diff --git a/composer.json b/composer.json
index edbdc5d23..579da7a47 100644
--- a/composer.json
+++ b/composer.json
@@ -60,7 +60,7 @@
         "roave/security-advisories": "dev-master",
         "symfony/css-selector": "~4.0",
         "symfony/dom-crawler": "~4.0",
-        "vimeo/psalm": "~2.0"
+        "vimeo/psalm": "~3.0"
     },
     "suggest": {
         "ext-apcu": "*"
diff --git a/composer.lock b/composer.lock
index 85840449a..1342e5101 100644
--- a/composer.lock
+++ b/composer.lock
@@ -1,10 +1,10 @@
 {
     "_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#installing-dependencies",
+        "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#composer-lock-the-lock-file",
         "This file is @generated automatically"
     ],
-    "content-hash": "7ad461aab7fb870894af46cb8d74b4ad",
+    "content-hash": "a15166ced7e0b716976ee6e7215b0881",
     "packages": [
         {
             "name": "aws/aws-sdk-php",
@@ -7677,6 +7677,141 @@
         }
     ],
     "packages-dev": [
+        {
+            "name": "amphp/amp",
+            "version": "v2.1.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/amphp/amp.git",
+                "reference": "7075ef7d74dbd32626bfd31c976b23055c3ade6a"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/amphp/amp/zipball/7075ef7d74dbd32626bfd31c976b23055c3ade6a",
+                "reference": "7075ef7d74dbd32626bfd31c976b23055c3ade6a",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=7"
+            },
+            "require-dev": {
+                "amphp/phpunit-util": "^1",
+                "friendsofphp/php-cs-fixer": "^2.3",
+                "phpstan/phpstan": "^0.8.5",
+                "phpunit/phpunit": "^6.0.9",
+                "react/promise": "^2"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "2.0.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Amp\\": "lib"
+                },
+                "files": [
+                    "lib/functions.php",
+                    "lib/Internal/functions.php"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Bob Weinand",
+                    "email": "bobwei9@hotmail.com"
+                },
+                {
+                    "name": "Niklas Keller",
+                    "email": "me@kelunik.com"
+                },
+                {
+                    "name": "Daniel Lowrey",
+                    "email": "rdlowrey@php.net"
+                },
+                {
+                    "name": "Aaron Piotrowski",
+                    "email": "aaron@trowski.com"
+                }
+            ],
+            "description": "A non-blocking concurrency framework for PHP applications.",
+            "homepage": "http://amphp.org/amp",
+            "keywords": [
+                "async",
+                "asynchronous",
+                "awaitable",
+                "concurrency",
+                "event",
+                "event-loop",
+                "future",
+                "non-blocking",
+                "promise"
+            ],
+            "time": "2018-12-11T10:31:37+00:00"
+        },
+        {
+            "name": "amphp/byte-stream",
+            "version": "v1.5.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/amphp/byte-stream.git",
+                "reference": "6bbfcb6f47e92577e739586ba0c87e867be70a23"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/amphp/byte-stream/zipball/6bbfcb6f47e92577e739586ba0c87e867be70a23",
+                "reference": "6bbfcb6f47e92577e739586ba0c87e867be70a23",
+                "shasum": ""
+            },
+            "require": {
+                "amphp/amp": "^2"
+            },
+            "require-dev": {
+                "amphp/php-cs-fixer-config": "dev-master",
+                "amphp/phpunit-util": "^1",
+                "friendsofphp/php-cs-fixer": "^2.3",
+                "infection/infection": "^0.9.3",
+                "phpunit/phpunit": "^6"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "Amp\\ByteStream\\": "lib"
+                },
+                "files": [
+                    "lib/functions.php"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Niklas Keller",
+                    "email": "me@kelunik.com"
+                },
+                {
+                    "name": "Aaron Piotrowski",
+                    "email": "aaron@trowski.com"
+                }
+            ],
+            "description": "A stream abstraction to make working with non-blocking I/O simple.",
+            "homepage": "http://amphp.org/byte-stream",
+            "keywords": [
+                "amp",
+                "amphp",
+                "async",
+                "io",
+                "non-blocking",
+                "stream"
+            ],
+            "time": "2018-12-27T18:08:06+00:00"
+        },
         {
             "name": "barryvdh/laravel-debugbar",
             "version": "v3.2.2",
@@ -7941,6 +8076,94 @@
             ],
             "time": "2018-05-16T17:37:13+00:00"
         },
+        {
+            "name": "felixfbecker/advanced-json-rpc",
+            "version": "v3.0.3",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/felixfbecker/php-advanced-json-rpc.git",
+                "reference": "241c470695366e7b83672be04ea0e64d8085a551"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/felixfbecker/php-advanced-json-rpc/zipball/241c470695366e7b83672be04ea0e64d8085a551",
+                "reference": "241c470695366e7b83672be04ea0e64d8085a551",
+                "shasum": ""
+            },
+            "require": {
+                "netresearch/jsonmapper": "^1.0",
+                "php": ">=7.0",
+                "phpdocumentor/reflection-docblock": "^4.0.0"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^6.0.0"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "AdvancedJsonRpc\\": "lib/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "ISC"
+            ],
+            "authors": [
+                {
+                    "name": "Felix Becker",
+                    "email": "felix.b@outlook.com"
+                }
+            ],
+            "description": "A more advanced JSONRPC implementation",
+            "time": "2018-09-10T08:58:41+00:00"
+        },
+        {
+            "name": "felixfbecker/language-server-protocol",
+            "version": "v1.2.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/felixfbecker/php-language-server-protocol.git",
+                "reference": "1bdd1bcc95428edf85ec04c7b558d0886c07280f"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/felixfbecker/php-language-server-protocol/zipball/1bdd1bcc95428edf85ec04c7b558d0886c07280f",
+                "reference": "1bdd1bcc95428edf85ec04c7b558d0886c07280f",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^7.0"
+            },
+            "require-dev": {
+                "phpstan/phpstan": "*",
+                "phpunit/phpunit": "^6.3",
+                "squizlabs/php_codesniffer": "^3.1"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "LanguageServerProtocol\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "ISC"
+            ],
+            "authors": [
+                {
+                    "name": "Felix Becker",
+                    "email": "felix.b@outlook.com"
+                }
+            ],
+            "description": "PHP classes for the Language Server Protocol",
+            "keywords": [
+                "language",
+                "microsoft",
+                "php",
+                "server"
+            ],
+            "time": "2018-09-25T11:42:25+00:00"
+        },
         {
             "name": "filp/whoops",
             "version": "2.3.1",
@@ -8530,6 +8753,48 @@
             ],
             "time": "2018-06-11T23:09:50+00:00"
         },
+        {
+            "name": "netresearch/jsonmapper",
+            "version": "v1.4.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/cweiske/jsonmapper.git",
+                "reference": "3868fe1128ce1169228acdb623359dca74db5ef3"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/cweiske/jsonmapper/zipball/3868fe1128ce1169228acdb623359dca74db5ef3",
+                "reference": "3868fe1128ce1169228acdb623359dca74db5ef3",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.6"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "~4.8.35 || ~5.7 || ~6.4",
+                "squizlabs/php_codesniffer": "~1.5"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-0": {
+                    "JsonMapper": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "OSL-3.0"
+            ],
+            "authors": [
+                {
+                    "name": "Christian Weiske",
+                    "email": "cweiske@cweiske.de",
+                    "homepage": "http://github.com/cweiske/jsonmapper/",
+                    "role": "Developer"
+                }
+            ],
+            "description": "Map nested JSON structures onto PHP classes",
+            "time": "2017-11-28T21:30:01+00:00"
+        },
         {
             "name": "nette/bootstrap",
             "version": "v2.4.6",
@@ -10965,32 +11230,39 @@
         },
         {
             "name": "vimeo/psalm",
-            "version": "2.0.14",
+            "version": "3.0.15",
             "source": {
                 "type": "git",
                 "url": "https://github.com/vimeo/psalm.git",
-                "reference": "792144def40d678b7fa7c8a52da6cdbd34dd415a"
+                "reference": "c310a2dd86660944b3f15fb8486ab73d45066618"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/vimeo/psalm/zipball/792144def40d678b7fa7c8a52da6cdbd34dd415a",
-                "reference": "792144def40d678b7fa7c8a52da6cdbd34dd415a",
+                "url": "https://api.github.com/repos/vimeo/psalm/zipball/c310a2dd86660944b3f15fb8486ab73d45066618",
+                "reference": "c310a2dd86660944b3f15fb8486ab73d45066618",
                 "shasum": ""
             },
             "require": {
+                "amphp/amp": "^2.1",
+                "amphp/byte-stream": "^1.5",
                 "composer/xdebug-handler": "^1.1",
+                "felixfbecker/advanced-json-rpc": "^3.0.3",
+                "felixfbecker/language-server-protocol": "^1.2",
                 "muglug/package-versions-56": "1.2.4",
-                "nikic/php-parser": "^4.0",
+                "netresearch/jsonmapper": "^1.0",
+                "nikic/php-parser": "^4.0.2 || ^4.1",
                 "openlss/lib-array2xml": "^0.0.10||^0.5.1",
                 "php": "^7.0",
-                "php-cs-fixer/diff": "^1.2"
+                "php-cs-fixer/diff": "^1.2",
+                "symfony/console": "^3.0||^4.0",
+                "webmozart/glob": "^4.1",
+                "webmozart/path-util": "^2.3"
             },
             "provide": {
                 "psalm/psalm": "self.version"
             },
             "require-dev": {
                 "bamarni/composer-bin-plugin": "^1.2",
-                "php-coveralls/php-coveralls": "^2.0",
                 "phpunit/phpunit": "^6.0 || ^7.0",
                 "squizlabs/php_codesniffer": "^3.0"
             },
@@ -10999,17 +11271,21 @@
             },
             "bin": [
                 "psalm",
-                "psalter"
+                "psalter",
+                "psalm-language-server",
+                "psalm-plugin"
             ],
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "2.x-dev",
+                    "dev-master": "3.x-dev",
+                    "dev-2.x": "2.x-dev",
                     "dev-1.x": "1.x-dev"
                 }
             },
             "autoload": {
                 "psr-4": {
+                    "Psalm\\Plugin\\": "src/Psalm/Plugin",
                     "Psalm\\": "src/Psalm"
                 }
             },
@@ -11028,7 +11304,7 @@
                 "inspection",
                 "php"
             ],
-            "time": "2018-10-10T18:22:06+00:00"
+            "time": "2019-02-11T23:39:19+00:00"
         },
         {
             "name": "webmozart/assert",
@@ -11080,6 +11356,99 @@
                 "validate"
             ],
             "time": "2018-12-25T11:19:39+00:00"
+        },
+        {
+            "name": "webmozart/glob",
+            "version": "4.1.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/webmozart/glob.git",
+                "reference": "3cbf63d4973cf9d780b93d2da8eec7e4a9e63bbe"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/webmozart/glob/zipball/3cbf63d4973cf9d780b93d2da8eec7e4a9e63bbe",
+                "reference": "3cbf63d4973cf9d780b93d2da8eec7e4a9e63bbe",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^5.3.3|^7.0",
+                "webmozart/path-util": "^2.2"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^4.6",
+                "sebastian/version": "^1.0.1",
+                "symfony/filesystem": "^2.5"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "4.1-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Webmozart\\Glob\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Bernhard Schussek",
+                    "email": "bschussek@gmail.com"
+                }
+            ],
+            "description": "A PHP implementation of Ant's glob.",
+            "time": "2015-12-29T11:14:33+00:00"
+        },
+        {
+            "name": "webmozart/path-util",
+            "version": "2.3.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/webmozart/path-util.git",
+                "reference": "d939f7edc24c9a1bb9c0dee5cb05d8e859490725"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/webmozart/path-util/zipball/d939f7edc24c9a1bb9c0dee5cb05d8e859490725",
+                "reference": "d939f7edc24c9a1bb9c0dee5cb05d8e859490725",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.3.3",
+                "webmozart/assert": "~1.0"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^4.6",
+                "sebastian/version": "^1.0.1"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "2.3-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Webmozart\\PathUtil\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Bernhard Schussek",
+                    "email": "bschussek@gmail.com"
+                }
+            ],
+            "description": "A robust cross-platform utility for normalizing, comparing and modifying file paths.",
+            "time": "2015-12-17T08:42:14+00:00"
         }
     ],
     "aliases": [],
diff --git a/psalm.xml b/psalm.xml
index b63ef4c16..210052a0e 100644
--- a/psalm.xml
+++ b/psalm.xml
@@ -97,6 +97,29 @@
         <PossiblyUndefinedMethod errorLevel="info" />
         <ReservedWord errorLevel="info" />
 
+        <RawObjectIteration errorLevel="suppress" />
+
+        <NullReference>
+            <errorLevel type="suppress">
+                <directory name="app/Http/Controllers/DAV/Backend" />
+            </errorLevel>
+        </NullReference>
+
+        <UndefinedInterfaceMethod>
+            <errorLevel type="suppress">
+                <referencedMethod name="Illuminate\Database\ConnectionInterface::getconfig" />
+                <referencedMethod name="Illuminate\Database\ConnectionInterface::getpdo" />
+                <referencedMethod name="Illuminate\Database\ConnectionInterface::getdatabasename" />
+                <referencedMethod name="Illuminate\Database\ConnectionInterface::getdrivername" />
+                <referencedMethod name="Illuminate\Database\ConnectionInterface::gettableprefix" />
+                <referencedMethod name="Illuminate\Contracts\Filesystem\Filesystem::assertmissing" />
+                <referencedMethod name="Illuminate\Contracts\Filesystem\Filesystem::assertexists" />
+                <referencedMethod name="Illuminate\Contracts\Filesystem\Filesystem::url" />
+                <referencedMethod name="Illuminate\Contracts\Filesystem\Filesystem::getdriver" />
+                <referencedMethod name="Illuminate\Contracts\Auth\Authenticatable::getemailforpasswordreset" />
+            </errorLevel>
+        </UndefinedInterfaceMethod>
+
         <UndefinedGlobalVariable>
             <errorLevel type="suppress">
                 <directory name="resources/views" />