diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8c31cc34..1b54b95f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,14 +1,26 @@
 # Change Log
 
-## Upcoming Version
+## Version 2.2 (2024-06-24)
+New features in corrector:
+- allow multiple marks for one comment if drawn with shift key pressed
+- show warnings for empty summary or diverging points in authorization dialogue
+
+Bug fixes:
 - plugin: fix uninstallation problems
-- plugin: fixed 40808: Blank pages occur when Text and PDF are submitted
+- plugin: fix 40808: Blank pages occur when Text and PDF are submitted
+- plugin: fix corrector assignment file upload error handling with required file
+- plugin: fix str_word_count on null in corrector assignment file export
+- plugin: fix wring display of correction status for corrector 1
+- plugin: fix error at correction start as admin, if object is not online
 - service: reduce size of correction PDF
 - service: fix wrong end date in PDF header
-- service: fixed removing of empty lines
-- writer: fixed paste from word with fake numbered lists
-- writer: fixed wring display of numbering on preview screen when sendings are open
-- corrector: fixed problems with loading resources and pages in safari
+- service: fix removing of empty lines
+- service: fix 41393 too large correction image size when pdf has unusual dimensions
+- service: fix showing of criteria and summary in pdf if correction is not authorized
+- writer: fix paste from word with fake numbered lists
+- writer: fix wrong display of numbering on preview screen when sendings are open
+- writer: fix showing of empty page if task description is only provided as PDF
+- corrector: fix problems with loading resources and pages in safari
 
 ## Version 2.1 (2024-05-15)
 - First published version for ILIAS 8
diff --git a/composer.lock b/composer.lock
index 52caef3d..c0a5b08c 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": "d6dcab78ef5c087d0d129636a5a8c9b6",
+    "content-hash": "8ca0c8db873446a795c2da0eda25057c",
     "packages": [
         {
             "name": "edutiek/long-essay-assessment-service",
@@ -12,12 +12,12 @@
             "source": {
                 "type": "git",
                 "url": "https://github.com/EDUTIEK/long-essay-assessment-service.git",
-                "reference": "7adaca0a757832f1f01a26625a57eac400d3ecca"
+                "reference": "71afb56bc0d0e0ab4e9214867674240a69bf12e2"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/EDUTIEK/long-essay-assessment-service/zipball/7adaca0a757832f1f01a26625a57eac400d3ecca",
-                "reference": "7adaca0a757832f1f01a26625a57eac400d3ecca",
+                "url": "https://api.github.com/repos/EDUTIEK/long-essay-assessment-service/zipball/71afb56bc0d0e0ab4e9214867674240a69bf12e2",
+                "reference": "71afb56bc0d0e0ab4e9214867674240a69bf12e2",
                 "shasum": ""
             },
             "require": {
@@ -30,7 +30,8 @@
                 "ext-xsl": "*",
                 "mustache/mustache": "^2.14",
                 "php": ">=7.4",
-                "slim/slim": "^3.11",
+                "slim/psr7": "^1.6",
+                "slim/slim": "^4.14",
                 "tecnickcom/tcpdf": "^6.3",
                 "yetanotherape/diff-match-patch": "^1.1"
             },
@@ -54,7 +55,7 @@
             "support": {
                 "source": "https://github.com/EDUTIEK/long-essay-assessment-service/tree/main"
             },
-            "time": "2024-06-04T20:16:12+00:00"
+            "time": "2024-06-21T07:52:20+00:00"
         },
         {
             "name": "edutiek/long-essay-image-sketch",
@@ -62,12 +63,12 @@
             "source": {
                 "type": "git",
                 "url": "https://github.com/EDUTIEK/long-essay-image-sketch.git",
-                "reference": "0e6597fd1d19f432dafed0c362f3e22e7e296779"
+                "reference": "3757ccb23e6a7f76378f911211308defdd929153"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/EDUTIEK/long-essay-image-sketch/zipball/0e6597fd1d19f432dafed0c362f3e22e7e296779",
-                "reference": "0e6597fd1d19f432dafed0c362f3e22e7e296779",
+                "url": "https://api.github.com/repos/EDUTIEK/long-essay-image-sketch/zipball/3757ccb23e6a7f76378f911211308defdd929153",
+                "reference": "3757ccb23e6a7f76378f911211308defdd929153",
                 "shasum": ""
             },
             "require": {
@@ -101,7 +102,7 @@
                 "source": "https://github.com/EDUTIEK/long-essay-image-sketch/tree/main",
                 "issues": "https://github.com/EDUTIEK/long-essay-image-sketch/issues"
             },
-            "time": "2024-05-24T15:22:59+00:00"
+            "time": "2024-06-18T20:08:58+00:00"
         },
         {
             "name": "edutiek/long-essay-pdf-converter",
@@ -109,12 +110,12 @@
             "source": {
                 "type": "git",
                 "url": "https://github.com/EDUTIEK/long-essay-pdf-converter.git",
-                "reference": "ec7a2c6c6f3181ec0e7f2f4f9fbdc0a29c96bcd0"
+                "reference": "0de32ccb039c6d2deb91e71577802b53c191cf0b"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/EDUTIEK/long-essay-pdf-converter/zipball/ec7a2c6c6f3181ec0e7f2f4f9fbdc0a29c96bcd0",
-                "reference": "ec7a2c6c6f3181ec0e7f2f4f9fbdc0a29c96bcd0",
+                "url": "https://api.github.com/repos/EDUTIEK/long-essay-pdf-converter/zipball/0de32ccb039c6d2deb91e71577802b53c191cf0b",
+                "reference": "0de32ccb039c6d2deb91e71577802b53c191cf0b",
                 "shasum": ""
             },
             "require": {
@@ -145,10 +146,66 @@
             ],
             "description": "Convert PDF files to images.",
             "support": {
-                "source": "https://github.com/EDUTIEK/long-essay-pdf-converter/tree/main",
+                "source": "https://github.com/EDUTIEK/long-essay-pdf-converter/tree/gs-scaling",
                 "issues": "https://github.com/EDUTIEK/long-essay-pdf-converter/issues"
             },
-            "time": "2024-04-26T11:28:30+00:00"
+            "time": "2024-06-20T15:47:41+00:00"
+        },
+        {
+            "name": "fig/http-message-util",
+            "version": "1.1.5",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/php-fig/http-message-util.git",
+                "reference": "9d94dc0154230ac39e5bf89398b324a86f63f765"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/php-fig/http-message-util/zipball/9d94dc0154230ac39e5bf89398b324a86f63f765",
+                "reference": "9d94dc0154230ac39e5bf89398b324a86f63f765",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^5.3 || ^7.0 || ^8.0"
+            },
+            "suggest": {
+                "psr/http-message": "The package containing the PSR-7 interfaces"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.1.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Fig\\Http\\Message\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "PHP-FIG",
+                    "homepage": "https://www.php-fig.org/"
+                }
+            ],
+            "description": "Utility classes and constants for use with PSR-7 (psr/http-message)",
+            "keywords": [
+                "http",
+                "http-message",
+                "psr",
+                "psr-7",
+                "request",
+                "response"
+            ],
+            "support": {
+                "issues": "https://github.com/php-fig/http-message-util/issues",
+                "source": "https://github.com/php-fig/http-message-util/tree/1.1.5"
+            },
+            "time": "2020-11-24T22:02:12+00:00"
         },
         {
             "name": "mustache/mustache",
@@ -251,35 +308,31 @@
             "time": "2018-02-13T20:26:39+00:00"
         },
         {
-            "name": "pimple/pimple",
-            "version": "v3.5.0",
+            "name": "psr/container",
+            "version": "2.0.2",
             "source": {
                 "type": "git",
-                "url": "https://github.com/silexphp/Pimple.git",
-                "reference": "a94b3a4db7fb774b3d78dad2315ddc07629e1bed"
+                "url": "https://github.com/php-fig/container.git",
+                "reference": "c71ecc56dfe541dbd90c5360474fbc405f8d5963"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/silexphp/Pimple/zipball/a94b3a4db7fb774b3d78dad2315ddc07629e1bed",
-                "reference": "a94b3a4db7fb774b3d78dad2315ddc07629e1bed",
+                "url": "https://api.github.com/repos/php-fig/container/zipball/c71ecc56dfe541dbd90c5360474fbc405f8d5963",
+                "reference": "c71ecc56dfe541dbd90c5360474fbc405f8d5963",
                 "shasum": ""
             },
             "require": {
-                "php": ">=7.2.5",
-                "psr/container": "^1.1 || ^2.0"
-            },
-            "require-dev": {
-                "symfony/phpunit-bridge": "^5.4@dev"
+                "php": ">=7.4.0"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "3.4.x-dev"
+                    "dev-master": "2.0.x-dev"
                 }
             },
             "autoload": {
-                "psr-0": {
-                    "Pimple": "src/"
+                "psr-4": {
+                    "Psr\\Container\\": "src/"
                 }
             },
             "notification-url": "https://packagist.org/downloads/",
@@ -288,42 +341,52 @@
             ],
             "authors": [
                 {
-                    "name": "Fabien Potencier",
-                    "email": "fabien@symfony.com"
+                    "name": "PHP-FIG",
+                    "homepage": "https://www.php-fig.org/"
                 }
             ],
-            "description": "Pimple, a simple Dependency Injection Container",
-            "homepage": "https://pimple.symfony.com",
+            "description": "Common Container Interface (PHP FIG PSR-11)",
+            "homepage": "https://github.com/php-fig/container",
             "keywords": [
+                "PSR-11",
                 "container",
-                "dependency injection"
+                "container-interface",
+                "container-interop",
+                "psr"
             ],
             "support": {
-                "source": "https://github.com/silexphp/Pimple/tree/v3.5.0"
+                "issues": "https://github.com/php-fig/container/issues",
+                "source": "https://github.com/php-fig/container/tree/2.0.2"
             },
-            "time": "2021-10-28T11:13:42+00:00"
+            "time": "2021-11-05T16:47:00+00:00"
         },
         {
-            "name": "psr/container",
-            "version": "1.1.2",
+            "name": "psr/http-factory",
+            "version": "1.1.0",
             "source": {
                 "type": "git",
-                "url": "https://github.com/php-fig/container.git",
-                "reference": "513e0666f7216c7459170d56df27dfcefe1689ea"
+                "url": "https://github.com/php-fig/http-factory.git",
+                "reference": "2b4765fddfe3b508ac62f829e852b1501d3f6e8a"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/php-fig/container/zipball/513e0666f7216c7459170d56df27dfcefe1689ea",
-                "reference": "513e0666f7216c7459170d56df27dfcefe1689ea",
+                "url": "https://api.github.com/repos/php-fig/http-factory/zipball/2b4765fddfe3b508ac62f829e852b1501d3f6e8a",
+                "reference": "2b4765fddfe3b508ac62f829e852b1501d3f6e8a",
                 "shasum": ""
             },
             "require": {
-                "php": ">=7.4.0"
+                "php": ">=7.1",
+                "psr/http-message": "^1.0 || ^2.0"
             },
             "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.0.x-dev"
+                }
+            },
             "autoload": {
                 "psr-4": {
-                    "Psr\\Container\\": "src/"
+                    "Psr\\Http\\Message\\": "src/"
                 }
             },
             "notification-url": "https://packagist.org/downloads/",
@@ -336,33 +399,34 @@
                     "homepage": "https://www.php-fig.org/"
                 }
             ],
-            "description": "Common Container Interface (PHP FIG PSR-11)",
-            "homepage": "https://github.com/php-fig/container",
+            "description": "PSR-17: Common interfaces for PSR-7 HTTP message factories",
             "keywords": [
-                "PSR-11",
-                "container",
-                "container-interface",
-                "container-interop",
-                "psr"
+                "factory",
+                "http",
+                "message",
+                "psr",
+                "psr-17",
+                "psr-7",
+                "request",
+                "response"
             ],
             "support": {
-                "issues": "https://github.com/php-fig/container/issues",
-                "source": "https://github.com/php-fig/container/tree/1.1.2"
+                "source": "https://github.com/php-fig/http-factory"
             },
-            "time": "2021-11-05T16:50:12+00:00"
+            "time": "2024-04-15T12:06:14+00:00"
         },
         {
             "name": "psr/http-message",
-            "version": "1.1",
+            "version": "2.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/php-fig/http-message.git",
-                "reference": "cb6ce4845ce34a8ad9e68117c10ee90a29919eba"
+                "reference": "402d35bcb92c70c026d1a6a9883f06b2ead23d71"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/php-fig/http-message/zipball/cb6ce4845ce34a8ad9e68117c10ee90a29919eba",
-                "reference": "cb6ce4845ce34a8ad9e68117c10ee90a29919eba",
+                "url": "https://api.github.com/repos/php-fig/http-message/zipball/402d35bcb92c70c026d1a6a9883f06b2ead23d71",
+                "reference": "402d35bcb92c70c026d1a6a9883f06b2ead23d71",
                 "shasum": ""
             },
             "require": {
@@ -371,7 +435,7 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "1.1.x-dev"
+                    "dev-master": "2.0.x-dev"
                 }
             },
             "autoload": {
@@ -386,7 +450,7 @@
             "authors": [
                 {
                     "name": "PHP-FIG",
-                    "homepage": "http://www.php-fig.org/"
+                    "homepage": "https://www.php-fig.org/"
                 }
             ],
             "description": "Common interface for HTTP messages",
@@ -400,40 +464,347 @@
                 "response"
             ],
             "support": {
-                "source": "https://github.com/php-fig/http-message/tree/1.1"
+                "source": "https://github.com/php-fig/http-message/tree/2.0"
+            },
+            "time": "2023-04-04T09:54:51+00:00"
+        },
+        {
+            "name": "psr/http-server-handler",
+            "version": "1.0.2",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/php-fig/http-server-handler.git",
+                "reference": "84c4fb66179be4caaf8e97bd239203245302e7d4"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/php-fig/http-server-handler/zipball/84c4fb66179be4caaf8e97bd239203245302e7d4",
+                "reference": "84c4fb66179be4caaf8e97bd239203245302e7d4",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=7.0",
+                "psr/http-message": "^1.0 || ^2.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.0.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Psr\\Http\\Server\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "PHP-FIG",
+                    "homepage": "https://www.php-fig.org/"
+                }
+            ],
+            "description": "Common interface for HTTP server-side request handler",
+            "keywords": [
+                "handler",
+                "http",
+                "http-interop",
+                "psr",
+                "psr-15",
+                "psr-7",
+                "request",
+                "response",
+                "server"
+            ],
+            "support": {
+                "source": "https://github.com/php-fig/http-server-handler/tree/1.0.2"
+            },
+            "time": "2023-04-10T20:06:20+00:00"
+        },
+        {
+            "name": "psr/http-server-middleware",
+            "version": "1.0.2",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/php-fig/http-server-middleware.git",
+                "reference": "c1481f747daaa6a0782775cd6a8c26a1bf4a3829"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/php-fig/http-server-middleware/zipball/c1481f747daaa6a0782775cd6a8c26a1bf4a3829",
+                "reference": "c1481f747daaa6a0782775cd6a8c26a1bf4a3829",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=7.0",
+                "psr/http-message": "^1.0 || ^2.0",
+                "psr/http-server-handler": "^1.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.0.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Psr\\Http\\Server\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "PHP-FIG",
+                    "homepage": "https://www.php-fig.org/"
+                }
+            ],
+            "description": "Common interface for HTTP server-side middleware",
+            "keywords": [
+                "http",
+                "http-interop",
+                "middleware",
+                "psr",
+                "psr-15",
+                "psr-7",
+                "request",
+                "response"
+            ],
+            "support": {
+                "issues": "https://github.com/php-fig/http-server-middleware/issues",
+                "source": "https://github.com/php-fig/http-server-middleware/tree/1.0.2"
             },
-            "time": "2023-04-04T09:50:52+00:00"
+            "time": "2023-04-11T06:14:47+00:00"
+        },
+        {
+            "name": "psr/log",
+            "version": "3.0.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/php-fig/log.git",
+                "reference": "fe5ea303b0887d5caefd3d431c3e61ad47037001"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/php-fig/log/zipball/fe5ea303b0887d5caefd3d431c3e61ad47037001",
+                "reference": "fe5ea303b0887d5caefd3d431c3e61ad47037001",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=8.0.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "3.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Psr\\Log\\": "src"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "PHP-FIG",
+                    "homepage": "https://www.php-fig.org/"
+                }
+            ],
+            "description": "Common interface for logging libraries",
+            "homepage": "https://github.com/php-fig/log",
+            "keywords": [
+                "log",
+                "psr",
+                "psr-3"
+            ],
+            "support": {
+                "source": "https://github.com/php-fig/log/tree/3.0.0"
+            },
+            "time": "2021-07-14T16:46:02+00:00"
+        },
+        {
+            "name": "ralouphie/getallheaders",
+            "version": "3.0.3",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/ralouphie/getallheaders.git",
+                "reference": "120b605dfeb996808c31b6477290a714d356e822"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/ralouphie/getallheaders/zipball/120b605dfeb996808c31b6477290a714d356e822",
+                "reference": "120b605dfeb996808c31b6477290a714d356e822",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.6"
+            },
+            "require-dev": {
+                "php-coveralls/php-coveralls": "^2.1",
+                "phpunit/phpunit": "^5 || ^6.5"
+            },
+            "type": "library",
+            "autoload": {
+                "files": [
+                    "src/getallheaders.php"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Ralph Khattar",
+                    "email": "ralph.khattar@gmail.com"
+                }
+            ],
+            "description": "A polyfill for getallheaders.",
+            "support": {
+                "issues": "https://github.com/ralouphie/getallheaders/issues",
+                "source": "https://github.com/ralouphie/getallheaders/tree/develop"
+            },
+            "time": "2019-03-08T08:55:37+00:00"
+        },
+        {
+            "name": "slim/psr7",
+            "version": "1.7.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/slimphp/Slim-Psr7.git",
+                "reference": "753e9646def5ff4db1a06e5cf4ef539bfd30f467"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/slimphp/Slim-Psr7/zipball/753e9646def5ff4db1a06e5cf4ef539bfd30f467",
+                "reference": "753e9646def5ff4db1a06e5cf4ef539bfd30f467",
+                "shasum": ""
+            },
+            "require": {
+                "fig/http-message-util": "^1.1.5",
+                "php": "^8.0",
+                "psr/http-factory": "^1.1",
+                "psr/http-message": "^1.0 || ^2.0",
+                "ralouphie/getallheaders": "^3.0",
+                "symfony/polyfill-php80": "^1.29"
+            },
+            "provide": {
+                "psr/http-factory-implementation": "^1.0",
+                "psr/http-message-implementation": "^1.0 || ^2.0"
+            },
+            "require-dev": {
+                "adriansuter/php-autoload-override": "^1.4",
+                "ext-json": "*",
+                "http-interop/http-factory-tests": "^1.1.0",
+                "php-http/psr7-integration-tests": "1.3.0",
+                "phpspec/prophecy": "^1.19",
+                "phpspec/prophecy-phpunit": "^2.2",
+                "phpstan/phpstan": "^1.11",
+                "phpunit/phpunit": "^9.6",
+                "squizlabs/php_codesniffer": "^3.10"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "Slim\\Psr7\\": "src"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Josh Lockhart",
+                    "email": "hello@joshlockhart.com",
+                    "homepage": "http://joshlockhart.com"
+                },
+                {
+                    "name": "Andrew Smith",
+                    "email": "a.smith@silentworks.co.uk",
+                    "homepage": "http://silentworks.co.uk"
+                },
+                {
+                    "name": "Rob Allen",
+                    "email": "rob@akrabat.com",
+                    "homepage": "http://akrabat.com"
+                },
+                {
+                    "name": "Pierre Berube",
+                    "email": "pierre@lgse.com",
+                    "homepage": "http://www.lgse.com"
+                }
+            ],
+            "description": "Strict PSR-7 implementation",
+            "homepage": "https://www.slimframework.com",
+            "keywords": [
+                "http",
+                "psr-7",
+                "psr7"
+            ],
+            "support": {
+                "issues": "https://github.com/slimphp/Slim-Psr7/issues",
+                "source": "https://github.com/slimphp/Slim-Psr7/tree/1.7.0"
+            },
+            "time": "2024-06-08T14:48:17+00:00"
         },
         {
             "name": "slim/slim",
-            "version": "3.12.5",
+            "version": "4.14.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/slimphp/Slim.git",
-                "reference": "565632b2d9b64ecedf89546edbbf4f3648089f0c"
+                "reference": "5943393b88716eb9e82c4161caa956af63423913"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/slimphp/Slim/zipball/565632b2d9b64ecedf89546edbbf4f3648089f0c",
-                "reference": "565632b2d9b64ecedf89546edbbf4f3648089f0c",
+                "url": "https://api.github.com/repos/slimphp/Slim/zipball/5943393b88716eb9e82c4161caa956af63423913",
+                "reference": "5943393b88716eb9e82c4161caa956af63423913",
                 "shasum": ""
             },
             "require": {
                 "ext-json": "*",
-                "ext-libxml": "*",
-                "ext-simplexml": "*",
-                "nikic/fast-route": "^1.0",
-                "php": ">=5.5.0",
-                "pimple/pimple": "^3.0",
-                "psr/container": "^1.0",
-                "psr/http-message": "^1.0"
-            },
-            "provide": {
-                "psr/http-message-implementation": "1.0"
+                "nikic/fast-route": "^1.3",
+                "php": "^7.4 || ^8.0",
+                "psr/container": "^1.0 || ^2.0",
+                "psr/http-factory": "^1.1",
+                "psr/http-message": "^1.1 || ^2.0",
+                "psr/http-server-handler": "^1.0",
+                "psr/http-server-middleware": "^1.0",
+                "psr/log": "^1.1 || ^2.0 || ^3.0"
             },
             "require-dev": {
-                "phpunit/phpunit": "^4.0",
-                "squizlabs/php_codesniffer": "^3.6.0"
+                "adriansuter/php-autoload-override": "^1.4",
+                "ext-simplexml": "*",
+                "guzzlehttp/psr7": "^2.6",
+                "httpsoft/http-message": "^1.1",
+                "httpsoft/http-server-request": "^1.1",
+                "laminas/laminas-diactoros": "^2.17 || ^3",
+                "nyholm/psr7": "^1.8",
+                "nyholm/psr7-server": "^1.1",
+                "phpspec/prophecy": "^1.19",
+                "phpspec/prophecy-phpunit": "^2.1",
+                "phpstan/phpstan": "^1.11",
+                "phpunit/phpunit": "^9.6",
+                "slim/http": "^1.3",
+                "slim/psr7": "^1.6",
+                "squizlabs/php_codesniffer": "^3.10",
+                "vimeo/psalm": "^5.24"
+            },
+            "suggest": {
+                "ext-simplexml": "Needed to support XML format in BodyParsingMiddleware",
+                "ext-xml": "Needed to support XML format in BodyParsingMiddleware",
+                "php-di/php-di": "PHP-DI is the recommended container library to be used with Slim",
+                "slim/psr7": "Slim PSR-7 implementation. See https://www.slimframework.com/docs/v4/start/installation.html for more information."
             },
             "type": "library",
             "autoload": {
@@ -461,6 +832,11 @@
                     "email": "rob@akrabat.com",
                     "homepage": "http://akrabat.com"
                 },
+                {
+                    "name": "Pierre Berube",
+                    "email": "pierre@lgse.com",
+                    "homepage": "http://www.lgse.com"
+                },
                 {
                     "name": "Gabriel Manricks",
                     "email": "gmanricks@me.com",
@@ -468,7 +844,7 @@
                 }
             ],
             "description": "Slim is a PHP micro framework that helps you quickly write simple yet powerful web applications and APIs",
-            "homepage": "https://slimframework.com",
+            "homepage": "https://www.slimframework.com",
             "keywords": [
                 "api",
                 "framework",
@@ -476,8 +852,14 @@
                 "router"
             ],
             "support": {
+                "docs": "https://www.slimframework.com/docs/v4/",
+                "forum": "https://discourse.slimframework.com/",
+                "irc": "irc://irc.freenode.net:6667/slimphp",
                 "issues": "https://github.com/slimphp/Slim/issues",
-                "source": "https://github.com/slimphp/Slim/tree/3.12.5"
+                "rss": "https://www.slimframework.com/blog/feed.rss",
+                "slack": "https://slimphp.slack.com/",
+                "source": "https://github.com/slimphp/Slim",
+                "wiki": "https://github.com/slimphp/Slim/wiki"
             },
             "funding": [
                 {
@@ -489,7 +871,87 @@
                     "type": "tidelift"
                 }
             ],
-            "time": "2023-07-23T04:32:51+00:00"
+            "time": "2024-06-13T08:54:48+00:00"
+        },
+        {
+            "name": "symfony/polyfill-php80",
+            "version": "v1.30.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/symfony/polyfill-php80.git",
+                "reference": "77fa7995ac1b21ab60769b7323d600a991a90433"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/symfony/polyfill-php80/zipball/77fa7995ac1b21ab60769b7323d600a991a90433",
+                "reference": "77fa7995ac1b21ab60769b7323d600a991a90433",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=7.1"
+            },
+            "type": "library",
+            "extra": {
+                "thanks": {
+                    "name": "symfony/polyfill",
+                    "url": "https://github.com/symfony/polyfill"
+                }
+            },
+            "autoload": {
+                "files": [
+                    "bootstrap.php"
+                ],
+                "psr-4": {
+                    "Symfony\\Polyfill\\Php80\\": ""
+                },
+                "classmap": [
+                    "Resources/stubs"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Ion Bazan",
+                    "email": "ion.bazan@gmail.com"
+                },
+                {
+                    "name": "Nicolas Grekas",
+                    "email": "p@tchwork.com"
+                },
+                {
+                    "name": "Symfony Community",
+                    "homepage": "https://symfony.com/contributors"
+                }
+            ],
+            "description": "Symfony polyfill backporting some PHP 8.0+ features to lower PHP versions",
+            "homepage": "https://symfony.com",
+            "keywords": [
+                "compatibility",
+                "polyfill",
+                "portable",
+                "shim"
+            ],
+            "support": {
+                "source": "https://github.com/symfony/polyfill-php80/tree/v1.30.0"
+            },
+            "funding": [
+                {
+                    "url": "https://symfony.com/sponsor",
+                    "type": "custom"
+                },
+                {
+                    "url": "https://github.com/fabpot",
+                    "type": "github"
+                },
+                {
+                    "url": "https://tidelift.com/funding/github/packagist/symfony/symfony",
+                    "type": "tidelift"
+                }
+            ],
+            "time": "2024-05-31T15:07:36+00:00"
         },
         {
             "name": "tecnickcom/tcpdf",
diff --git a/docs/EDUTIEK-Anleitung.pdf b/docs/EDUTIEK-Anleitung.pdf
index 6efbe795..c7b79683 100644
Binary files a/docs/EDUTIEK-Anleitung.pdf and b/docs/EDUTIEK-Anleitung.pdf differ
diff --git a/plugin.php b/plugin.php
index b4b94ba3..23391a8c 100644
--- a/plugin.php
+++ b/plugin.php
@@ -5,7 +5,7 @@
 $id = 'xlas';
 
 // code version; must be changed for all code changes
-$version = '2.1';
+$version = '2.2';
 // ilias min and max version; must always reflect the versions that should
 // run with the plugin
 $ilias_min_version = '8.11';