diff --git a/Code/Module/Cloud.php b/Code/Module/Cloud.php
index 728a3dc67..937f49fc8 100644
--- a/Code/Module/Cloud.php
+++ b/Code/Module/Cloud.php
@@ -115,7 +115,7 @@ class Cloud extends Controller
 
         // All we need to do now, is to fire up the server
 
-        $server->exec();
+        $server->start();
 
         if ($browser->build_page) {
             construct_page();
diff --git a/Code/Module/Dav.php b/Code/Module/Dav.php
index 53960fdee..7a1f419fc 100644
--- a/Code/Module/Dav.php
+++ b/Code/Module/Dav.php
@@ -137,7 +137,7 @@ class Dav extends Controller
         // $server->addPlugin(new \Code\Storage\QuotaPlugin($auth));
 
         // All we need to do now, is to fire up the server
-        $server->exec();
+        $server->start();
 
         killme();
     }
diff --git a/composer.json b/composer.json
index 140f1901d..e2a85138e 100644
--- a/composer.json
+++ b/composer.json
@@ -19,7 +19,7 @@
         "ext-mbstring": "*",
         "ext-xml": "*",
         "ext-openssl": "*",
-        "sabre/dav": "~3.2",
+        "sabre/dav": "^4.0",
         "michelf/php-markdown": "^1.7",
         "bshaffer/oauth2-server-php": "^1.9",
         "ezyang/htmlpurifier": "^4.9",
diff --git a/composer.lock b/composer.lock
index 5a9f06257..747cdcc75 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "09b4e6730c53f30b4f878886a1467f44",
+    "content-hash": "d8b5e558619884faf6d616be3846e758",
     "packages": [
         {
             "name": "beberlei/assert",
@@ -3483,30 +3483,30 @@
         },
         {
             "name": "psr/log",
-            "version": "1.1.4",
+            "version": "2.0.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/php-fig/log.git",
-                "reference": "d49695b909c3b7628b6289db5479a1c204601f11"
+                "reference": "ef29f6d262798707a9edd554e2b82517ef3a9376"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/php-fig/log/zipball/d49695b909c3b7628b6289db5479a1c204601f11",
-                "reference": "d49695b909c3b7628b6289db5479a1c204601f11",
+                "url": "https://api.github.com/repos/php-fig/log/zipball/ef29f6d262798707a9edd554e2b82517ef3a9376",
+                "reference": "ef29f6d262798707a9edd554e2b82517ef3a9376",
                 "shasum": ""
             },
             "require": {
-                "php": ">=5.3.0"
+                "php": ">=8.0.0"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "1.1.x-dev"
+                    "dev-master": "2.0.x-dev"
                 }
             },
             "autoload": {
                 "psr-4": {
-                    "Psr\\Log\\": "Psr/Log/"
+                    "Psr\\Log\\": "src"
                 }
             },
             "notification-url": "https://packagist.org/downloads/",
@@ -3527,9 +3527,9 @@
                 "psr-3"
             ],
             "support": {
-                "source": "https://github.com/php-fig/log/tree/1.1.4"
+                "source": "https://github.com/php-fig/log/tree/2.0.0"
             },
-            "time": "2021-05-03T11:20:27+00:00"
+            "time": "2021-07-14T16:41:46+00:00"
         },
         {
             "name": "ralouphie/getallheaders",
@@ -3677,16 +3677,16 @@
         },
         {
             "name": "sabre/dav",
-            "version": "3.2.3",
+            "version": "4.6.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sabre-io/dav.git",
-                "reference": "a9780ce4f35560ecbd0af524ad32d9d2c8954b80"
+                "reference": "554145304b4a026477d130928d16e626939b0b2a"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/sabre-io/dav/zipball/a9780ce4f35560ecbd0af524ad32d9d2c8954b80",
-                "reference": "a9780ce4f35560ecbd0af524ad32d9d2c8954b80",
+                "url": "https://api.github.com/repos/sabre-io/dav/zipball/554145304b4a026477d130928d16e626939b0b2a",
+                "reference": "554145304b4a026477d130928d16e626939b0b2a",
                 "shasum": ""
             },
             "require": {
@@ -3694,27 +3694,30 @@
                 "ext-date": "*",
                 "ext-dom": "*",
                 "ext-iconv": "*",
+                "ext-json": "*",
                 "ext-mbstring": "*",
                 "ext-pcre": "*",
                 "ext-simplexml": "*",
                 "ext-spl": "*",
                 "lib-libxml": ">=2.7.0",
-                "php": ">=5.5.0",
-                "psr/log": "^1.0",
-                "sabre/event": ">=2.0.0, <4.0.0",
-                "sabre/http": "^4.2.1",
-                "sabre/uri": "^1.0.1",
-                "sabre/vobject": "^4.1.0",
-                "sabre/xml": "^1.4.0"
+                "php": "^7.1.0 || ^8.0",
+                "psr/log": "^1.0 || ^2.0 || ^3.0",
+                "sabre/event": "^5.0",
+                "sabre/http": "^5.0.5",
+                "sabre/uri": "^2.0",
+                "sabre/vobject": "^4.2.1",
+                "sabre/xml": "^2.0.1"
             },
             "require-dev": {
-                "evert/phpdoc-md": "~0.1.0",
-                "monolog/monolog": "^1.18",
-                "phpunit/phpunit": "> 4.8, <6.0.0",
-                "sabre/cs": "^1.0.0"
+                "friendsofphp/php-cs-fixer": "^2.19",
+                "monolog/monolog": "^1.27 || ^2.0",
+                "phpstan/phpstan": "^0.12 || ^1.0",
+                "phpstan/phpstan-phpunit": "^1.0",
+                "phpunit/phpunit": "^7.5 || ^8.5 || ^9.6"
             },
             "suggest": {
                 "ext-curl": "*",
+                "ext-imap": "*",
                 "ext-pdo": "*"
             },
             "bin": [
@@ -3722,17 +3725,9 @@
                 "bin/naturalselection"
             ],
             "type": "library",
-            "extra": {
-                "branch-alias": {
-                    "dev-master": "3.1.0-dev"
-                }
-            },
             "autoload": {
                 "psr-4": {
-                    "Sabre\\DAV\\": "lib/DAV/",
-                    "Sabre\\CalDAV\\": "lib/CalDAV/",
-                    "Sabre\\DAVACL\\": "lib/DAVACL/",
-                    "Sabre\\CardDAV\\": "lib/CardDAV/"
+                    "Sabre\\": "lib/"
                 }
             },
             "notification-url": "https://packagist.org/downloads/",
@@ -3761,28 +3756,29 @@
                 "issues": "https://github.com/sabre-io/dav/issues",
                 "source": "https://github.com/fruux/sabre-dav"
             },
-            "time": "2018-10-19T09:58:27+00:00"
+            "time": "2023-12-11T13:01:23+00:00"
         },
         {
             "name": "sabre/event",
-            "version": "3.0.0",
+            "version": "5.1.4",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sabre-io/event.git",
-                "reference": "831d586f5a442dceacdcf5e9c4c36a4db99a3534"
+                "reference": "d7da22897125d34d7eddf7977758191c06a74497"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/sabre-io/event/zipball/831d586f5a442dceacdcf5e9c4c36a4db99a3534",
-                "reference": "831d586f5a442dceacdcf5e9c4c36a4db99a3534",
+                "url": "https://api.github.com/repos/sabre-io/event/zipball/d7da22897125d34d7eddf7977758191c06a74497",
+                "reference": "d7da22897125d34d7eddf7977758191c06a74497",
                 "shasum": ""
             },
             "require": {
-                "php": ">=5.5"
+                "php": "^7.1 || ^8.0"
             },
             "require-dev": {
-                "phpunit/phpunit": "*",
-                "sabre/cs": "~0.0.4"
+                "friendsofphp/php-cs-fixer": "~2.17.1",
+                "phpstan/phpstan": "^0.12",
+                "phpunit/phpunit": "^7.5 || ^8.5 || ^9.0"
             },
             "type": "library",
             "autoload": {
@@ -3812,10 +3808,13 @@
             "keywords": [
                 "EventEmitter",
                 "async",
+                "coroutine",
+                "eventloop",
                 "events",
                 "hooks",
                 "plugin",
                 "promise",
+                "reactor",
                 "signal"
             ],
             "support": {
@@ -3823,32 +3822,34 @@
                 "issues": "https://github.com/sabre-io/event/issues",
                 "source": "https://github.com/fruux/sabre-event"
             },
-            "time": "2015-11-05T20:14:39+00:00"
+            "time": "2021-11-04T06:51:17+00:00"
         },
         {
             "name": "sabre/http",
-            "version": "v4.2.4",
+            "version": "5.1.10",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sabre-io/http.git",
-                "reference": "acccec4ba863959b2d10c1fa0fb902736c5c8956"
+                "reference": "f9f3d1fba8916fa2f4ec25636c4fedc26cb94e02"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/sabre-io/http/zipball/acccec4ba863959b2d10c1fa0fb902736c5c8956",
-                "reference": "acccec4ba863959b2d10c1fa0fb902736c5c8956",
+                "url": "https://api.github.com/repos/sabre-io/http/zipball/f9f3d1fba8916fa2f4ec25636c4fedc26cb94e02",
+                "reference": "f9f3d1fba8916fa2f4ec25636c4fedc26cb94e02",
                 "shasum": ""
             },
             "require": {
                 "ext-ctype": "*",
+                "ext-curl": "*",
                 "ext-mbstring": "*",
-                "php": ">=5.4",
-                "sabre/event": ">=1.0.0,<4.0.0",
-                "sabre/uri": "~1.0"
+                "php": "^7.1 || ^8.0",
+                "sabre/event": ">=4.0 <6.0",
+                "sabre/uri": "^2.0"
             },
             "require-dev": {
-                "phpunit/phpunit": "~4.3",
-                "sabre/cs": "~0.0.1"
+                "friendsofphp/php-cs-fixer": "~2.17.1",
+                "phpstan/phpstan": "^0.12",
+                "phpunit/phpunit": "^7.5 || ^8.5 || ^9.0"
             },
             "suggest": {
                 "ext-curl": " to make http requests with the Client class"
@@ -3884,28 +3885,32 @@
                 "issues": "https://github.com/sabre-io/http/issues",
                 "source": "https://github.com/fruux/sabre-http"
             },
-            "time": "2018-02-23T11:10:29+00:00"
+            "time": "2023-08-18T01:55:28+00:00"
         },
         {
             "name": "sabre/uri",
-            "version": "1.2.1",
+            "version": "2.3.3",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sabre-io/uri.git",
-                "reference": "ada354d83579565949d80b2e15593c2371225e61"
+                "reference": "7e0e7dfd0b7e14346a27eabd66e843a6e7f1812b"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/sabre-io/uri/zipball/ada354d83579565949d80b2e15593c2371225e61",
-                "reference": "ada354d83579565949d80b2e15593c2371225e61",
+                "url": "https://api.github.com/repos/sabre-io/uri/zipball/7e0e7dfd0b7e14346a27eabd66e843a6e7f1812b",
+                "reference": "7e0e7dfd0b7e14346a27eabd66e843a6e7f1812b",
                 "shasum": ""
             },
             "require": {
-                "php": ">=5.4.7"
+                "php": "^7.4 || ^8.0"
             },
             "require-dev": {
-                "phpunit/phpunit": ">=4.0,<6.0",
-                "sabre/cs": "~1.0.0"
+                "friendsofphp/php-cs-fixer": "^3.17",
+                "phpstan/extension-installer": "^1.3",
+                "phpstan/phpstan": "^1.10",
+                "phpstan/phpstan-phpunit": "^1.3",
+                "phpstan/phpstan-strict-rules": "^1.5",
+                "phpunit/phpunit": "^9.6"
             },
             "type": "library",
             "autoload": {
@@ -3940,29 +3945,32 @@
                 "issues": "https://github.com/sabre-io/uri/issues",
                 "source": "https://github.com/fruux/sabre-uri"
             },
-            "time": "2017-02-20T19:59:28+00:00"
+            "time": "2023-06-09T06:54:04+00:00"
         },
         {
             "name": "sabre/vobject",
-            "version": "4.2.2",
+            "version": "4.5.4",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sabre-io/vobject.git",
-                "reference": "449616b2d45b95c8973975de23f34a3d14f63b4b"
+                "reference": "a6d53a3e5bec85ed3dd78868b7de0f5b4e12f772"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/sabre-io/vobject/zipball/449616b2d45b95c8973975de23f34a3d14f63b4b",
-                "reference": "449616b2d45b95c8973975de23f34a3d14f63b4b",
+                "url": "https://api.github.com/repos/sabre-io/vobject/zipball/a6d53a3e5bec85ed3dd78868b7de0f5b4e12f772",
+                "reference": "a6d53a3e5bec85ed3dd78868b7de0f5b4e12f772",
                 "shasum": ""
             },
             "require": {
                 "ext-mbstring": "*",
-                "php": ">=5.5",
-                "sabre/xml": ">=1.5 <3.0"
+                "php": "^7.1 || ^8.0",
+                "sabre/xml": "^2.1 || ^3.0 || ^4.0"
             },
             "require-dev": {
-                "phpunit/phpunit": "> 4.8.35, <6.0.0"
+                "friendsofphp/php-cs-fixer": "~2.17.1",
+                "phpstan/phpstan": "^0.12",
+                "phpunit/php-invoker": "^2.0 || ^3.1",
+                "phpunit/phpunit": "^7.5 || ^8.5 || ^9.0"
             },
             "suggest": {
                 "hoa/bench": "If you would like to run the benchmark scripts"
@@ -4041,20 +4049,20 @@
                 "issues": "https://github.com/sabre-io/vobject/issues",
                 "source": "https://github.com/fruux/sabre-vobject"
             },
-            "time": "2020-01-14T10:18:45+00:00"
+            "time": "2023-11-09T12:54:37+00:00"
         },
         {
             "name": "sabre/xml",
-            "version": "1.5.1",
+            "version": "2.2.6",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sabre-io/xml.git",
-                "reference": "a367665f1df614c3b8fefc30a54de7cd295e444e"
+                "reference": "9cde7cdab1e50893cc83b037b40cd47bfde42a2b"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/sabre-io/xml/zipball/a367665f1df614c3b8fefc30a54de7cd295e444e",
-                "reference": "a367665f1df614c3b8fefc30a54de7cd295e444e",
+                "url": "https://api.github.com/repos/sabre-io/xml/zipball/9cde7cdab1e50893cc83b037b40cd47bfde42a2b",
+                "reference": "9cde7cdab1e50893cc83b037b40cd47bfde42a2b",
                 "shasum": ""
             },
             "require": {
@@ -4062,12 +4070,13 @@
                 "ext-xmlreader": "*",
                 "ext-xmlwriter": "*",
                 "lib-libxml": ">=2.6.20",
-                "php": ">=5.5.5",
+                "php": "^7.1 || ^8.0",
                 "sabre/uri": ">=1.0,<3.0.0"
             },
             "require-dev": {
-                "phpunit/phpunit": "~4.8|~5.7",
-                "sabre/cs": "~1.0.0"
+                "friendsofphp/php-cs-fixer": "~2.17.1",
+                "phpstan/phpstan": "^0.12",
+                "phpunit/phpunit": "^7.5 || ^8.5 || ^9.0"
             },
             "type": "library",
             "autoload": {
@@ -4109,7 +4118,7 @@
                 "issues": "https://github.com/sabre-io/xml/issues",
                 "source": "https://github.com/fruux/sabre-xml"
             },
-            "time": "2019-01-09T13:51:57+00:00"
+            "time": "2023-06-28T12:56:05+00:00"
         },
         {
             "name": "simshaun/recurr",