diff --git a/app.json b/app.json
new file mode 100644
index 0000000..99756ad
--- /dev/null
+++ b/app.json
@@ -0,0 +1,5 @@
+{
+  "name": "disposable-mailbox",
+  "description": "self-hosted disposable email service (php) using catch-all and imap",
+  "repository": "https://github.com/synox/disposable-mailbox",
+}
diff --git a/composer.json b/composer.json
index dcb87c9..8b2fe10 100644
--- a/composer.json
+++ b/composer.json
@@ -1,6 +1,7 @@
 {
   "require": {
-    "php-imap/php-imap": "~2.0",
+    "php-imap/php-imap": "*",
+    "php": "^7.2",
     "gnugat/PronounceableWord": "*",
     "ezyang/htmlpurifier": "^4.9",
     "fightbulc/moment": "*"
diff --git a/composer.lock b/composer.lock
index ee3aa14..a94127f 100644
--- a/composer.lock
+++ b/composer.lock
@@ -1,24 +1,23 @@
 {
     "_readme": [
         "This file locks the dependencies of your project to a known state",
-        "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#composer-lock-the-lock-file",
+        "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-  "hash": "1175b971ed4569a8c9f93646384529e7",
-  "content-hash": "4b2136dccba636ec0370e8547b0a738e",
+    "content-hash": "b72f82faf18e750705e7e6439460f9d6",
     "packages": [
         {
             "name": "ezyang/htmlpurifier",
-          "version": "v4.10.0",
+            "version": "v4.10.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/ezyang/htmlpurifier.git",
-              "reference": "d85d39da4576a6934b72480be6978fb10c860021"
+                "reference": "d85d39da4576a6934b72480be6978fb10c860021"
             },
             "dist": {
                 "type": "zip",
-              "url": "https://api.github.com/repos/ezyang/htmlpurifier/zipball/d85d39da4576a6934b72480be6978fb10c860021",
-              "reference": "d85d39da4576a6934b72480be6978fb10c860021",
+                "url": "https://api.github.com/repos/ezyang/htmlpurifier/zipball/d85d39da4576a6934b72480be6978fb10c860021",
+                "reference": "d85d39da4576a6934b72480be6978fb10c860021",
                 "shasum": ""
             },
             "require": {
@@ -52,70 +51,70 @@
             "keywords": [
                 "html"
             ],
-          "time": "2018-02-23 01:58:20"
+            "time": "2018-02-23T01:58:20+00:00"
         },
-      {
-        "name": "fightbulc/moment",
-        "version": "1.26.10",
-        "source": {
-          "type": "git",
-          "url": "https://github.com/fightbulc/moment.php.git",
-          "reference": "2fe6607fdbbd45b48708f539c70fde89ca9d10e6"
-        },
-        "dist": {
-          "type": "zip",
-          "url": "https://api.github.com/repos/fightbulc/moment.php/zipball/2fe6607fdbbd45b48708f539c70fde89ca9d10e6",
-          "reference": "2fe6607fdbbd45b48708f539c70fde89ca9d10e6",
-          "shasum": ""
-        },
-        "require": {
-          "php": ">=5.3.0"
-        },
-        "require-dev": {
-          "phpunit/phpunit": "4.2.*"
-        },
-        "type": "library",
-        "autoload": {
-          "psr-4": {
-            "Moment\\": "src/"
-          }
-        },
-        "notification-url": "https://packagist.org/downloads/",
-        "license": [
-          "MIT"
-        ],
-        "authors": [
-          {
-            "name": "Ashish Tilara",
-            "email": "ashish@itcutives.com",
-            "role": "developer"
-          },
-          {
-            "name": "Jaroslaw Kozak",
-            "email": "jaroslaw.kozak68@gmail.com",
-            "role": "developer"
-          },
-          {
-            "name": "Tino Ehrich",
-            "email": "tino@bigpun.me",
-            "role": "developer"
-          }
-        ],
-        "description": "Parse, validate, manipulate, and display dates in PHP w/ i18n support. Inspired by moment.js",
-        "keywords": [
-          "date",
-          "display",
-          "format",
-          "i18n",
-          "locale",
-          "manipulate",
-          "moment",
-          "parse",
-          "time",
-          "translation",
-          "validate"
-        ],
-        "time": "2017-08-14 05:06:04"
+        {
+            "name": "fightbulc/moment",
+            "version": "1.26.10",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/fightbulc/moment.php.git",
+                "reference": "2fe6607fdbbd45b48708f539c70fde89ca9d10e6"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/fightbulc/moment.php/zipball/2fe6607fdbbd45b48708f539c70fde89ca9d10e6",
+                "reference": "2fe6607fdbbd45b48708f539c70fde89ca9d10e6",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.3.0"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "4.2.*"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "Moment\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Ashish Tilara",
+                    "email": "ashish@itcutives.com",
+                    "role": "developer"
+                },
+                {
+                    "name": "Jaroslaw Kozak",
+                    "email": "jaroslaw.kozak68@gmail.com",
+                    "role": "developer"
+                },
+                {
+                    "name": "Tino Ehrich",
+                    "email": "tino@bigpun.me",
+                    "role": "developer"
+                }
+            ],
+            "description": "Parse, validate, manipulate, and display dates in PHP w/ i18n support. Inspired by moment.js",
+            "keywords": [
+                "date",
+                "display",
+                "format",
+                "i18n",
+                "locale",
+                "manipulate",
+                "moment",
+                "parse",
+                "time",
+                "translation",
+                "validate"
+            ],
+            "time": "2017-08-14T05:06:04+00:00"
         },
         {
             "name": "gnugat/PronounceableWord",
@@ -157,34 +156,40 @@
                 "word"
             ],
             "abandoned": true,
-            "time": "2012-01-08 19:36:58"
+            "time": "2012-01-08T19:36:58+00:00"
         },
         {
             "name": "php-imap/php-imap",
-            "version": "2.0.3",
+            "version": "3.0.6",
             "source": {
                 "type": "git",
                 "url": "https://github.com/barbushin/php-imap.git",
-                "reference": "cc1a49a3f68090db182183c59ffbc09055d59f5b"
+                "reference": "d4f8ef4504dfb555857241aa7d1e414a1c229079"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/barbushin/php-imap/zipball/cc1a49a3f68090db182183c59ffbc09055d59f5b",
-                "reference": "cc1a49a3f68090db182183c59ffbc09055d59f5b",
+                "url": "https://api.github.com/repos/barbushin/php-imap/zipball/d4f8ef4504dfb555857241aa7d1e414a1c229079",
+                "reference": "d4f8ef4504dfb555857241aa7d1e414a1c229079",
                 "shasum": ""
             },
             "require": {
-                "php": ">=5.3.0"
+                "ext-imap": "*",
+                "php": ">=5.5"
             },
             "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "3.0-dev"
+                }
+            },
             "autoload": {
-                "psr-0": {
-                    "PhpImap": "src/"
+                "psr-4": {
+                    "PhpImap\\": "src/PhpImap"
                 }
             },
             "notification-url": "https://packagist.org/downloads/",
             "license": [
-                "BSD 3-Clause"
+                "MIT"
             ],
             "authors": [
                 {
@@ -193,14 +198,17 @@
                     "homepage": "http://linkedin.com/in/barbushin"
                 }
             ],
-            "description": "PHP class to access mailbox by POP3/IMAP/NNTP using IMAP extension",
+            "description": "Manage mailboxes, filter/get/delete emails in PHP (supports IMAP/POP3/NNTP)",
             "homepage": "https://github.com/barbushin/php-imap",
             "keywords": [
                 "imap",
                 "mail",
-                "php"
+                "mailbox",
+                "php",
+                "pop3",
+                "receive emails"
             ],
-            "time": "2015-09-16 07:40:39"
+            "time": "2017-12-22T12:53:34+00:00"
         }
     ],
     "packages-dev": [],
@@ -209,6 +217,8 @@
     "stability-flags": [],
     "prefer-stable": false,
     "prefer-lowest": false,
-    "platform": [],
+    "platform": {
+        "php": "^7.2"
+    },
     "platform-dev": []
 }