diff --git a/composer.json b/composer.json
index a71ea5a3c0..312e48c5e7 100644
--- a/composer.json
+++ b/composer.json
@@ -4,7 +4,7 @@
 		"slim/slim": "2.*",
 		"mtdowling/cron-expression": "1.0.*",
 		"zendframework/zend-validator": "2.*",
-		"zendframework/zend-mail": "2.*",
+		"zendframework/zend-mail": "2.5.2",
 		"zendframework/zend-ldap": "2.*",
 		"monolog/monolog": "1.*",
 		"yzalis/identicon": "*",
diff --git a/composer.lock b/composer.lock
index e5f74f354a..aed8a55653 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,8 +4,8 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#composer-lock-the-lock-file",
         "This file is @generated automatically"
     ],
-    "hash": "bbe970605dccdfcb703299fb5062a97a",
-    "content-hash": "d8b34e846d35918eeb1cbee0ac16091e",
+    "hash": "1255274fea690daf512f990763ea3afa",
+    "content-hash": "606642f3170381129dbe0612c8ed4fb7",
     "packages": [
         {
             "name": "composer/semver",
@@ -963,6 +963,56 @@
             ],
             "time": "2014-07-13 09:19:12"
         },
+        {
+            "name": "zendframework/zend-crypt",
+            "version": "2.6.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/zendframework/zend-crypt.git",
+                "reference": "1b2f5600bf6262904167116fa67b58ab1457036d"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/zendframework/zend-crypt/zipball/1b2f5600bf6262904167116fa67b58ab1457036d",
+                "reference": "1b2f5600bf6262904167116fa67b58ab1457036d",
+                "shasum": ""
+            },
+            "require": {
+                "container-interop/container-interop": "~1.0",
+                "php": "^5.5 || ^7.0",
+                "zendframework/zend-math": "^2.6",
+                "zendframework/zend-stdlib": "^2.7 || ^3.0"
+            },
+            "require-dev": {
+                "fabpot/php-cs-fixer": "1.7.*",
+                "phpunit/phpunit": "~4.0"
+            },
+            "suggest": {
+                "ext-mcrypt": "Required for most features of Zend\\Crypt"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "2.6-dev",
+                    "dev-develop": "2.7-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Zend\\Crypt\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "homepage": "https://github.com/zendframework/zend-crypt",
+            "keywords": [
+                "crypt",
+                "zf2"
+            ],
+            "time": "2016-02-03 23:46:30"
+        },
         {
             "name": "zendframework/zend-hydrator",
             "version": "1.1.0",
@@ -1120,45 +1170,40 @@
         },
         {
             "name": "zendframework/zend-mail",
-            "version": "2.7.1",
+            "version": "2.5.2",
             "source": {
                 "type": "git",
                 "url": "https://github.com/zendframework/zend-mail.git",
-                "reference": "2e817b58ebaa2b422a25d854106a91f74b6a7976"
+                "reference": "68b1357c6389d476d80c050a75bf3091e873202c"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/zendframework/zend-mail/zipball/2e817b58ebaa2b422a25d854106a91f74b6a7976",
-                "reference": "2e817b58ebaa2b422a25d854106a91f74b6a7976",
+                "url": "https://api.github.com/repos/zendframework/zend-mail/zipball/68b1357c6389d476d80c050a75bf3091e873202c",
+                "reference": "68b1357c6389d476d80c050a75bf3091e873202c",
                 "shasum": ""
             },
             "require": {
-                "php": "^5.5 || ^7.0",
-                "zendframework/zend-loader": "^2.5",
-                "zendframework/zend-mime": "^2.5",
-                "zendframework/zend-stdlib": "^2.7 || ^3.0",
-                "zendframework/zend-validator": "^2.6"
+                "php": ">=5.5",
+                "zendframework/zend-crypt": "~2.5",
+                "zendframework/zend-loader": "~2.5",
+                "zendframework/zend-mime": "~2.5",
+                "zendframework/zend-stdlib": "~2.5",
+                "zendframework/zend-validator": "~2.5"
             },
             "require-dev": {
-                "phpunit/phpunit": "^4.8",
-                "squizlabs/php_codesniffer": "^2.3.1",
-                "zendframework/zend-config": "^2.6",
-                "zendframework/zend-crypt": "^2.6",
-                "zendframework/zend-servicemanager": "^2.7.5 || ^3.0.3"
+                "fabpot/php-cs-fixer": "1.7.*",
+                "phpunit/phpunit": "~4.0",
+                "zendframework/zend-config": "~2.5",
+                "zendframework/zend-servicemanager": "~2.5"
             },
             "suggest": {
-                "zendframework/zend-crypt": "Crammd5 support in SMTP Auth",
-                "zendframework/zend-servicemanager": "^2.7.5 || ^3.0.3 when using SMTP to deliver messages"
+                "zendframework/zend-servicemanager": "Zend\\ServiceManager component"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "2.7-dev",
-                    "dev-develop": "2.8-dev"
-                },
-                "zf": {
-                    "component": "Zend\\Mail",
-                    "config-provider": "Zend\\Mail\\ConfigProvider"
+                    "dev-master": "2.5-dev",
+                    "dev-develop": "2.6-dev"
                 }
             },
             "autoload": {
@@ -1176,7 +1221,57 @@
                 "mail",
                 "zf2"
             ],
-            "time": "2016-05-09 21:52:30"
+            "time": "2015-09-10 18:21:00"
+        },
+        {
+            "name": "zendframework/zend-math",
+            "version": "2.7.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/zendframework/zend-math.git",
+                "reference": "f4358090d5d23973121f1ed0b376184b66d9edec"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/zendframework/zend-math/zipball/f4358090d5d23973121f1ed0b376184b66d9edec",
+                "reference": "f4358090d5d23973121f1ed0b376184b66d9edec",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^5.5 || ^7.0"
+            },
+            "require-dev": {
+                "fabpot/php-cs-fixer": "1.7.*",
+                "ircmaxell/random-lib": "~1.1",
+                "phpunit/phpunit": "~4.0"
+            },
+            "suggest": {
+                "ext-bcmath": "If using the bcmath functionality",
+                "ext-gmp": "If using the gmp functionality",
+                "ircmaxell/random-lib": "Fallback random byte generator for Zend\\Math\\Rand if Mcrypt extensions is unavailable"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "2.7-dev",
+                    "dev-develop": "2.8-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Zend\\Math\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "homepage": "https://github.com/zendframework/zend-math",
+            "keywords": [
+                "math",
+                "zf2"
+            ],
+            "time": "2016-04-07 16:29:53"
         },
         {
             "name": "zendframework/zend-mime",
@@ -1877,56 +1972,6 @@
             "description": "Symfony Yaml Component",
             "homepage": "https://symfony.com",
             "time": "2015-05-02 15:21:08"
-        },
-        {
-            "name": "zendframework/zend-math",
-            "version": "2.7.0",
-            "source": {
-                "type": "git",
-                "url": "https://github.com/zendframework/zend-math.git",
-                "reference": "f4358090d5d23973121f1ed0b376184b66d9edec"
-            },
-            "dist": {
-                "type": "zip",
-                "url": "https://api.github.com/repos/zendframework/zend-math/zipball/f4358090d5d23973121f1ed0b376184b66d9edec",
-                "reference": "f4358090d5d23973121f1ed0b376184b66d9edec",
-                "shasum": ""
-            },
-            "require": {
-                "php": "^5.5 || ^7.0"
-            },
-            "require-dev": {
-                "fabpot/php-cs-fixer": "1.7.*",
-                "ircmaxell/random-lib": "~1.1",
-                "phpunit/phpunit": "~4.0"
-            },
-            "suggest": {
-                "ext-bcmath": "If using the bcmath functionality",
-                "ext-gmp": "If using the gmp functionality",
-                "ircmaxell/random-lib": "Fallback random byte generator for Zend\\Math\\Rand if Mcrypt extensions is unavailable"
-            },
-            "type": "library",
-            "extra": {
-                "branch-alias": {
-                    "dev-master": "2.7-dev",
-                    "dev-develop": "2.8-dev"
-                }
-            },
-            "autoload": {
-                "psr-4": {
-                    "Zend\\Math\\": "src/"
-                }
-            },
-            "notification-url": "https://packagist.org/downloads/",
-            "license": [
-                "BSD-3-Clause"
-            ],
-            "homepage": "https://github.com/zendframework/zend-math",
-            "keywords": [
-                "math",
-                "zf2"
-            ],
-            "time": "2016-04-07 16:29:53"
         }
     ],
     "aliases": [],