diff --git a/app/config/config_dev.yml b/app/config/config_dev.yml
index ff9c5dfef..797e715c6 100644
--- a/app/config/config_dev.yml
+++ b/app/config/config_dev.yml
@@ -30,4 +30,4 @@ monolog:
         #    level:  info
 
 #swiftmailer:
-#    delivery_address: me@example.com
+#    delivery_addresses: ['me@example.com']
diff --git a/composer.json b/composer.json
index 2877b764b..2ae8d4fe8 100644
--- a/composer.json
+++ b/composer.json
@@ -22,7 +22,7 @@
         "sensio/distribution-bundle"           : "^5.0",
         "sensio/framework-extra-bundle"        : "^3.0",
         "symfony/monolog-bundle"               : "^2.8",
-        "symfony/swiftmailer-bundle"           : "^2.3",
+        "symfony/swiftmailer-bundle"           : "^2.3.10",
         "symfony/symfony"                      : "^3.2",
         "twig/extensions"                      : "^1.3",
         "twig/twig"                            : "^1.28",
diff --git a/composer.lock b/composer.lock
index fc2200ddc..4a1b84216 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,8 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#composer-lock-the-lock-file",
         "This file is @generated automatically"
     ],
-    "hash": "c3a977bb116af47aa3d5a18c6ece4621",
-    "content-hash": "314f16901871e2ca166380d8c1208920",
+    "content-hash": "ae5be173f5f6cdd721992dbac187205a",
     "packages": [
         {
             "name": "doctrine/annotations",
@@ -73,7 +72,7 @@
                 "docblock",
                 "parser"
             ],
-            "time": "2015-08-31 12:32:49"
+            "time": "2015-08-31T12:32:49+00:00"
         },
         {
             "name": "doctrine/cache",
@@ -143,7 +142,7 @@
                 "cache",
                 "caching"
             ],
-            "time": "2016-10-29 11:16:17"
+            "time": "2016-10-29T11:16:17+00:00"
         },
         {
             "name": "doctrine/collections",
@@ -209,7 +208,7 @@
                 "collections",
                 "iterator"
             ],
-            "time": "2015-04-14 22:21:58"
+            "time": "2015-04-14T22:21:58+00:00"
         },
         {
             "name": "doctrine/common",
@@ -282,7 +281,7 @@
                 "persistence",
                 "spl"
             ],
-            "time": "2016-11-30 16:50:46"
+            "time": "2016-11-30T16:50:46+00:00"
         },
         {
             "name": "doctrine/data-fixtures",
@@ -339,7 +338,7 @@
             "keywords": [
                 "database"
             ],
-            "time": "2015-03-30 12:14:13"
+            "time": "2015-03-30T12:14:13+00:00"
         },
         {
             "name": "doctrine/dbal",
@@ -410,7 +409,7 @@
                 "persistence",
                 "queryobject"
             ],
-            "time": "2016-09-09 19:13:33"
+            "time": "2016-09-09T19:13:33+00:00"
         },
         {
             "name": "doctrine/doctrine-bundle",
@@ -491,7 +490,7 @@
                 "orm",
                 "persistence"
             ],
-            "time": "2016-08-10 15:35:22"
+            "time": "2016-08-10T15:35:22+00:00"
         },
         {
             "name": "doctrine/doctrine-cache-bundle",
@@ -579,7 +578,7 @@
                 "cache",
                 "caching"
             ],
-            "time": "2016-01-26 17:28:51"
+            "time": "2016-01-26T17:28:51+00:00"
         },
         {
             "name": "doctrine/doctrine-fixtures-bundle",
@@ -636,7 +635,7 @@
                 "Fixture",
                 "persistence"
             ],
-            "time": "2015-11-04 21:23:23"
+            "time": "2015-11-04T21:23:23+00:00"
         },
         {
             "name": "doctrine/inflector",
@@ -703,7 +702,7 @@
                 "singularize",
                 "string"
             ],
-            "time": "2015-11-06 14:35:42"
+            "time": "2015-11-06T14:35:42+00:00"
         },
         {
             "name": "doctrine/instantiator",
@@ -757,7 +756,7 @@
                 "constructor",
                 "instantiate"
             ],
-            "time": "2015-06-14 21:17:01"
+            "time": "2015-06-14T21:17:01+00:00"
         },
         {
             "name": "doctrine/lexer",
@@ -811,7 +810,7 @@
                 "lexer",
                 "parser"
             ],
-            "time": "2014-09-09 13:34:57"
+            "time": "2014-09-09T13:34:57+00:00"
         },
         {
             "name": "doctrine/orm",
@@ -887,7 +886,7 @@
                 "database",
                 "orm"
             ],
-            "time": "2016-09-10 18:51:13"
+            "time": "2016-09-10T18:51:13+00:00"
         },
         {
             "name": "erusev/parsedown",
@@ -929,7 +928,7 @@
                 "markdown",
                 "parser"
             ],
-            "time": "2016-11-02 15:56:58"
+            "time": "2016-11-02T15:56:58+00:00"
         },
         {
             "name": "ezyang/htmlpurifier",
@@ -973,7 +972,7 @@
             "keywords": [
                 "html"
             ],
-            "time": "2016-07-16 12:58:58"
+            "time": "2016-07-16T12:58:58+00:00"
         },
         {
             "name": "incenteev/composer-parameter-handler",
@@ -1024,7 +1023,7 @@
             "keywords": [
                 "parameters management"
             ],
-            "time": "2015-11-10 17:04:01"
+            "time": "2015-11-10T17:04:01+00:00"
         },
         {
             "name": "jdorn/sql-formatter",
@@ -1074,7 +1073,7 @@
                 "highlight",
                 "sql"
             ],
-            "time": "2014-01-12 16:20:24"
+            "time": "2014-01-12T16:20:24+00:00"
         },
         {
             "name": "monolog/monolog",
@@ -1152,7 +1151,7 @@
                 "logging",
                 "psr-3"
             ],
-            "time": "2016-11-26 00:15:39"
+            "time": "2016-11-26T00:15:39+00:00"
         },
         {
             "name": "pagerfanta/pagerfanta",
@@ -1219,7 +1218,7 @@
                 "paginator",
                 "paging"
             ],
-            "time": "2016-11-28 09:17:04"
+            "time": "2016-11-28T09:17:04+00:00"
         },
         {
             "name": "paragonie/random_compat",
@@ -1267,7 +1266,7 @@
                 "pseudorandom",
                 "random"
             ],
-            "time": "2016-11-07 23:38:38"
+            "time": "2016-11-07T23:38:38+00:00"
         },
         {
             "name": "psr/cache",
@@ -1313,7 +1312,7 @@
                 "psr",
                 "psr-6"
             ],
-            "time": "2016-08-06 20:24:11"
+            "time": "2016-08-06T20:24:11+00:00"
         },
         {
             "name": "psr/log",
@@ -1360,7 +1359,7 @@
                 "psr",
                 "psr-3"
             ],
-            "time": "2016-10-10 12:19:37"
+            "time": "2016-10-10T12:19:37+00:00"
         },
         {
             "name": "sensio/distribution-bundle",
@@ -1412,7 +1411,7 @@
                 "configuration",
                 "distribution"
             ],
-            "time": "2016-12-06 07:29:27"
+            "time": "2016-12-06T07:29:27+00:00"
         },
         {
             "name": "sensio/framework-extra-bundle",
@@ -1480,7 +1479,7 @@
                 "annotations",
                 "controllers"
             ],
-            "time": "2016-12-14 08:30:06"
+            "time": "2016-12-14T08:30:06+00:00"
         },
         {
             "name": "sensiolabs/security-checker",
@@ -1524,7 +1523,7 @@
                 }
             ],
             "description": "A security checker for your composer.lock",
-            "time": "2016-09-23 18:09:57"
+            "time": "2016-09-23T18:09:57+00:00"
         },
         {
             "name": "swiftmailer/swiftmailer",
@@ -1577,7 +1576,7 @@
                 "mail",
                 "mailer"
             ],
-            "time": "2016-11-24 01:01:23"
+            "time": "2016-11-24T01:01:23+00:00"
         },
         {
             "name": "symfony/monolog-bundle",
@@ -1637,7 +1636,7 @@
                 "log",
                 "logging"
             ],
-            "time": "2016-11-06 18:54:50"
+            "time": "2016-11-06T18:54:50+00:00"
         },
         {
             "name": "symfony/polyfill-intl-icu",
@@ -1695,7 +1694,7 @@
                 "portable",
                 "shim"
             ],
-            "time": "2016-11-14 01:06:16"
+            "time": "2016-11-14T01:06:16+00:00"
         },
         {
             "name": "symfony/polyfill-mbstring",
@@ -1754,7 +1753,7 @@
                 "portable",
                 "shim"
             ],
-            "time": "2016-11-14 01:06:16"
+            "time": "2016-11-14T01:06:16+00:00"
         },
         {
             "name": "symfony/polyfill-php56",
@@ -1810,7 +1809,7 @@
                 "portable",
                 "shim"
             ],
-            "time": "2016-11-14 01:06:16"
+            "time": "2016-11-14T01:06:16+00:00"
         },
         {
             "name": "symfony/polyfill-php70",
@@ -1869,7 +1868,7 @@
                 "portable",
                 "shim"
             ],
-            "time": "2016-11-14 01:06:16"
+            "time": "2016-11-14T01:06:16+00:00"
         },
         {
             "name": "symfony/polyfill-util",
@@ -1921,7 +1920,7 @@
                 "polyfill",
                 "shim"
             ],
-            "time": "2016-11-14 01:06:16"
+            "time": "2016-11-14T01:06:16+00:00"
         },
         {
             "name": "symfony/swiftmailer-bundle",
@@ -1980,7 +1979,7 @@
             ],
             "description": "Symfony SwiftmailerBundle",
             "homepage": "http://symfony.com",
-            "time": "2016-10-27 17:59:30"
+            "time": "2016-10-27T17:59:30+00:00"
         },
         {
             "name": "symfony/symfony",
@@ -2122,7 +2121,7 @@
             "keywords": [
                 "framework"
             ],
-            "time": "2016-12-13 13:20:15"
+            "time": "2016-12-13T13:20:15+00:00"
         },
         {
             "name": "twig/extensions",
@@ -2174,7 +2173,7 @@
                 "i18n",
                 "text"
             ],
-            "time": "2016-10-25 17:34:14"
+            "time": "2016-10-25T17:34:14+00:00"
         },
         {
             "name": "twig/twig",
@@ -2235,7 +2234,7 @@
             "keywords": [
                 "templating"
             ],
-            "time": "2016-12-13 17:28:18"
+            "time": "2016-12-13T17:28:18+00:00"
         },
         {
             "name": "white-october/pagerfanta-bundle",
@@ -2287,7 +2286,7 @@
                 "page",
                 "paging"
             ],
-            "time": "2016-08-04 15:48:14"
+            "time": "2016-08-04T15:48:14+00:00"
         }
     ],
     "packages-dev": [
@@ -2347,7 +2346,7 @@
                 }
             ],
             "description": "A tool to automatically fix PHP code style",
-            "time": "2016-12-01 00:05:05"
+            "time": "2016-12-01T00:05:05+00:00"
         },
         {
             "name": "phpdocumentor/reflection-common",
@@ -2401,7 +2400,7 @@
                 "reflection",
                 "static analysis"
             ],
-            "time": "2015-12-27 11:43:31"
+            "time": "2015-12-27T11:43:31+00:00"
         },
         {
             "name": "phpdocumentor/reflection-docblock",
@@ -2446,7 +2445,7 @@
                 }
             ],
             "description": "With this component, a library can provide support for annotations via DocBlocks or otherwise retrieve information that is embedded in a DocBlock.",
-            "time": "2016-09-30 07:12:33"
+            "time": "2016-09-30T07:12:33+00:00"
         },
         {
             "name": "phpdocumentor/type-resolver",
@@ -2493,7 +2492,7 @@
                     "email": "me@mikevanriel.com"
                 }
             ],
-            "time": "2016-11-25 06:54:22"
+            "time": "2016-11-25T06:54:22+00:00"
         },
         {
             "name": "phpspec/prophecy",
@@ -2556,7 +2555,7 @@
                 "spy",
                 "stub"
             ],
-            "time": "2016-11-21 14:58:47"
+            "time": "2016-11-21T14:58:47+00:00"
         },
         {
             "name": "phpunit/php-code-coverage",
@@ -2618,7 +2617,7 @@
                 "testing",
                 "xunit"
             ],
-            "time": "2015-10-06 15:47:00"
+            "time": "2015-10-06T15:47:00+00:00"
         },
         {
             "name": "phpunit/php-file-iterator",
@@ -2665,7 +2664,7 @@
                 "filesystem",
                 "iterator"
             ],
-            "time": "2016-10-03 07:40:28"
+            "time": "2016-10-03T07:40:28+00:00"
         },
         {
             "name": "phpunit/php-text-template",
@@ -2706,7 +2705,7 @@
             "keywords": [
                 "template"
             ],
-            "time": "2015-06-21 13:50:34"
+            "time": "2015-06-21T13:50:34+00:00"
         },
         {
             "name": "phpunit/php-timer",
@@ -2750,7 +2749,7 @@
             "keywords": [
                 "timer"
             ],
-            "time": "2016-05-12 18:03:57"
+            "time": "2016-05-12T18:03:57+00:00"
         },
         {
             "name": "phpunit/php-token-stream",
@@ -2799,7 +2798,7 @@
             "keywords": [
                 "tokenizer"
             ],
-            "time": "2016-11-15 14:06:22"
+            "time": "2016-11-15T14:06:22+00:00"
         },
         {
             "name": "phpunit/phpunit",
@@ -2871,7 +2870,7 @@
                 "testing",
                 "xunit"
             ],
-            "time": "2016-12-09 02:45:31"
+            "time": "2016-12-09T02:45:31+00:00"
         },
         {
             "name": "phpunit/phpunit-mock-objects",
@@ -2927,7 +2926,7 @@
                 "mock",
                 "xunit"
             ],
-            "time": "2015-10-02 06:51:40"
+            "time": "2015-10-02T06:51:40+00:00"
         },
         {
             "name": "sebastian/comparator",
@@ -2991,7 +2990,7 @@
                 "compare",
                 "equality"
             ],
-            "time": "2016-11-19 09:18:40"
+            "time": "2016-11-19T09:18:40+00:00"
         },
         {
             "name": "sebastian/diff",
@@ -3043,7 +3042,7 @@
             "keywords": [
                 "diff"
             ],
-            "time": "2015-12-08 07:14:41"
+            "time": "2015-12-08T07:14:41+00:00"
         },
         {
             "name": "sebastian/environment",
@@ -3093,7 +3092,7 @@
                 "environment",
                 "hhvm"
             ],
-            "time": "2016-08-18 05:49:44"
+            "time": "2016-08-18T05:49:44+00:00"
         },
         {
             "name": "sebastian/exporter",
@@ -3160,7 +3159,7 @@
                 "export",
                 "exporter"
             ],
-            "time": "2016-06-17 09:04:28"
+            "time": "2016-06-17T09:04:28+00:00"
         },
         {
             "name": "sebastian/global-state",
@@ -3211,7 +3210,7 @@
             "keywords": [
                 "global state"
             ],
-            "time": "2015-10-12 03:26:01"
+            "time": "2015-10-12T03:26:01+00:00"
         },
         {
             "name": "sebastian/recursion-context",
@@ -3264,7 +3263,7 @@
             ],
             "description": "Provides functionality to recursively process PHP variables",
             "homepage": "http://www.github.com/sebastianbergmann/recursion-context",
-            "time": "2015-11-11 19:50:13"
+            "time": "2015-11-11T19:50:13+00:00"
         },
         {
             "name": "sebastian/version",
@@ -3299,7 +3298,7 @@
             ],
             "description": "Library that helps with managing the version number of Git-hosted PHP projects",
             "homepage": "https://github.com/sebastianbergmann/version",
-            "time": "2015-06-21 13:59:46"
+            "time": "2015-06-21T13:59:46+00:00"
         },
         {
             "name": "sensio/generator-bundle",
@@ -3351,7 +3350,7 @@
                 }
             ],
             "description": "This bundle generates code for you",
-            "time": "2016-12-05 16:01:19"
+            "time": "2016-12-05T16:01:19+00:00"
         },
         {
             "name": "symfony/phpunit-bridge",
@@ -3409,7 +3408,7 @@
             ],
             "description": "Symfony PHPUnit Bridge",
             "homepage": "https://symfony.com",
-            "time": "2016-12-12 13:31:08"
+            "time": "2016-12-12T13:31:08+00:00"
         },
         {
             "name": "webmozart/assert",
@@ -3459,7 +3458,7 @@
                 "check",
                 "validate"
             ],
-            "time": "2016-11-23 20:04:58"
+            "time": "2016-11-23T20:04:58+00:00"
         }
     ],
     "aliases": [],