diff --git a/composer.lock b/composer.lock
index 5679064..b8d5eb6 100644
--- a/composer.lock
+++ b/composer.lock
@@ -814,23 +814,24 @@
         },
         {
             "name": "swiftmailer/swiftmailer",
-            "version": "v5.4.1",
+            "version": "v5.4.12",
             "source": {
                 "type": "git",
                 "url": "https://github.com/swiftmailer/swiftmailer.git",
-                "reference": "0697e6aa65c83edf97bb0f23d8763f94e3f11421"
+                "reference": "181b89f18a90f8925ef805f950d47a7190e9b950"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/swiftmailer/swiftmailer/zipball/0697e6aa65c83edf97bb0f23d8763f94e3f11421",
-                "reference": "0697e6aa65c83edf97bb0f23d8763f94e3f11421",
+                "url": "https://api.github.com/repos/swiftmailer/swiftmailer/zipball/181b89f18a90f8925ef805f950d47a7190e9b950",
+                "reference": "181b89f18a90f8925ef805f950d47a7190e9b950",
                 "shasum": ""
             },
             "require": {
                 "php": ">=5.3.3"
             },
             "require-dev": {
-                "mockery/mockery": "~0.9.1,<0.9.4"
+                "mockery/mockery": "~0.9.1",
+                "symfony/phpunit-bridge": "~3.2"
             },
             "type": "library",
             "extra": {
@@ -857,13 +858,18 @@
                 }
             ],
             "description": "Swiftmailer, free feature-rich PHP mailer",
-            "homepage": "http://swiftmailer.org",
+            "homepage": "https://swiftmailer.symfony.com",
             "keywords": [
                 "email",
                 "mail",
                 "mailer"
             ],
-            "time": "2015-06-06T14:19:39+00:00"
+            "support": {
+                "issues": "https://github.com/swiftmailer/swiftmailer/issues",
+                "source": "https://github.com/swiftmailer/swiftmailer/tree/v5.4.12"
+            },
+            "abandoned": "symfony/mailer",
+            "time": "2018-07-31T09:26:32+00:00"
         },
         {
             "name": "symfony/debug",
@@ -1767,5 +1773,6 @@
         "ext-ldap": "*",
         "ext-sqlite3": "*"
     },
-    "platform-dev": []
+    "platform-dev": [],
+    "plugin-api-version": "2.6.0"
 }