diff --git a/.github/workflows/continuous-integration.yml b/.github/workflows/continuous-integration.yml
index d1ebad6..9ac92fe 100644
--- a/.github/workflows/continuous-integration.yml
+++ b/.github/workflows/continuous-integration.yml
@@ -20,7 +20,7 @@ jobs:
     name: "Generate CI matrix"
     uses: "glpi-project/plugin-ci-workflows/.github/workflows/generate-ci-matrix.yml@v1"
     with:
-      glpi-version: "11.0.x"
+      glpi-version: "12.0.x"
   ci:
     name: "GLPI ${{ matrix.glpi-version }} - php:${{ matrix.php-version }} - ${{ matrix.db-image }}"
     needs: "generate-ci-matrix"
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5ec378a..44d1208 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,7 +5,11 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/)
 and this project adheres to [Semantic Versioning](http://semver.org/).
 
-## Unreleased ##
+## [UNRELEASED]
+
+### Added
+
+- GLPI 12 compatibility
 
 ### Fixed
 
diff --git a/composer.json b/composer.json
index 8b1e015..5881de2 100644
--- a/composer.json
+++ b/composer.json
@@ -2,9 +2,6 @@
     "require": {
         "php": ">=8.2"
     },
-    "require-dev": {
-        "glpi-project/tools": "^0.8"
-    },
     "config": {
         "optimize-autoloader": true,
         "platform": {
diff --git a/composer.lock b/composer.lock
index de968a4..e798ec8 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,880 +4,9 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "0bb7734a8837cdd118f20d259d3613e7",
+    "content-hash": "4cacb822b12bf0d2a0dbcf952b20ef7b",
     "packages": [],
-    "packages-dev": [
-        {
-            "name": "glpi-project/tools",
-            "version": "0.8.3",
-            "source": {
-                "type": "git",
-                "url": "https://github.com/glpi-project/tools.git",
-                "reference": "8ea2a7d4702a858f4b0360ba7d4f1841a5e77026"
-            },
-            "dist": {
-                "type": "zip",
-                "url": "https://api.github.com/repos/glpi-project/tools/zipball/8ea2a7d4702a858f4b0360ba7d4f1841a5e77026",
-                "reference": "8ea2a7d4702a858f4b0360ba7d4f1841a5e77026",
-                "shasum": ""
-            },
-            "require": {
-                "symfony/console": "^5.4 || ^6.0",
-                "twig/twig": "^3.3"
-            },
-            "require-dev": {
-                "nikic/php-parser": "^4.13",
-                "phpstan/phpstan-src": "^1.10"
-            },
-            "bin": [
-                "bin/extract-locales",
-                "bin/licence-headers-check",
-                "tools/plugin-release"
-            ],
-            "type": "library",
-            "autoload": {
-                "psr-4": {
-                    "GlpiProject\\Tools\\": "src/"
-                }
-            },
-            "notification-url": "https://packagist.org/downloads/",
-            "license": [
-                "GPL-3.0-or-later"
-            ],
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-                    "email": "glpi@teclib.com",
-                    "homepage": "http://teclib-group.com"
-                }
-            ],
-            "description": "Various tools for GLPI and its plugins",
-            "keywords": [
-                "glpi",
-                "plugins",
-                "tools"
-            ],
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-                "source": "https://github.com/glpi-project/tools"
-            },
-            "time": "2025-10-14T10:26:06+00:00"
-        },
-        {
-            "name": "psr/container",
-            "version": "2.0.2",
-            "source": {
-                "type": "git",
-                "url": "https://github.com/php-fig/container.git",
-                "reference": "c71ecc56dfe541dbd90c5360474fbc405f8d5963"
-            },
-            "dist": {
-                "type": "zip",
-                "url": "https://api.github.com/repos/php-fig/container/zipball/c71ecc56dfe541dbd90c5360474fbc405f8d5963",
-                "reference": "c71ecc56dfe541dbd90c5360474fbc405f8d5963",
-                "shasum": ""
-            },
-            "require": {
-                "php": ">=7.4.0"
-            },
-            "type": "library",
-            "extra": {
-                "branch-alias": {
-                    "dev-master": "2.0.x-dev"
-                }
-            },
-            "autoload": {
-                "psr-4": {
-                    "Psr\\Container\\": "src/"
-                }
-            },
-            "notification-url": "https://packagist.org/downloads/",
-            "license": [
-                "MIT"
-            ],
-            "authors": [
-                {
-                    "name": "PHP-FIG",
-                    "homepage": "https://www.php-fig.org/"
-                }
-            ],
-            "description": "Common Container Interface (PHP FIG PSR-11)",
-            "homepage": "https://github.com/php-fig/container",
-            "keywords": [
-                "PSR-11",
-                "container",
-                "container-interface",
-                "container-interop",
-                "psr"
-            ],
-            "support": {
-                "issues": "https://github.com/php-fig/container/issues",
-                "source": "https://github.com/php-fig/container/tree/2.0.2"
-            },
-            "time": "2021-11-05T16:47:00+00:00"
-        },
-        {
-            "name": "symfony/console",
-            "version": "v6.4.27",
-            "source": {
-                "type": "git",
-                "url": "https://github.com/symfony/console.git",
-                "reference": "13d3176cf8ad8ced24202844e9f95af11e2959fc"
-            },
-            "dist": {
-                "type": "zip",
-                "url": "https://api.github.com/repos/symfony/console/zipball/13d3176cf8ad8ced24202844e9f95af11e2959fc",
-                "reference": "13d3176cf8ad8ced24202844e9f95af11e2959fc",
-                "shasum": ""
-            },
-            "require": {
-                "php": ">=8.1",
-                "symfony/deprecation-contracts": "^2.5|^3",
-                "symfony/polyfill-mbstring": "~1.0",
-                "symfony/service-contracts": "^2.5|^3",
-                "symfony/string": "^5.4|^6.0|^7.0"
-            },
-            "conflict": {
-                "symfony/dependency-injection": "<5.4",
-                "symfony/dotenv": "<5.4",
-                "symfony/event-dispatcher": "<5.4",
-                "symfony/lock": "<5.4",
-                "symfony/process": "<5.4"
-            },
-            "provide": {
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-            },
-            "require-dev": {
-                "psr/log": "^1|^2|^3",
-                "symfony/config": "^5.4|^6.0|^7.0",
-                "symfony/dependency-injection": "^5.4|^6.0|^7.0",
-                "symfony/event-dispatcher": "^5.4|^6.0|^7.0",
-                "symfony/http-foundation": "^6.4|^7.0",
-                "symfony/http-kernel": "^6.4|^7.0",
-                "symfony/lock": "^5.4|^6.0|^7.0",
-                "symfony/messenger": "^5.4|^6.0|^7.0",
-                "symfony/process": "^5.4|^6.0|^7.0",
-                "symfony/stopwatch": "^5.4|^6.0|^7.0",
-                "symfony/var-dumper": "^5.4|^6.0|^7.0"
-            },
-            "type": "library",
-            "autoload": {
-                "psr-4": {
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-                },
-                "exclude-from-classmap": [
-                    "/Tests/"
-                ]
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-            "license": [
-                "MIT"
-            ],
-            "authors": [
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-                    "name": "Fabien Potencier",
-                    "email": "fabien@symfony.com"
-                },
-                {
-                    "name": "Symfony Community",
-                    "homepage": "https://symfony.com/contributors"
-                }
-            ],
-            "description": "Eases the creation of beautiful and testable command line interfaces",
-            "homepage": "https://symfony.com",
-            "keywords": [
-                "cli",
-                "command-line",
-                "console",
-                "terminal"
-            ],
-            "support": {
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-            },
-            "funding": [
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-                    "url": "https://symfony.com/sponsor",
-                    "type": "custom"
-                },
-                {
-                    "url": "https://github.com/fabpot",
-                    "type": "github"
-                },
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-                    "type": "github"
-                },
-                {
-                    "url": "https://tidelift.com/funding/github/packagist/symfony/symfony",
-                    "type": "tidelift"
-                }
-            ],
-            "time": "2025-10-06T10:25:16+00:00"
-        },
-        {
-            "name": "symfony/deprecation-contracts",
-            "version": "v3.7.1",
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-                "url": "https://github.com/symfony/deprecation-contracts.git",
-                "reference": "f3202fa1b5097b0af062dc978b32ecf63404e31d"
-            },
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-            },
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-                    "homepage": "https://symfony.com/contributors"
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-                "url": "https://github.com/symfony/polyfill-ctype.git",
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-                "php": ">=7.2"
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-            "provide": {
-                "ext-ctype": "*"
-            },
-            "suggest": {
-                "ext-ctype": "For best performance"
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-            "type": "library",
-            "extra": {
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-                }
-            },
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-                "files": [
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-                "reference": "45112560a3ba2d715666a509a0bc9521d10b6c43",
-                "shasum": ""
-            },
-            "require": {
-                "php": ">=8.1",
-                "psr/container": "^1.1|^2.0",
-                "symfony/deprecation-contracts": "^2.5|^3"
-            },
-            "conflict": {
-                "ext-psr": "<1.1|>=2"
-            },
-            "type": "library",
-            "extra": {
-                "thanks": {
-                    "url": "https://github.com/symfony/contracts",
-                    "name": "symfony/contracts"
-                },
-                "branch-alias": {
-                    "dev-main": "3.6-dev"
-                }
-            },
-            "autoload": {
-                "psr-4": {
-                    "Symfony\\Contracts\\Service\\": ""
-                },
-                "exclude-from-classmap": [
-                    "/Test/"
-                ]
-            },
-            "notification-url": "https://packagist.org/downloads/",
-            "license": [
-                "MIT"
-            ],
-            "authors": [
-                {
-                    "name": "Nicolas Grekas",
-                    "email": "p@tchwork.com"
-                },
-                {
-                    "name": "Symfony Community",
-                    "homepage": "https://symfony.com/contributors"
-                }
-            ],
-            "description": "Generic abstractions related to writing services",
-            "homepage": "https://symfony.com",
-            "keywords": [
-                "abstractions",
-                "contracts",
-                "decoupling",
-                "interfaces",
-                "interoperability",
-                "standards"
-            ],
-            "support": {
-                "source": "https://github.com/symfony/service-contracts/tree/v3.6.1"
-            },
-            "funding": [
-                {
-                    "url": "https://symfony.com/sponsor",
-                    "type": "custom"
-                },
-                {
-                    "url": "https://github.com/fabpot",
-                    "type": "github"
-                },
-                {
-                    "url": "https://github.com/nicolas-grekas",
-                    "type": "github"
-                },
-                {
-                    "url": "https://tidelift.com/funding/github/packagist/symfony/symfony",
-                    "type": "tidelift"
-                }
-            ],
-            "time": "2025-07-15T11:30:57+00:00"
-        },
-        {
-            "name": "symfony/string",
-            "version": "v7.3.4",
-            "source": {
-                "type": "git",
-                "url": "https://github.com/symfony/string.git",
-                "reference": "f96476035142921000338bad71e5247fbc138872"
-            },
-            "dist": {
-                "type": "zip",
-                "url": "https://api.github.com/repos/symfony/string/zipball/f96476035142921000338bad71e5247fbc138872",
-                "reference": "f96476035142921000338bad71e5247fbc138872",
-                "shasum": ""
-            },
-            "require": {
-                "php": ">=8.2",
-                "symfony/polyfill-ctype": "~1.8",
-                "symfony/polyfill-intl-grapheme": "~1.0",
-                "symfony/polyfill-intl-normalizer": "~1.0",
-                "symfony/polyfill-mbstring": "~1.0"
-            },
-            "conflict": {
-                "symfony/translation-contracts": "<2.5"
-            },
-            "require-dev": {
-                "symfony/emoji": "^7.1",
-                "symfony/http-client": "^6.4|^7.0",
-                "symfony/intl": "^6.4|^7.0",
-                "symfony/translation-contracts": "^2.5|^3.0",
-                "symfony/var-exporter": "^6.4|^7.0"
-            },
-            "type": "library",
-            "autoload": {
-                "files": [
-                    "Resources/functions.php"
-                ],
-                "psr-4": {
-                    "Symfony\\Component\\String\\": ""
-                },
-                "exclude-from-classmap": [
-                    "/Tests/"
-                ]
-            },
-            "notification-url": "https://packagist.org/downloads/",
-            "license": [
-                "MIT"
-            ],
-            "authors": [
-                {
-                    "name": "Nicolas Grekas",
-                    "email": "p@tchwork.com"
-                },
-                {
-                    "name": "Symfony Community",
-                    "homepage": "https://symfony.com/contributors"
-                }
-            ],
-            "description": "Provides an object-oriented API to strings and deals with bytes, UTF-8 code points and grapheme clusters in a unified way",
-            "homepage": "https://symfony.com",
-            "keywords": [
-                "grapheme",
-                "i18n",
-                "string",
-                "unicode",
-                "utf-8",
-                "utf8"
-            ],
-            "support": {
-                "source": "https://github.com/symfony/string/tree/v7.3.4"
-            },
-            "funding": [
-                {
-                    "url": "https://symfony.com/sponsor",
-                    "type": "custom"
-                },
-                {
-                    "url": "https://github.com/fabpot",
-                    "type": "github"
-                },
-                {
-                    "url": "https://github.com/nicolas-grekas",
-                    "type": "github"
-                },
-                {
-                    "url": "https://tidelift.com/funding/github/packagist/symfony/symfony",
-                    "type": "tidelift"
-                }
-            ],
-            "time": "2025-09-11T14:36:48+00:00"
-        },
-        {
-            "name": "twig/twig",
-            "version": "v3.27.1",
-            "source": {
-                "type": "git",
-                "url": "https://github.com/twigphp/Twig.git",
-                "reference": "ae2071bffb38f04847fc0864d730c94b9cb8ab74"
-            },
-            "dist": {
-                "type": "zip",
-                "url": "https://api.github.com/repos/twigphp/Twig/zipball/ae2071bffb38f04847fc0864d730c94b9cb8ab74",
-                "reference": "ae2071bffb38f04847fc0864d730c94b9cb8ab74",
-                "shasum": ""
-            },
-            "require": {
-                "php": ">=8.1.0",
-                "symfony/deprecation-contracts": "^2.5|^3",
-                "symfony/polyfill-ctype": "^1.8",
-                "symfony/polyfill-mbstring": "^1.3"
-            },
-            "require-dev": {
-                "php-cs-fixer/shim": "^3.0@stable",
-                "phpstan/phpstan": "^2.0@stable",
-                "psr/container": "^1.0|^2.0",
-                "symfony/phpunit-bridge": "^5.4.9|^6.4|^7.0"
-            },
-            "type": "library",
-            "autoload": {
-                "files": [
-                    "src/Resources/core.php",
-                    "src/Resources/debug.php",
-                    "src/Resources/escaper.php",
-                    "src/Resources/string_loader.php"
-                ],
-                "psr-4": {
-                    "Twig\\": "src/"
-                }
-            },
-            "notification-url": "https://packagist.org/downloads/",
-            "license": [
-                "BSD-3-Clause"
-            ],
-            "authors": [
-                {
-                    "name": "Fabien Potencier",
-                    "email": "fabien@symfony.com",
-                    "homepage": "http://fabien.potencier.org",
-                    "role": "Lead Developer"
-                },
-                {
-                    "name": "Twig Team",
-                    "role": "Contributors"
-                },
-                {
-                    "name": "Armin Ronacher",
-                    "email": "armin.ronacher@active-4.com",
-                    "role": "Project Founder"
-                }
-            ],
-            "description": "Twig, the flexible, fast, and secure template language for PHP",
-            "homepage": "https://twig.symfony.com",
-            "keywords": [
-                "templating"
-            ],
-            "support": {
-                "issues": "https://github.com/twigphp/Twig/issues",
-                "source": "https://github.com/twigphp/Twig/tree/v3.27.1"
-            },
-            "funding": [
-                {
-                    "url": "https://github.com/fabpot",
-                    "type": "github"
-                },
-                {
-                    "url": "https://tidelift.com/funding/github/packagist/twig/twig",
-                    "type": "tidelift"
-                }
-            ],
-            "time": "2026-05-30T17:09:26+00:00"
-        }
-    ],
+    "packages-dev": [],
     "aliases": [],
     "minimum-stability": "stable",
     "stability-flags": {},
diff --git a/hook.php b/hook.php
index 8bab7d2..60c764f 100644
--- a/hook.php
+++ b/hook.php
@@ -63,9 +63,9 @@ function plugin_itilcategorygroups_getAddSearchOptions($itemtype)
 {
     if (isset($_SESSION['glpiactiveentities'])) {
         return PluginItilcategorygroupsGroup_Level::getAddSearchOptions($itemtype);
-    } else {
-        return null;
     }
+
+    return null;
 }
 
 function plugin_itilcategorygroups_giveItem($type, $ID, $data, $num)
diff --git a/inc/category.class.php b/inc/category.class.php
index 221bdad..2f2fee1 100644
--- a/inc/category.class.php
+++ b/inc/category.class.php
@@ -41,13 +41,13 @@ class PluginItilcategorygroupsCategory extends CommonDropdown
 
     public $second_level_menu     = 'itilcategorygroups';
 
-    public $display_dropdowntitle = false;
+    public bool $display_dropdowntitle = false;
 
-    public $can_be_translated = false;
+    public bool $can_be_translated = false;
 
-    public static $rightname = 'config';
+    public static string $rightname = 'config';
 
-    public $dohistory = true;
+    public bool $dohistory = true;
 
     public static function getTypeName($nb = 0)
     {
@@ -378,8 +378,7 @@ public static function getGroupsForCategory($itilcategories_id, $params = [])
         $table    = getTableForItemType(self::class);
 
         if ($category->getFromDB($itilcategories_id)) {
-            $entity_restrict[] = getEntitiesRestrictRequest(
-                '',
+            $entity_restrict = getEntitiesRestrictCriteria(
                 'cat',
                 'entities_id',
                 $options['entities_id'],
diff --git a/inc/category_group.class.php b/inc/category_group.class.php
index e900910..14aae64 100644
--- a/inc/category_group.class.php
+++ b/inc/category_group.class.php
@@ -30,9 +30,9 @@
 
 class PluginItilcategorygroupsCategory_Group extends CommonDBChild
 {
-    public static $itemtype = 'PluginItilcategorygroupsCategory';
+    public static string $itemtype = 'PluginItilcategorygroupsCategory';
 
-    public static $items_id = 'plugin_itilcategorygroups_categories_id';
+    public static string $items_id = 'plugin_itilcategorygroups_categories_id';
 
     public static function install(Migration $migration)
     {
diff --git a/inc/group_level.class.php b/inc/group_level.class.php
index f6ffbd5..e490986 100644
--- a/inc/group_level.class.php
+++ b/inc/group_level.class.php
@@ -33,9 +33,9 @@
 class PluginItilcategorygroupsGroup_Level extends CommonDBChild
 {
     // From CommonDBChild
-    public static $itemtype = 'Group';
+    public static string $itemtype = 'Group';
 
-    public static $items_id = 'groups_id';
+    public static string $items_id = 'groups_id';
 
     public static function getIndexName()
     {
@@ -49,12 +49,12 @@ public static function getTypeName($nb = 0)
 
     public static function canView(): bool
     {
-        return Session::haveRight('config', READ);
+        return Session::haveRight(Config::$rightname, READ);
     }
 
     public static function canCreate(): bool
     {
-        return Session::haveRight('config', CREATE);
+        return Session::haveRight(Config::$rightname, CREATE);
     }
 
     public static function canPurge(): bool
@@ -95,8 +95,8 @@ public static function uninstall()
 
     public function getTabNameForItem(CommonGLPI $item, $withtemplate = 0)
     {
-        if (!$withtemplate && $item->getType() === 'Group') {
-            return self::createTabEntry(__s('ItilCategory Groups', 'itilcategorygroups'), 0, $item::getType(), PluginItilcategorygroupsCategory::getIcon());
+        if (!$withtemplate && $item::class === 'Group') {
+            return self::createTabEntry(__s('ItilCategory Groups', 'itilcategorygroups'), 0, $item::class, PluginItilcategorygroupsCategory::getIcon());
         }
 
         return '';
diff --git a/inc/menu.class.php b/inc/menu.class.php
index 862af33..5598f43 100644
--- a/inc/menu.class.php
+++ b/inc/menu.class.php
@@ -47,12 +47,12 @@ public static function getMenuContent()
         $menu['page']  = '/plugins/itilcategorygroups/front/category.php';
         $menu['icon']  = PluginItilcategorygroupsCategory::getIcon();
 
-        if (Session::haveRight('config', READ)) {
+        if (Session::haveRight(Config::$rightname, READ)) {
             $menu['options']['model']['title']           = PluginItilcategorygroupsMenu::getTypeName();
             $menu['options']['model']['page']            = Toolbox::getItemTypeSearchUrl(PluginItilcategorygroupsCategory::class, false);
             $menu['options']['model']['links']['search'] = Toolbox::getItemTypeSearchUrl(PluginItilcategorygroupsCategory::class, false);
 
-            if (Session::haveRight('config', UPDATE)) {
+            if (Session::haveRight(Config::$rightname, UPDATE)) {
                 $menu['options']['model']['links']['add'] = Toolbox::getItemTypeFormUrl(PluginItilcategorygroupsCategory::class, false);
             }
         }
diff --git a/setup.php b/setup.php
index b29433a..7e1907b 100644
--- a/setup.php
+++ b/setup.php
@@ -33,8 +33,8 @@
 use function Safe\define;
 
 define('PLUGIN_ITILCATEGORYGROUPS_VERSION', '2.6.2');
-define('PLUGIN_ITILCATEGORYGROUPS_MIN_GLPI', '11.0.0');
-define('PLUGIN_ITILCATEGORYGROUPS_MAX_GLPI', '11.0.99');
+define('PLUGIN_ITILCATEGORYGROUPS_MIN_GLPI', '12.0.0');
+define('PLUGIN_ITILCATEGORYGROUPS_MAX_GLPI', '12.0.99');
 
 function plugin_init_itilcategorygroups()
 {
@@ -52,14 +52,14 @@ function plugin_init_itilcategorygroups()
     $PLUGIN_HOOKS['csrf_compliant']['itilcategorygroups'] = true;
 
     if (Plugin::isPluginActive('itilcategorygroups')) {
-        if (Session::haveRight('config', UPDATE)) {
+        if (Session::haveRight(Config::$rightname, UPDATE)) {
             $PLUGIN_HOOKS[Hooks::CONFIG_PAGE]['itilcategorygroups'] = 'front/category.php';
         }
 
         Plugin::registerClass(PluginItilcategorygroupsCategory::class, ['forwardentityfrom' => ITILCategory::class]);
         Plugin::registerClass(PluginItilcategorygroupsGroup_Level::class, ['addtabon' => 'Group']);
 
-        if (Session::haveRight('config', READ)) {
+        if (Session::haveRight(Config::$rightname, READ)) {
             // add to 'Admin' menu :
             $PLUGIN_HOOKS[Hooks::MENU_TOADD]['itilcategorygroups'] = ['admin' => PluginItilcategorygroupsMenu::class];
 
@@ -67,7 +67,7 @@ function plugin_init_itilcategorygroups()
             $PLUGIN_HOOKS[Hooks::PRE_ITEM_UPDATE]['itilcategorygroups'] = [Group::class => 'plugin_pre_item_update_itilcategorygroups'];
         }
 
-        if (Session::haveRight('config', UPDATE)) {
+        if (Session::haveRight(Config::$rightname, UPDATE)) {
             $PLUGIN_HOOKS['submenu_entry']['itilcategorygroups']['options']['PluginItilcategorygroupsCategory']['links']['add']
                = '/' . $CFG_GLPI['root_doc'] . '/plugins/itilcategorygroups/front/category.form.php';
         }