },
+            "type": "library",
+            "extra": {
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+                    "dev-master": "1.9-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Symfony\\Polyfill\\Iconv\\": ""
+                },
+                "files": [
+                    "bootstrap.php"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Nicolas Grekas",
+                    "email": "p@tchwork.com"
+                },
+                {
+                    "name": "Symfony Community",
+                    "homepage": "https://symfony.com/contributors"
+                }
+            ],
+            "description": "Symfony polyfill for the Iconv extension",
+            "homepage": "https://symfony.com",
+            "keywords": [
+                "compatibility",
+                "iconv",
+                "polyfill",
+                "portable",
+                "shim"
+            ],
+            "time": "2018-09-21T06:26:08+00:00"
+        },
+        {
+            "name": "symfony/polyfill-intl-idn",
+            "version": "v1.10.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/symfony/polyfill-intl-idn.git",
+                "reference": "89de1d44f2c059b266f22c9cc9124ddc4cd0987a"
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+                "shasum": ""
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+            "require": {
+                "php": ">=5.3.3",
+                "symfony/polyfill-mbstring": "^1.3",
+                "symfony/polyfill-php72": "^1.9"
+            },
+            "suggest": {
+                "ext-intl": "For best performance"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.9-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Symfony\\Polyfill\\Intl\\Idn\\": ""
+                },
+                "files": [
+                    "bootstrap.php"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Symfony Community",
+                    "homepage": "https://symfony.com/contributors"
+                },
+                {
+                    "name": "Laurent Bassin",
+                    "email": "laurent@bassin.info"
+                }
+            ],
+            "description": "Symfony polyfill for intl's idn_to_ascii and idn_to_utf8 functions",
+            "homepage": "https://symfony.com",
+            "keywords": [
+                "compatibility",
+                "idn",
+                "intl",
+                "polyfill",
+                "portable",
+                "shim"
+            ],
+            "time": "2018-09-30T16:36:12+00:00"
+        },
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             "name": "symfony/polyfill-mbstring",
             "version": "v1.10.0",