diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2d2654f..ad2577a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,9 @@
+postExpired 2023.10.19
+===========================================================
+* Require Dotclear 2.28
+* Require PHP 8.1
+* Upgrade to Dotclear 2.28
+
 postExpired 2023.08.13
 ===========================================================
 * Require Dotclear 2.27
diff --git a/README.md b/README.md
index 2135dcc..0273361 100644
--- a/README.md
+++ b/README.md
@@ -1,26 +1,23 @@
 # README
 
 [![Release](https://img.shields.io/badge/release-2023.08.13-a2cbe9.svg)](https://git.dotclear.watch/JcDenis/postExpired/releases)
-[![Date](https://img.shields.io/badge/date-2023.08.13-c44d58.svg)](https://git.dotclear.watch/JcDenis/postExpired/releases)
+![Date](https://img.shields.io/badge/date-2023.08.13-c44d58.svg)
 [![Dotclear](https://img.shields.io/badge/dotclear-v2.27-137bbb.svg)](https://fr.dotclear.org/download)
 [![Dotaddict](https://img.shields.io/badge/dotaddict-official-9ac123.svg)](https://plugins.dotaddict.org/dc2/details/postExpired)
-[![License](https://img.shields.io/github/license/JcDenis/postExpired)](https://git.dotclear.watch/JcDenis/postExpired/blob/master/LICENSE)
+[![License](https://img.shields.io/badge/license-GPL--2.0-ececec.svg)](https://git.dotclear.watch/JcDenis/postExpired/src/branch/master/LICENSE)
 
-## WHAT IS POSTEXPIRED ?
+## ABOUT
 
-Post expired is a plugin for the open-source 
-web publishing software called Dotclear.
+_postExpired_ is a plugin for the open-source web publishing software called [Dotclear](https://www.dotclear.org).
 
-It add options to the sidebar of post edition page 
+> Add options to the sidebar of post edition page 
 to change some options of a post at a given time.
 
 ## REQUIREMENTS
 
-_postExpired_ requires: 
-
-* contentadmin permissions
-* Dotclear 2.27
-* PHP 7.4+
+* Dotclear 2.28
+* PHP 8.1+
+* Dotclear contentadmin permissions
 
 ## USAGE
 
@@ -39,13 +36,14 @@ Notes:
 
 ## LINKS
 
-* License : [GNU GPL v2](https://www.gnu.org/licenses/old-licenses/lgpl-2.0.html)
-* Source & contribution : [Gitea Page](https://git.dotclear.watch/JcDenis/postExpired) or [GitHub Page](https://github.com/JcDenis/postExpired)
-* Packages & details: [Gitea Page](https://git.dotclear.watch/JcDenis/postExpired/releases) or [Dotaddict Page](https://plugins.dotaddict.org/dc2/details/postExpired)
-* Discuss & help : [Dotclear Forum](https://forum.dotclear.org/viewtopic.php?id=42305)
+* [License](https://git.dotclear.watch/JcDenis/postExpired/src/branch/master/LICENSE)
+* [Packages & details](https://git.dotclear.watch/JcDenis/postExpired/releases) (or on [Dotaddict](https://plugins.dotaddict.org/dc2/details/postExpired))
+* [Sources & contributions](https://git.dotclear.watch/JcDenis/postExpired) (or on [GitHub](https://github.com/JcDenis/postExpired))
+* [Issues & security](https://git.dotclear.watch/JcDenis/postExpired/issues) (or on [GitHub](https://github.com/JcDenis/postExpired/issues))
+* [Discuss & help](https://forum.dotclear.org/viewtopic.php?id=42305)
 
 ## CONTRIBUTORS
 
-* Jean-Christian Denis
+* Jean-Christian Denis (author)
 
 You are welcome to contribute to this code.
diff --git a/_define.php b/_define.php
index 53a2480..d102ca7 100644
--- a/_define.php
+++ b/_define.php
@@ -1,33 +1,30 @@
 <?php
 /**
- * @brief postExpired, a plugin for Dotclear 2
+ * @file
+ * @brief       The plugin postExpired definition
+ * @ingroup     postExpired
  *
- * @package Dotclear
- * @subpackage Plugin
+ * @defgroup    postExpired Plugin postExpired.
  *
- * @author Jean-Christian Denis and Contributors
+ * Change entries options at a given date.
  *
- * @copyright Jean-Christian Denis
- * @copyright GPL-2.0 https://www.gnu.org/licenses/gpl-2.0.html
+ * @author      Tomtom (author)
+ * @author      Jean-Christian Denis (latest)
+ * @copyright   GPL-2.0 https://www.gnu.org/licenses/gpl-2.0.html
  */
-if (!defined('DC_RC_PATH')) {
-    return null;
-}
+declare(strict_types=1);
 
 $this->registerModule(
     'Expired entries',
     'Change entries options at a given date',
     'Jean-Christian Denis and Contributors',
-    '2023.08.13',
+    '2023.10.19',
     [
-        'requires'    => [['core', '2.27']],
-        'permissions' => dcCore::app()->auth->makePermissions([
-            dcCore::app()->auth::PERMISSION_USAGE,
-            dcCore::app()->auth::PERMISSION_CONTENT_ADMIN,
-        ]),
-        'type'       => 'plugin',
-        'support'    => 'https://git.dotclear.watch/JcDenis/' . basename(__DIR__) . '/issues',
-        'details'    => 'https://git.dotclear.watch/JcDenis/' . basename(__DIR__) . '/src/branch/master/README.md',
-        'repository' => 'https://git.dotclear.watch/JcDenis/' . basename(__DIR__) . '/raw/branch/master/dcstore.xml',
+        'requires'    => [['core', '2.28']],
+        'permissions' => 'My',
+        'type'        => 'plugin',
+        'support'     => 'https://git.dotclear.watch/JcDenis/' . basename(__DIR__) . '/issues',
+        'details'     => 'https://git.dotclear.watch/JcDenis/' . basename(__DIR__) . '/src/branch/master/README.md',
+        'repository'  => 'https://git.dotclear.watch/JcDenis/' . basename(__DIR__) . '/raw/branch/master/dcstore.xml',
     ]
 );
diff --git a/dcstore.xml b/dcstore.xml
index 93e7ca2..e2ba0fc 100644
--- a/dcstore.xml
+++ b/dcstore.xml
@@ -2,11 +2,11 @@
 <modules xmlns:da="http://dotaddict.org/da/">
   <module id="postExpired">
     <name>Expired entries</name>
-    <version>2023.08.13</version>
+    <version>2023.10.19</version>
     <author>Jean-Christian Denis and Contributors</author>
     <desc>Change entries options at a given date</desc>
-    <file>https://git.dotclear.watch/JcDenis/postExpired/releases/download/v2023.08.13/plugin-postExpired.zip</file>
-    <da:dcmin>2.27</da:dcmin>
+    <file>https://git.dotclear.watch/JcDenis/postExpired/releases/download/v2023.10.19/plugin-postExpired.zip</file>
+    <da:dcmin>2.28</da:dcmin>
     <da:details>https://git.dotclear.watch/JcDenis/postExpired/src/branch/master/README.md</da:details>
     <da:support>https://git.dotclear.watch/JcDenis/postExpired/issues</da:support>
   </module>
diff --git a/src/Backend.php b/src/Backend.php
index 952b6ac..b96e5c3 100644
--- a/src/Backend.php
+++ b/src/Backend.php
@@ -1,22 +1,19 @@
 <?php
-/**
- * @brief postExpired, a plugin for Dotclear 2
- *
- * @package Dotclear
- * @subpackage Plugin
- *
- * @author Jean-Christian Denis and Contributors
- *
- * @copyright Jean-Christian Denis
- * @copyright GPL-2.0 https://www.gnu.org/licenses/gpl-2.0.html
- */
+
 declare(strict_types=1);
 
 namespace Dotclear\Plugin\postExpired;
 
-use dcCore;
+use Dotclear\App;
 use Dotclear\Core\Process;
 
+/**
+ * @brief       postExpired backend class.
+ * @ingroup     postExpired
+ *
+ * @author      Jean-Christian Denis
+ * @copyright   GPL-2.0 https://www.gnu.org/licenses/gpl-2.0.html
+ */
 class Backend extends Process
 {
     public static function init(): bool
@@ -30,19 +27,19 @@ class Backend extends Process
             return false;
         }
 
-        dcCore::app()->addBehaviors([
-            'adminPostsActions'     => [BackendBehaviors::class, 'adminPostsActions'],
-            'adminPagesActions'     => [BackendBehaviors::class, 'adminPostsActions'],
-            'adminPostHeaders'      => [BackendBehaviors::class, 'adminPostHeaders'],
-            'adminPageHeaders'      => [BackendBehaviors::class, 'adminPostHeaders'],
-            'adminPostFormItems'    => [BackendBehaviors::class, 'adminPostFormItems'],
-            'adminPageFormItems'    => [BackendBehaviors::class, 'adminPostFormItems'],
-            'adminBeforePostDelete' => [BackendBehaviors::class, 'adminBeforePostDelete'],
-            'adminBeforePageDelete' => [BackendBehaviors::class, 'adminBeforePostDelete'],
-            'adminAfterPostUpdate'  => [BackendBehaviors::class, 'adminAfterPostSave'],
-            'adminAfterPageUpdate'  => [BackendBehaviors::class, 'adminAfterPostSave'],
-            'adminAfterPostCreate'  => [BackendBehaviors::class, 'adminAfterPostSave'],
-            'adminAfterPageCreate'  => [BackendBehaviors::class, 'adminAfterPostSave'],
+        App::behavior()->addBehaviors([
+            'adminPostsActions'     => BackendBehaviors::adminPostsActions(...),
+            'adminPagesActions'     => BackendBehaviors::adminPostsActions(...),
+            'adminPostHeaders'      => BackendBehaviors::adminPostHeaders(...),
+            'adminPageHeaders'      => BackendBehaviors::adminPostHeaders(...),
+            'adminPostFormItems'    => BackendBehaviors::adminPostFormItems(...),
+            'adminPageFormItems'    => BackendBehaviors::adminPostFormItems(...),
+            'adminBeforePostDelete' => BackendBehaviors::adminBeforePostDelete(...),
+            'adminBeforePageDelete' => BackendBehaviors::adminBeforePostDelete(...),
+            'adminAfterPostUpdate'  => BackendBehaviors::adminAfterPostSave(...),
+            'adminAfterPageUpdate'  => BackendBehaviors::adminAfterPostSave(...),
+            'adminAfterPostCreate'  => BackendBehaviors::adminAfterPostSave(...),
+            'adminAfterPageCreate'  => BackendBehaviors::adminAfterPostSave(...),
         ]);
 
         return true;
diff --git a/src/BackendBehaviors.php b/src/BackendBehaviors.php
index 5be5df0..ed1b116 100644
--- a/src/BackendBehaviors.php
+++ b/src/BackendBehaviors.php
@@ -1,22 +1,12 @@
 <?php
-/**
- * @brief postExpired, a plugin for Dotclear 2
- *
- * @package Dotclear
- * @subpackage Plugin
- *
- * @author Jean-Christian Denis and Contributors
- *
- * @copyright Jean-Christian Denis
- * @copyright GPL-2.0 https://www.gnu.org/licenses/gpl-2.0.html
- */
+
 declare(strict_types=1);
 
 namespace Dotclear\Plugin\postExpired;
 
 use ArrayObject;
 use DateTimeZone;
-use dcCore;
+use Dotclear\App;
 use Dotclear\Core\Backend\Action\ActionsPosts;
 use Dotclear\Core\Backend\{
     Notices,
@@ -44,9 +34,11 @@ use Dotclear\Helper\Html\Html;
 use Exception;
 
 /**
- * @ingroup DC_PLUGIN_POSTEXPIRED
- * @brief Scheduled post change - admin methods.
- * @since 2.6
+ * @brief       postExpired backend behaviors class.
+ * @ingroup     postExpired
+ *
+ * @author      Jean-Christian Denis
+ * @copyright   GPL-2.0 https://www.gnu.org/licenses/gpl-2.0.html
  */
 class BackendBehaviors
 {
@@ -63,7 +55,7 @@ class BackendBehaviors
                     __('Add expired date') => 'post_expired_add',
                 ],
             ],
-            [self::class, 'callbackAdd']
+            self::callbackAdd(...)
         );
 
         $pa->addAction(
@@ -72,7 +64,7 @@ class BackendBehaviors
                     __('Remove expired date') => 'post_expired_remove',
                 ],
             ],
-            [self::class, 'callbackRemove']
+            self::callbackRemove(...)
         );
     }
 
@@ -183,9 +175,9 @@ class BackendBehaviors
 
             $pa->beginPage(
                 Page::breadcrumb([
-                    Html::escapeHTML(dcCore::app()->blog->name) => '',
-                    $pa->getCallerTitle()                       => $pa->getRedirection(true),
-                    __('Add expired date to this selection')    => '',
+                    Html::escapeHTML(App::blog()->name())    => '',
+                    $pa->getCallerTitle()                    => $pa->getRedirection(true),
+                    __('Add expired date to this selection') => '',
                 ]),
                 //Page::jsDatePicker() .
                 self::adminPostHeaders()
@@ -197,7 +189,7 @@ class BackendBehaviors
                 (new Para())->items([
                     ... self::fieldsPostExpired($posts->f('post_type'), null, false),
                     ... $pa->hiddenFields(),
-                    dcCore::app()->formNonce(false),
+                    App::nonce()->formNonce(),
                     (new Hidden(['action'], 'post_expired_add')),
                     (new Submit(['do']))->value(__('Save')),
                 ]),
@@ -237,7 +229,7 @@ class BackendBehaviors
      */
     private static function delPostExpired(int $post_id): void
     {
-        dcCore::app()->meta->delPostMeta($post_id, My::META_TYPE);
+        App::meta()->delPostMeta($post_id, My::META_TYPE);
     }
 
     /**
@@ -281,7 +273,7 @@ class BackendBehaviors
             $post_expired['newpassword'] = (string) $post['post_expired_newpassword'];
         }
 
-        dcCore::app()->meta->setPostMeta(
+        App::meta()->setPostMeta(
             $post_id,
             My::META_TYPE,
             My::encode($post_expired)
@@ -301,7 +293,7 @@ class BackendBehaviors
         $fields = $post_expired = [];
 
         if ($post_id) {
-            $rs = dcCore::app()->meta->getMetadata([
+            $rs = App::meta()->getMetadata([
                 'meta_type' => My::META_TYPE,
                 'post_id'   => $post_id,
                 'limit'     => 1,
@@ -328,7 +320,7 @@ class BackendBehaviors
             $fields['post_expired_category'] = (new Para())->items([
                 (new Label(__('Category:'), Label::OUTSIDE_LABEL_BEFORE))->for('post_expired_category'),
                 (new Select('post_expired_category'))->default(empty($post_expired['category']) ? '' : $post_expired['category'])->items(self::categoriesCombo(
-                    dcCore::app()->blog->getCategories(
+                    App::blog()->getCategories(
                         ['post_type' => 'post']
                     )
                 )),
@@ -383,7 +375,7 @@ class BackendBehaviors
         ];
 
         try {
-            $categories = dcCore::app()->blog->getCategories(
+            $categories = App::blog()->getCategories(
                 ['post_type' => 'post']
             );
             while ($categories->fetch()) {
@@ -465,7 +457,7 @@ class BackendBehaviors
      */
     private static function dateFromUser(string $date): string
     {
-        $u = !isset(dcCore::app()->auth) ? 'UTC' : dcCore::app()->auth->getInfo('user_tz');
+        $u = App::auth()->getInfo('user_tz') ?? 'UTC';
         $d = date_create($date, new DateTimeZone($u));
 
         return $d ? date_format($d->setTimezone(new DateTimeZone('UTC')), 'Y-m-d H:i:00') : '';
@@ -480,7 +472,7 @@ class BackendBehaviors
      */
     private static function dateToUser(string $date): string
     {
-        $u = !isset(dcCore::app()->auth) ? 'UTC' : dcCore::app()->auth->getInfo('user_tz');
+        $u = App::auth()->getInfo('user_tz') ?? 'UTC';
         $d = date_create($date, new DateTimeZone('UTC'));
 
         return $d ? date_format($d->setTimezone(new DateTimeZone($u)), 'Y-m-d\TH:i') : '';
diff --git a/src/Frontend.php b/src/Frontend.php
index fa9d03e..abed575 100644
--- a/src/Frontend.php
+++ b/src/Frontend.php
@@ -1,22 +1,19 @@
 <?php
-/**
- * @brief postExpired, a plugin for Dotclear 2
- *
- * @package Dotclear
- * @subpackage Plugin
- *
- * @author Jean-Christian Denis and Contributors
- *
- * @copyright Jean-Christian Denis
- * @copyright GPL-2.0 https://www.gnu.org/licenses/gpl-2.0.html
- */
+
 declare(strict_types=1);
 
 namespace Dotclear\Plugin\postExpired;
 
-use dcCore;
+use Dotclear\App;
 use Dotclear\Core\Process;
 
+/**
+ * @brief       postExpired frontend class.
+ * @ingroup     postExpired
+ *
+ * @author      Jean-Christian Denis
+ * @copyright   GPL-2.0 https://www.gnu.org/licenses/gpl-2.0.html
+ */
 class Frontend extends Process
 {
     public static function init(): bool
@@ -35,27 +32,27 @@ class Frontend extends Process
         __('This entry has no expiration date');
 
         # launch update only on public home page and feed
-        if (in_array(dcCore::app()->url->type, ['default', 'feed'])) {
-            dcCore::app()->addBehavior(
+        if (in_array(App::url()->type, ['default', 'feed'])) {
+            App::behavior()->addBehavior(
                 'publicBeforeDocumentV2',
-                [FrontendBehaviors::class, 'publicBeforeDocumentV2']
+                FrontendBehaviors::publicBeforeDocumentV2(...)
             );
         }
-        dcCore::app()->addBehavior(
+        App::behavior()->addBehavior(
             'coreBlogGetPosts',
-            [FrontendBehaviors::class, 'coreBlogGetPosts']
+            FrontendBehaviors::coreBlogGetPosts(...)
         );
-        dcCore::app()->tpl->addBlock(
+        App::frontend()->template()->addBlock(
             'EntryExpiredIf',
-            [FrontendTemplate::class, 'EntryExpiredIf']
+            FrontendTemplate::EntryExpiredIf(...)
         );
-        dcCore::app()->tpl->addValue(
+        App::frontend()->template()->addValue(
             'EntryExpiredDate',
-            [FrontendTemplate::class, 'EntryExpiredDate']
+            FrontendTemplate::EntryExpiredDate(...)
         );
-        dcCore::app()->tpl->addValue(
+        App::frontend()->template()->addValue(
             'EntryExpiredTime',
-            [FrontendTemplate::class, 'EntryExpiredTime']
+            FrontendTemplate::EntryExpiredTime(...)
         );
 
         return true;
diff --git a/src/FrontendBehaviors.php b/src/FrontendBehaviors.php
index 419fcd9..d1e472b 100644
--- a/src/FrontendBehaviors.php
+++ b/src/FrontendBehaviors.php
@@ -1,23 +1,11 @@
 <?php
-/**
- * @brief postExpired, a plugin for Dotclear 2
- *
- * @package Dotclear
- * @subpackage Plugin
- *
- * @author Jean-Christian Denis and Contributors
- *
- * @copyright Jean-Christian Denis
- * @copyright GPL-2.0 https://www.gnu.org/licenses/gpl-2.0.html
- */
+
 declare(strict_types=1);
 
 namespace Dotclear\Plugin\postExpired;
 
 use DateTimeZone;
-use dcBlog;
-use dcCore;
-use dcMeta;
+use Dotclear\App;
 use Dotclear\Database\MetaRecord;
 use Dotclear\Database\Statement\{
     JoinStatement,
@@ -25,9 +13,11 @@ use Dotclear\Database\Statement\{
 };
 
 /**
- * @ingroup DC_PLUGIN_POSTEXPIRED
- * @brief Scheduled post change - public methods.
- * @since 2.6
+ * @brief       postExpired frontend behaviors class.
+ * @ingroup     postExpired
+ *
+ * @author      Jean-Christian Denis
+ * @copyright   GPL-2.0 https://www.gnu.org/licenses/gpl-2.0.html
  */
 class FrontendBehaviors
 {
@@ -38,7 +28,7 @@ class FrontendBehaviors
     {
         // Get expired dates and post_id
         $sql   = new SelectStatement();
-        $posts = $sql->from($sql->as(dcCore::app()->prefix . dcBlog::POST_TABLE_NAME, 'P'))
+        $posts = $sql->from($sql->as(App::con()->prefix() . App::blog()::POST_TABLE_NAME, 'P'))
             ->columns([
                 'P.post_id',
                 'P.post_tz',
@@ -47,11 +37,11 @@ class FrontendBehaviors
             ->join(
                 (new JoinStatement())
                     ->inner()
-                    ->from($sql->as(dcCore::app()->prefix . dcMeta::META_TABLE_NAME, 'META'))
+                    ->from($sql->as(App::con()->prefix() . App::meta()::META_TABLE_NAME, 'META'))
                     ->on('META.post_id = P.post_id')
                     ->statement()
             )
-            ->where('blog_id = ' . $sql->quote((string) dcCore::app()->blog->id))
+            ->where('blog_id = ' . $sql->quote(App::blog()->id()))
             ->and('META.meta_type = ' . $sql->quote(My::META_TYPE))
             ->select();
 
@@ -65,7 +55,7 @@ class FrontendBehaviors
         $now_tz = (int) date_format(date_create('now', $utc), 'U');
 
         // Prepared post Cursor
-        $post_cur = dcCore::app()->con->openCursor(dcCore::app()->prefix . dcBlog::POST_TABLE_NAME);
+        $post_cur = App::blog()->openPostCursor();
 
         // Loop through marked posts
         $updated = false;
@@ -79,8 +69,8 @@ class FrontendBehaviors
 
             if ($now_tz > $meta_tz) {
                 // Delete meta for expired date
-                dcCore::app()->auth->sudo(
-                    [dcCore::app()->meta, 'delPostMeta'],
+                App::auth()->sudo(
+                    App::meta()->delPostMeta(...),
                     $posts->f('post_id'),
                     My::META_TYPE
                 );
@@ -135,7 +125,7 @@ class FrontendBehaviors
                 // Update post
                 $post_cur->update(
                     'WHERE post_id = ' . $posts->f('post_id') . ' ' .
-                    "AND blog_id = '" . dcCore::app()->con->escapeStr((string) dcCore::app()->blog->id) . "' "
+                    "AND blog_id = '" . App::con()->escapeStr(App::blog()->id()) . "' "
                 );
 
                 $updated = true;
@@ -144,7 +134,7 @@ class FrontendBehaviors
 
         // Say blog is updated
         if ($updated) {
-            dcCore::app()->blog->triggerBlog();
+            App::blog()->triggerBlog();
         }
     }
 
@@ -155,6 +145,6 @@ class FrontendBehaviors
      */
     public static function coreBlogGetPosts(MetaRecord $rs): void
     {
-        $rs->extend('rsExtPostExpired');
+        $rs->extend(rsExtPostExpired::class);
     }
 }
diff --git a/src/FrontendTemplate.php b/src/FrontendTemplate.php
index f1abd77..ef52139 100644
--- a/src/FrontendTemplate.php
+++ b/src/FrontendTemplate.php
@@ -1,28 +1,19 @@
 <?php
-/**
- * @brief postExpired, a plugin for Dotclear 2
- *
- * @package Dotclear
- * @subpackage Plugin
- *
- * @author Jean-Christian Denis and Contributors
- *
- * @copyright Jean-Christian Denis
- * @copyright GPL-2.0 https://www.gnu.org/licenses/gpl-2.0.html
- */
+
 declare(strict_types=1);
 
 namespace Dotclear\Plugin\postExpired;
 
 use ArrayObject;
-use dcCore;
-use dcTemplate;
+use Dotclear\App;
 use Dotclear\Helper\Date;
 
 /**
- * @ingroup DC_PLUGIN_POSTEXPIRED
- * @brief Scheduled post change - template methods.
- * @since 2.6
+ * @brief       postExpired frontend template class.
+ * @ingroup     postExpired
+ *
+ * @author      Jean-Christian Denis
+ * @copyright   GPL-2.0 https://www.gnu.org/licenses/gpl-2.0.html
  */
 class FrontendTemplate
 {
@@ -38,13 +29,13 @@ class FrontendTemplate
     {
         $if       = [];
         $operator = isset($attr['operator']) ?
-            dcTemplate::getOperator($attr['operator']) : '&&';
+            App::frontend()->template()->getOperator($attr['operator']) : '&&';
 
         if (isset($attr['has_date'])) {
             $sign = (bool) $attr['has_date'] ? '!' : '=';
-            $if[] = '(null ' . $sign . '== dcCore::app()->ctx->posts->postExpiredDate())';
+            $if[] = '(null ' . $sign . '== App::frontend()->context()->posts->postExpiredDate())';
         } else {
-            $if[] = '(null !== dcCore::app()->ctx->posts->postExpiredDate())';
+            $if[] = '(null !== App::frontend()->context()->posts->postExpiredDate())';
         }
 
         return
@@ -64,19 +55,19 @@ class FrontendTemplate
     {
         $format = !empty($attr['format']) ?
             addslashes($attr['format']) : '';
-        $f = dcCore::app()->tpl->getFilters($attr);
+        $f = App::frontend()->template()->getFilters($attr);
 
         if (!empty($attr['rfc822'])) {
-            $res = sprintf($f, Date::class . '::rfc822(strtotime(dcCore::app()->ctx->posts->postExpiredDate()),dcCore::app()->ctx->posts->post_tz)');
+            $res = sprintf($f, Date::class . '::rfc822(strtotime(App::frontend()->context()->posts->postExpiredDate()),App::frontend()->context()->posts->post_tz)');
         } elseif (!empty($attr['iso8601'])) {
-            $res = sprintf($f, Date::class . '::iso8601(strtotime(dcCore::app()->ctx->posts->postExpiredDate(),dcCore::app()->ctx->posts->post_tz)');
+            $res = sprintf($f, Date::class . '::iso8601(strtotime(App::frontend()->context()->posts->postExpiredDate(),App::frontend()->context()->posts->post_tz)');
         } elseif ($format) {
-            $res = sprintf($f, Date::class . "::dt2str('" . $format . "',dcCore::app()->ctx->posts->postExpiredDate())");
+            $res = sprintf($f, Date::class . "::dt2str('" . $format . "',App::frontend()->context()->posts->postExpiredDate())");
         } else {
-            $res = sprintf($f, Date::class . '::dt2str(dcCore::app()->blog->settings->system->date_format,dcCore::app()->ctx->posts->postExpiredDate())');
+            $res = sprintf($f, Date::class . '::dt2str(App::blog()->settings()->system->date_format,App::frontend()->context()->posts->postExpiredDate())');
         }
 
-        return '<?php if (null !== dcCore::app()->ctx->posts->postExpiredDate()) { echo ' . $res . '; } ?>';
+        return '<?php if (null !== App::frontend()->context()->posts->postExpiredDate()) { echo ' . $res . '; } ?>';
     }
 
     /**
@@ -89,13 +80,13 @@ class FrontendTemplate
     public static function EntryExpiredTime(ArrayObject $attr): string
     {
         return
-        '<?php if (null !== dcCore::app()->ctx->posts->postExpiredDate()) { echo ' . sprintf(
-            dcCore::app()->tpl->getFilters($attr),
+        '<?php if (null !== App::frontend()->context()->posts->postExpiredDate()) { echo ' . sprintf(
+            App::frontend()->template()->getFilters($attr),
             Date::class . '::dt2str(' .
             (
                 !empty($attr['format']) ?
-                "'" . addslashes($attr['format']) . "'" : 'dcCore::app()->blog->settings->system->time_format'
-            ) . ',dcCore::app()->ctx->posts->postExpiredDate())'
+                "'" . addslashes($attr['format']) . "'" : 'App::blog()->settings()->system->time_format'
+            ) . ',App::frontend()->context()->posts->postExpiredDate())'
         ) . '; } ?>';
     }
 }
diff --git a/src/My.php b/src/My.php
index cd28bdc..9329dc6 100644
--- a/src/My.php
+++ b/src/My.php
@@ -1,39 +1,23 @@
 <?php
-/**
- * @brief postExpired, a plugin for Dotclear 2
- *
- * @package Dotclear
- * @subpackage Plugin
- *
- * @author Jean-Christian Denis and Contributors
- *
- * @copyright Jean-Christian Denis
- * @copyright GPL-2.0 https://www.gnu.org/licenses/gpl-2.0.html
- */
+
 declare(strict_types=1);
 
 namespace Dotclear\Plugin\postExpired;
 
-use dcCore;
 use Dotclear\Module\MyPlugin;
 
 /**
- * This module definiton.
+ * @brief       postExpired My helper.
+ * @ingroup     postExpired
+ *
+ * @author      Jean-Christian Denis
+ * @copyright   GPL-2.0 https://www.gnu.org/licenses/gpl-2.0.html
  */
 class My extends MyPlugin
 {
     /** @var    string  This module meta type */
     public const META_TYPE = 'post_expired';
 
-    public static function checkCustomContext(int $context): ?bool
-    {
-        return $context !== My::BACKEND ? null :
-            defined('DC_CONTEXT_ADMIN')
-            && dcCore::app()->auth->check(dcCore::app()->auth->makePermissions([
-                dcCore::app()->auth::PERMISSION_CONTENT_ADMIN,
-            ]), dcCore::app()->blog->id);
-    }
-
     /**
      * Encode Expired Date settings.
      *
@@ -71,4 +55,6 @@ class My extends MyPlugin
 
         return $out;
     }
+
+    // Use default permissions
 }
diff --git a/src/RsExtPostExpired.php b/src/RsExtPostExpired.php
index b42a74c..abbd586 100644
--- a/src/RsExtPostExpired.php
+++ b/src/RsExtPostExpired.php
@@ -1,29 +1,21 @@
 <?php
-/**
- * @brief postExpired, a plugin for Dotclear 2
- *
- * @package Dotclear
- * @subpackage Plugin
- *
- * @author Jean-Christian Denis and Contributors
- *
- * @copyright Jean-Christian Denis
- * @copyright GPL-2.0 https://www.gnu.org/licenses/gpl-2.0.html
- */
+
 declare(strict_types=1);
 
 namespace Dotclear\Plugin\postExpired;
 
-use dcCore;
+use Dotclear\App;
 use Dotclear\Database\MetaRecord;
-use rsExtPost;
+use Dotclear\Schema\Extension\Post;
 
 /**
- * @ingroup DC_PLUGIN_POSTEXPIRED
- * @brief Scheduled post change - extends recordset.
- * @since 2.6
+ * @brief       postExpired record extension class.
+ * @ingroup     postExpired
+ *
+ * @author      Jean-Christian Denis
+ * @copyright   GPL-2.0 https://www.gnu.org/licenses/gpl-2.0.html
  */
-class rsExtPostExpired extends rsExtPost
+class rsExtPostExpired extends Post
 {
     /** @var    array   $memory     Memory to prevent redondant call */
     protected static array $memory = [];
@@ -38,7 +30,7 @@ class rsExtPostExpired extends rsExtPost
     public static function postExpiredDate(MetaRecord $rs): string
     {
         if (!static::$memory[$rs->f('post_id')]) {
-            $rs_date = dcCore::app()->meta->getMetadata([
+            $rs_date = App::meta()->getMetadata([
                 'meta_type' => My::META_TYPE,
                 'post_id'   => $rs->f('post_id'),
                 'limit'     => 1,