diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3d0b9b2..a441188 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,9 @@
+topWriter 1.4 - 2023.10.20
+===========================================================
+* Require Dotclear 2.28
+* Require PHP 8.1
+* Upgrade to Dotclear 2.28
+
 topWriter 1.3 - 2023.08.13
 ===========================================================
 * Require Dotclear 2.27
diff --git a/README.md b/README.md
index 20a51fc..492a1ac 100644
--- a/README.md
+++ b/README.md
@@ -1,25 +1,22 @@
 # README
 
-[![Release](https://img.shields.io/badge/release-1.3-a2cbe9.svg)](https://git.dotclear.watch/JcDenis/topWriter/releases)
-[![Date](https://img.shields.io/badge/date-2023.08.13-c44d58.svg)](https://git.dotclear.watch/JcDenis/topWriter/releases)
-[![Dotclear](https://img.shields.io/badge/dotclear-v2.27-137bbb.svg)](https://fr.dotclear.org/download)
+[![Release](https://img.shields.io/badge/release-1.4-a2cbe9.svg)](https://git.dotclear.watch/JcDenis/topWriter/releases)
+![Date](https://img.shields.io/badge/date-2023.10.20-c44d58.svg)
+[![Dotclear](https://img.shields.io/badge/dotclear-v2.28-137bbb.svg)](https://fr.dotclear.org/download)
 [![Dotaddict](https://img.shields.io/badge/dotaddict-official-9ac123.svg)](https://plugins.dotaddict.org/dc2/details/topWriter)
-[![License](https://img.shields.io/github/license/JcDenis/topWriter)](https://git.dotclear.watch/JcDenis/topWriter/blob/master/LICENSE)
+[![License](https://img.shields.io/badge/license-GPL--2.0-ececec.svg)](https://git.dotclear.watch/JcDenis/topWriter/src/branch/master/LICENSE)
 
-## WHAT IS TOPWRITER ?
+## ABOUT
 
-_Top writer_ is a plugin for the open-source 
-web publishing software called Dotclear.
+_topWriter_ is a plugin for the open-source web publishing software called [Dotclear](https://www.dotclear.org).
 
-Show most active contributor on a widget.
+> Show most active contributor on a widget.
 
 ## REQUIREMENTS
 
-_topWriter_ requires: 
-
-* permissions to manage widgets
-* Dotclear 2.27
-* PHP 7.4
+* Dotclear 2.28
+* PHP 8.1
+* Dotclear permissions to manage widgets
 
 ## USAGE
 
@@ -32,10 +29,11 @@ Or add contents to the backend dashboard from your preferences.
 
 ## 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/topWriter) or [GitHub Page](https://github.com/JcDenis/topWriter)
-* Packages & details: [Gitea Page](https://git.dotclear.watch/JcDenis/topWriter/releases) or [Dotaddict Page](https://plugins.dotaddict.org/dc2/details/topWriter)
-* Discuss and help : [Dotclear Forum](http://forum.dotclear.org/viewtopic.php?pid=333002#p333002)
+* [License](https://git.dotclear.watch/JcDenis/topWriter/src/branch/master/LICENSE)
+* [Packages & details](https://git.dotclear.watch/JcDenis/topWriter/releases) (or on [Dotaddict](https://plugins.dotaddict.org/dc2/details/topWriter))
+* [Sources & contributions](https://git.dotclear.watch/JcDenis/topWriter) (or on [GitHub](https://github.com/JcDenis/topWriter))
+* [Issues & security](https://git.dotclear.watch/JcDenis/topWriter/issues) (or on [GitHub](https://github.com/JcDenis/topWriter/issues))
+* [Discuss & help](http://forum.dotclear.org/viewtopic.php?pid=333002#p333002)
 
 ## CONTRIBUTORS
 
diff --git a/_define.php b/_define.php
index 51c542e..19ce569 100644
--- a/_define.php
+++ b/_define.php
@@ -1,32 +1,29 @@
 <?php
 /**
- * @brief topWriter, a plugin for Dotclear 2
+ * @file
+ * @brief       The plugin topWriter definition
+ * @ingroup     topWriter
  *
- * @package Dotclear
- * @subpackage Plugin
+ * @defgroup    topWriter Plugin topWriter.
  *
- * @author Jean-Christian Denis, Pierre Van Glabeke
+ * Ranking of the most prolific writers and/or commentators.
  *
- * @copyright Jean-Christian Denis
- * @copyright GPL-2.0 https://www.gnu.org/licenses/gpl-2.0.html
+ * @author      Jean-Christian Denis
+ * @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(
     'Top writer',
     'Ranking of the most prolific writers and/or commentators',
     'Jean-Christian Denis, Pierre Van Glabeke',
-    '1.3',
+    '1.4',
     [
-        'requires'    => [['core', '2.27']],
-        'permissions' => dcCore::app()->auth->makePermissions([
-            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 58542aa..35444e0 100644
--- a/dcstore.xml
+++ b/dcstore.xml
@@ -2,11 +2,11 @@
 <modules xmlns:da="http://dotaddict.org/da/">
   <module id="topWriter">
     <name>Top writer</name>
-    <version>1.3</version>
+    <version>1.4</version>
     <author>Jean-Christian Denis, Pierre Van Glabeke</author>
     <desc>Ranking of the most prolific writers and/or commentators</desc>
-    <file>https://git.dotclear.watch/JcDenis/topWriter/releases/download/v1.3/plugin-topWriter.zip</file>
-    <da:dcmin>2.27</da:dcmin>
+    <file>https://git.dotclear.watch/JcDenis/topWriter/releases/download/v1.4/plugin-topWriter.zip</file>
+    <da:dcmin>2.28</da:dcmin>
     <da:details>https://git.dotclear.watch/JcDenis/topWriter/src/branch/master/README.md</da:details>
     <da:support>https://git.dotclear.watch/JcDenis/topWriter/issues</da:support>
   </module>
diff --git a/src/Backend.php b/src/Backend.php
index 67ce112..7725a0c 100644
--- a/src/Backend.php
+++ b/src/Backend.php
@@ -1,22 +1,19 @@
 <?php
-/**
- * @brief topWriter, a plugin for Dotclear 2
- *
- * @package Dotclear
- * @subpackage Plugin
- *
- * @author Jean-Christian Denis, Pierre Van Glabeke
- *
- * @copyright Jean-Christian Denis
- * @copyright GPL-2.0 https://www.gnu.org/licenses/gpl-2.0.html
- */
+
 declare(strict_types=1);
 
 namespace Dotclear\Plugin\topWriter;
 
-use dcCore;
+use Dotclear\App;
 use Dotclear\Core\Process;
 
+/**
+ * @brief       topWriter backend class.
+ * @ingroup     topWriter
+ *
+ * @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
@@ -30,11 +27,11 @@ class Backend extends Process
             return false;
         }
 
-        dcCore::app()->addBehaviors([
-            'adminDashboardItemsV2'            => [BackendBehaviors::class, 'adminDashboardItemsV2'],
-            'adminDashboardOptionsFormV2'      => [BackendBehaviors::class, 'adminDashboardOptionsFormV2'],
-            'adminAfterDashboardOptionsUpdate' => [BackendBehaviors::class, 'adminAfterDashboardOptionsUpdate'],
-            'initWidgets'                      => [Widgets::class, 'initWidgets'],
+        App::behavior()->addBehaviors([
+            'adminDashboardItemsV2'            => BackendBehaviors::adminDashboardItemsV2(...),
+            'adminDashboardOptionsFormV2'      => BackendBehaviors::adminDashboardOptionsFormV2(...),
+            'adminAfterDashboardOptionsUpdate' => BackendBehaviors::adminAfterDashboardOptionsUpdate(...),
+            'initWidgets'                      => Widgets::initWidgets(...),
         ]);
 
         return true;
diff --git a/src/BackendBehaviors.php b/src/BackendBehaviors.php
index d2b4074..679a41c 100644
--- a/src/BackendBehaviors.php
+++ b/src/BackendBehaviors.php
@@ -1,21 +1,11 @@
 <?php
-/**
- * @brief topWriter, a plugin for Dotclear 2
- *
- * @package Dotclear
- * @subpackage Plugin
- *
- * @author Jean-Christian Denis, Pierre Van Glabeke
- *
- * @copyright Jean-Christian Denis
- * @copyright GPL-2.0 https://www.gnu.org/licenses/gpl-2.0.html
- */
+
 declare(strict_types=1);
 
 namespace Dotclear\Plugin\topWriter;
 
 use ArrayObject;
-use dcCore;
+use Dotclear\App;
 use Dotclear\Helper\Html\Form\{
     Checkbox,
     Div,
@@ -28,9 +18,11 @@ use Dotclear\Helper\Html\Form\{
 use Dotclear\Helper\Html\Html;
 
 /**
- * @ingroup DC_PLUGIN_TOPWRITER
- * @brief Display most active users - admin methods.
- * @since 2.6
+ * @brief       topWriter backend behaviors class.
+ * @ingroup     topWriter
+ *
+ * @author      Jean-Christian Denis
+ * @copyright   GPL-2.0 https://www.gnu.org/licenses/gpl-2.0.html
  */
 class BackendBehaviors
 {
@@ -114,33 +106,33 @@ class BackendBehaviors
 
     public static function adminAfterDashboardOptionsUpdate(?string $user_id): void
     {
-        dcCore::app()->auth->user_prefs->get('dashboard')->put(
+        App::auth()->prefs()->get('dashboard')->put(
             'topWriterPostsItems',
             !empty($_POST['topWriterPostsItems']),
             'boolean'
         );
-        dcCore::app()->auth->user_prefs->get('dashboard')->put(
+        App::auth()->prefs()->get('dashboard')->put(
             'topWriterPostsPeriod',
             (string) $_POST['topWriterPostsPeriod'],
             'string'
         );
-        dcCore::app()->auth->user_prefs->get('dashboard')->put(
+        App::auth()->prefs()->get('dashboard')->put(
             'topWriterPostsLimit',
             (int) $_POST['topWriterPostsLimit'],
             'integer'
         );
 
-        dcCore::app()->auth->user_prefs->get('dashboard')->put(
+        App::auth()->prefs()->get('dashboard')->put(
             'topWriterCommentsItems',
             !empty($_POST['topWriterCommentsItems']),
             'boolean'
         );
-        dcCore::app()->auth->user_prefs->get('dashboard')->put(
+        App::auth()->prefs()->get('dashboard')->put(
             'topWriterCommentsPeriod',
             (string) $_POST['topWriterCommentsPeriod'],
             'string'
         );
-        dcCore::app()->auth->user_prefs->get('dashboard')->put(
+        App::auth()->prefs()->get('dashboard')->put(
             'topWriterCommentsLimit',
             (int) $_POST['topWriterCommentsLimit'],
             'integer'
@@ -149,43 +141,43 @@ class BackendBehaviors
 
     private static function setDefaultPref(): array
     {
-        if (!dcCore::app()->auth->user_prefs->get('dashboard')->prefExists('topWriterPostsItems')) {
-            dcCore::app()->auth->user_prefs->get('dashboard')->put(
+        if (!App::auth()->prefs()->get('dashboard')->prefExists('topWriterPostsItems')) {
+            App::auth()->prefs()->get('dashboard')->put(
                 'topWriterPostsItems',
                 false,
                 'boolean'
             );
         }
-        if (!dcCore::app()->auth->user_prefs->get('dashboard')->prefExists('topWriterPostsPeriod')) {
-            dcCore::app()->auth->user_prefs->get('dashboard')->put(
+        if (!App::auth()->prefs()->get('dashboard')->prefExists('topWriterPostsPeriod')) {
+            App::auth()->prefs()->get('dashboard')->put(
                 'topWriterPostsPeriod',
                 'month',
                 'string'
             );
         }
-        if (!dcCore::app()->auth->user_prefs->get('dashboard')->prefExists('topWriterPostsLimit')) {
-            dcCore::app()->auth->user_prefs->get('dashboard')->put(
+        if (!App::auth()->prefs()->get('dashboard')->prefExists('topWriterPostsLimit')) {
+            App::auth()->prefs()->get('dashboard')->put(
                 'topWriterPostsLimit',
                 10,
                 'integer'
             );
         }
-        if (!dcCore::app()->auth->user_prefs->get('dashboard')->prefExists('topWriterCommentsItems')) {
-            dcCore::app()->auth->user_prefs->get('dashboard')->put(
+        if (!App::auth()->prefs()->get('dashboard')->prefExists('topWriterCommentsItems')) {
+            App::auth()->prefs()->get('dashboard')->put(
                 'topWriterCommentsItems',
                 false,
                 'boolean'
             );
         }
-        if (!dcCore::app()->auth->user_prefs->get('dashboard')->prefExists('topWriterCommentsPeriod')) {
-            dcCore::app()->auth->user_prefs->get('dashboard')->put(
+        if (!App::auth()->prefs()->get('dashboard')->prefExists('topWriterCommentsPeriod')) {
+            App::auth()->prefs()->get('dashboard')->put(
                 'topWriterCommentsPeriod',
                 'month',
                 'string'
             );
         }
-        if (!dcCore::app()->auth->user_prefs->get('dashboard')->prefExists('topWriterCommentsLimit')) {
-            dcCore::app()->auth->user_prefs->get('dashboard')->put(
+        if (!App::auth()->prefs()->get('dashboard')->prefExists('topWriterCommentsLimit')) {
+            App::auth()->prefs()->get('dashboard')->put(
                 'topWriterCommentsLimit',
                 10,
                 'integer'
@@ -193,12 +185,12 @@ class BackendBehaviors
         }
 
         return [
-            'topWriterPostsItems'     => dcCore::app()->auth->user_prefs->get('dashboard')->get('topWriterPostsItems'),
-            'topWriterPostsPeriod'    => dcCore::app()->auth->user_prefs->get('dashboard')->get('topWriterPostsPeriod'),
-            'topWriterPostsLimit'     => dcCore::app()->auth->user_prefs->get('dashboard')->get('topWriterPostsLimit') ?? 10,
-            'topWriterCommentsItems'  => dcCore::app()->auth->user_prefs->get('dashboard')->get('topWriterCommentsItems'),
-            'topWriterCommentsPeriod' => dcCore::app()->auth->user_prefs->get('dashboard')->get('topWriterCommentsPeriod'),
-            'topWriterCommentsLimit'  => dcCore::app()->auth->user_prefs->get('dashboard')->get('topWriterCommentsLimit') ?? 10,
+            'topWriterPostsItems'     => App::auth()->prefs()->get('dashboard')->get('topWriterPostsItems'),
+            'topWriterPostsPeriod'    => App::auth()->prefs()->get('dashboard')->get('topWriterPostsPeriod'),
+            'topWriterPostsLimit'     => App::auth()->prefs()->get('dashboard')->get('topWriterPostsLimit') ?? 10,
+            'topWriterCommentsItems'  => App::auth()->prefs()->get('dashboard')->get('topWriterCommentsItems'),
+            'topWriterCommentsPeriod' => App::auth()->prefs()->get('dashboard')->get('topWriterCommentsPeriod'),
+            'topWriterCommentsLimit'  => App::auth()->prefs()->get('dashboard')->get('topWriterCommentsLimit') ?? 10,
         ];
     }
 }
diff --git a/src/Frontend.php b/src/Frontend.php
index 2a64b6b..8ab68f8 100644
--- a/src/Frontend.php
+++ b/src/Frontend.php
@@ -1,22 +1,19 @@
 <?php
-/**
- * @brief topWriter, a plugin for Dotclear 2
- *
- * @package Dotclear
- * @subpackage Plugin
- *
- * @author Jean-Christian Denis, Pierre Van Glabeke
- *
- * @copyright Jean-Christian Denis
- * @copyright GPL-2.0 https://www.gnu.org/licenses/gpl-2.0.html
- */
+
 declare(strict_types=1);
 
 namespace Dotclear\Plugin\topWriter;
 
-use dcCore;
+use Dotclear\App;
 use Dotclear\Core\Process;
 
+/**
+ * @brief       topWriter frontend class.
+ * @ingroup     topWriter
+ *
+ * @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
@@ -30,9 +27,7 @@ class Frontend extends Process
             return false;
         }
 
-        dcCore::app()->addBehaviors([
-            'initWidgets' => [Widgets::class, 'initWidgets'],
-        ]);
+        App::behavior()->addBehavior('initWidgets', Widgets::initWidgets(...));
 
         return true;
     }
diff --git a/src/My.php b/src/My.php
index f1ae0e5..3f22d1e 100644
--- a/src/My.php
+++ b/src/My.php
@@ -1,21 +1,19 @@
 <?php
-/**
- * @brief topWriter, a plugin for Dotclear 2
- *
- * @package Dotclear
- * @subpackage Plugin
- *
- * @author Jean-Christian Denis, Pierre Van Glabeke
- *
- * @copyright Jean-Christian Denis
- * @copyright GPL-2.0 https://www.gnu.org/licenses/gpl-2.0.html
- */
+
 declare(strict_types=1);
 
 namespace Dotclear\Plugin\topWriter;
 
 use Dotclear\Module\MyPlugin;
 
+/**
+ * @brief       topWriter My helper.
+ * @ingroup     topWriter
+ *
+ * @author      Jean-Christian Denis
+ * @copyright   GPL-2.0 https://www.gnu.org/licenses/gpl-2.0.html
+ */
 class My extends MyPlugin
 {
+    // Use default persmissions
 }
diff --git a/src/Utils.php b/src/Utils.php
index c3c9c29..7657e29 100644
--- a/src/Utils.php
+++ b/src/Utils.php
@@ -1,41 +1,34 @@
 <?php
-/**
- * @brief topWriter, a plugin for Dotclear 2
- *
- * @package Dotclear
- * @subpackage Plugin
- *
- * @author Jean-Christian Denis, Pierre Van Glabeke
- *
- * @copyright Jean-Christian Denis
- * @copyright GPL-2.0 https://www.gnu.org/licenses/gpl-2.0.html
- */
+
 declare(strict_types=1);
 
 namespace Dotclear\Plugin\topWriter;
 
-use dcAuth;
-use dcBlog;
-use dcCore;
-use dcUtils;
+use Dotclear\App;
 use Dotclear\Database\Statement\{
     JoinStatement,
     SelectStatement
 };
 use Dotclear\Helper\Date;
 
+/**
+ * @brief       topWriter utils class.
+ * @ingroup     topWriter
+ *
+ * @author      Jean-Christian Denis
+ * @copyright   GPL-2.0 https://www.gnu.org/licenses/gpl-2.0.html
+ */
 class Utils
 {
     public static function posts(string $period, int $limit, bool $sort_desc = true): array
     {
-        // nullsafe
-        if (is_null(dcCore::app()->blog)) {
+        if (!App::blog()->isDefined()) {
             return [];
         }
 
         $sql = new SelectStatement();
         $sql
-            ->from($sql->as(dcCore::app()->prefix . dcBlog::POST_TABLE_NAME, 'P'))
+            ->from($sql->as(App::con()->prefix() . App::blog()::POST_TABLE_NAME, 'P'))
             ->columns([
                 $sql->count('*', 'count'),
                 'U.user_id',
@@ -43,12 +36,12 @@ class Utils
             ->join(
                 (new JoinStatement())
                     ->inner()
-                    ->from($sql->as(dcCore::app()->prefix . dcAuth::USER_TABLE_NAME, 'U'))
+                    ->from($sql->as(App::con()->prefix() . App::auth()::USER_TABLE_NAME, 'U'))
                     ->on('U.user_id = P.user_id')
                     ->statement()
             )
-            ->where('blog_id = ' . $sql->quote(dcCore::app()->blog->id))
-            ->and('post_status = ' . dcBlog::POST_PUBLISHED)
+            ->where('blog_id = ' . $sql->quote(App::blog()->id()))
+            ->and('post_status = ' . App::blog()::POST_PUBLISHED)
             ->and('user_status = 1')
             ->group('U.user_id')
             ->order('count ' . ($sort_desc ? 'DESC' : 'ASC') . ' , U.user_id ASC')
@@ -67,7 +60,7 @@ class Utils
         while ($rs->fetch()) {
             $sql  = new SelectStatement();
             $user = $sql
-                ->from(dcCore::app()->prefix . dcAuth::USER_TABLE_NAME)
+                ->from(App::con()->prefix() . App::auth()::USER_TABLE_NAME)
                 ->column('*')
                 ->where('user_id = ' . $sql->quote($rs->f('user_id')))
                 ->select();
@@ -76,7 +69,7 @@ class Utils
                 continue;
             }
 
-            $author = dcUtils::getUserCN(
+            $author = App::users()->getUserCN(
                 $user->f('user_id'),
                 $user->f('user_name'),
                 $user->f('user_firstname'),
@@ -87,9 +80,9 @@ class Utils
             }
 
             $i++;
-            if (dcCore::app()->blog->settings->get('authormode')->get('authormode_active')) {
+            if (App::blog()->settings()->get('authormode')->get('authormode_active')) {
                 $res[$i]['author_link'] = '<a href="' .
-                    dcCore::app()->blog->url . dcCore::app()->url->getBase('author') . '/' . $user->f('user_id') . '" ' .
+                    App::blog()->url() . App::url()->getBase('author') . '/' . $user->f('user_id') . '" ' .
                     'title="' . __('Author posts') . '">' . $author . '</a>';
             } elseif ($user->f('user_url')) {
                 $res[$i]['author_link'] = '<a href="' . $user->f('user_url') . '" title="' .
@@ -109,23 +102,22 @@ class Utils
 
     public static function comments(string $period, int $limit, bool $sort_desc = true, bool $exclude = false): array
     {
-        // nullsafe
-        if (is_null(dcCore::app()->blog)) {
+        if (!App::blog()->isDefined()) {
             return [];
         }
 
         $sql = new SelectStatement();
         $sql
-            ->from($sql->as(dcCore::app()->prefix . dcBlog::POST_TABLE_NAME, 'P'))
-            ->from($sql->as(dcCore::app()->prefix . dcBlog::COMMENT_TABLE_NAME, 'C'))
+            ->from($sql->as(App::con()->prefix() . App::blog()::POST_TABLE_NAME, 'P'))
+            ->from($sql->as(App::con()->prefix() . App::blog()::COMMENT_TABLE_NAME, 'C'))
             ->columns([
                 $sql->count('*', 'count'),
                 'comment_email',
             ])
-            ->where('blog_id = ' . $sql->quote(dcCore::app()->blog->id))
+            ->where('blog_id = ' . $sql->quote(App::blog()->id()))
             ->and('P.post_id = C.post_id')
-            ->and('post_status = ' . dcBlog::POST_PUBLISHED)
-            ->and('comment_status = ' . dcBlog::COMMENT_PUBLISHED)
+            ->and('post_status = ' . App::blog()::POST_PUBLISHED)
+            ->and('comment_status = ' . App::blog()::COMMENT_PUBLISHED)
             ->group('comment_email')
             ->order('count ' . ($sort_desc ? 'DESC' : 'ASC'))
             ->limit(abs((int) $limit))
@@ -136,16 +128,16 @@ class Utils
         if ($exclude) {
             $sql->and('comment_email NOT IN (' .
                 (new SelectStatement())
-                    ->from($sql->as(dcCore::app()->prefix . dcAuth::USER_TABLE_NAME, 'U'))
+                    ->from($sql->as(App::con()->prefix() . App::auth()::USER_TABLE_NAME, 'U'))
                     ->column('U.user_email')
                     ->join(
                         (new JoinStatement())
                             ->inner()
-                            ->from($sql->as(dcCore::app()->prefix . dcBlog::POST_TABLE_NAME, 'P'))
+                            ->from($sql->as(App::con()->prefix() . App::blog()::POST_TABLE_NAME, 'P'))
                             ->on('P.user_id = U.user_id')
                             ->statement()
                     )
-                    ->where('blog_id = ' . $sql->quote(dcCore::app()->blog->id))
+                    ->where('blog_id = ' . $sql->quote(App::blog()->id()))
                     ->group('U.user_email')
                     ->statement() .
             ')');
@@ -161,7 +153,7 @@ class Utils
         while ($rs->fetch()) {
             $sql  = new SelectStatement();
             $user = $sql
-                ->from(dcCore::app()->prefix . dcBlog::COMMENT_TABLE_NAME)
+                ->from(App::con()->prefix() . App::blog()::COMMENT_TABLE_NAME)
                 ->column('*')
                 ->where('comment_email = ' . $sql->quote($rs->f('comment_email')))
                 ->order('comment_dt DESC')
diff --git a/src/Widgets.php b/src/Widgets.php
index 3397e5f..0fe43af 100644
--- a/src/Widgets.php
+++ b/src/Widgets.php
@@ -1,24 +1,21 @@
 <?php
-/**
- * @brief topWriter, a plugin for Dotclear 2
- *
- * @package Dotclear
- * @subpackage Plugin
- *
- * @author Jean-Christian Denis, Pierre Van Glabeke
- *
- * @copyright Jean-Christian Denis
- * @copyright GPL-2.0 https://www.gnu.org/licenses/gpl-2.0.html
- */
+
 declare(strict_types=1);
 
 namespace Dotclear\Plugin\topWriter;
 
-use dcCore;
+use Dotclear\App;
 use Dotclear\Helper\Html\Html;
 use Dotclear\Plugin\widgets\WidgetsStack;
 use Dotclear\Plugin\widgets\WidgetsElement;
 
+/**
+ * @brief       topWriter widgets class.
+ * @ingroup     topWriter
+ *
+ * @author      Jean-Christian Denis
+ * @copyright   GPL-2.0 https://www.gnu.org/licenses/gpl-2.0.html
+ */
 class Widgets
 {
     public static function initWidgets(WidgetsStack $w): void
@@ -28,7 +25,7 @@ class Widgets
             ->create(
                 'topcom',
                 __('Top writer: comments'),
-                [self::class, 'topComWidget'],
+                self::topComWidget(...),
                 null,
                 __('List users who write more comments')
             )
@@ -78,7 +75,7 @@ class Widgets
             ->create(
                 'toppost',
                 __('Top writer: entries'),
-                [self::class, 'topPostWidget'],
+                self::topPostWidget(...),
                 null,
                 __('List users who write more posts')
             )
@@ -120,7 +117,7 @@ class Widgets
 
     public static function topComWidget(WidgetsElement $w): string
     {
-        if ($w->offline || !$w->checkHomeOnly(dcCore::app()->url->type)) {
+        if ($w->offline || !$w->checkHomeOnly(App::url()->type)) {
             return '';
         }
 
@@ -140,7 +137,7 @@ class Widgets
 
     public static function topPostWidget(WidgetsElement $w): string
     {
-        if ($w->offline || !$w->checkHomeOnly(dcCore::app()->url->type)) {
+        if ($w->offline || !$w->checkHomeOnly(App::url()->type)) {
             return '';
         }