diff --git a/CHANGELOG.md b/CHANGELOG.md
index 43c790b..d6e8a1b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,8 @@
+2023.07.29
+- require Dotclear 2.27
+- require PHP 7.4+
+- update to Dotclear 2.27-dev
+
 2023.04.23
 - require Dotclear 2.26
 - use latest dotclear namespace
diff --git a/README.md b/README.md
index cdc756e..c27c3a7 100644
--- a/README.md
+++ b/README.md
@@ -3,7 +3,7 @@
 [![Release](https://img.shields.io/github/v/release/JcDenis/simplyFavicon)](https://github.com/JcDenis/simplyFavicon/releases)
 [![Date](https://img.shields.io/github/release-date/JcDenis/simplyFavicon)](https://github.com/JcDenis/simplyFavicon/releases)
 [![Issues](https://img.shields.io/github/issues/JcDenis/simplyFavicon)](https://github.com/JcDenis/simplyFavicon/issues)
-[![Dotclear](https://img.shields.io/badge/dotclear-v2.26-blue.svg)](https://fr.dotclear.org/download)
+[![Dotclear](https://img.shields.io/badge/dotclear-v2.27-blue.svg)](https://fr.dotclear.org/download)
 [![Dotaddict](https://img.shields.io/badge/dotaddict-official-green.svg)](https://plugins.dotaddict.org/dc2/details/simplyFavicon)
 [![License](https://img.shields.io/github/license/JcDenis/simplyFavicon)](https://github.com/JcDenis/simplyFavicon/blob/master/LICENSE)
 
@@ -19,7 +19,8 @@ It adds a favicon to your blog.
 _simplyFavicon_ requires: 
 
  * Administrator permissions
- * Dotclear 2.26
+ * Dotclear 2.27
+ * PHP 7.4+
  * A readable public directory.
 
 ## USAGE
diff --git a/_define.php b/_define.php
index 80d6125..cb12f8f 100644
--- a/_define.php
+++ b/_define.php
@@ -10,7 +10,7 @@
  * @copyright Jean-Christian Denis
  * @copyright GPL-2.0 https://www.gnu.org/licenses/gpl-2.0.html
  */
-if (!defined('DC_RC_PATH') || is_null(dcCore::app()->auth)) {
+if (!defined('DC_RC_PATH')) {
     return;
 }
 
@@ -18,9 +18,9 @@ $this->registerModule(
     'Simply favicon',
     'Multi-agents favicon',
     'Jean-Christian Denis',
-    '2023.04.23',
+    '2023.07.29',
     [
-        'requires'    => [['core', '2.26']],
+        'requires'    => [['core', '2.27']],
         'permissions' => dcCore::app()->auth->makePermissions([
             dcCore::app()->auth::PERMISSION_ADMIN,
         ]),
diff --git a/dcstore.xml b/dcstore.xml
index b3f8665..3dfc682 100644
--- a/dcstore.xml
+++ b/dcstore.xml
@@ -2,11 +2,11 @@
 <modules xmlns:da="http://dotaddict.org/da/">
   <module id="simplyFavicon">
     <name>Simply favicon</name>
-    <version>2023.04.23</version>
+    <version>2023.07.29</version>
     <author>Jean-Christian Denis</author>
     <desc>Multi-agents favicon</desc>
-    <file>https://github.com/JcDenis/simplyFavicon/releases/download/v2023.04.23/plugin-simplyFavicon.zip</file>
-    <da:dcmin>2.26</da:dcmin>
+    <file>https://github.com/JcDenis/simplyFavicon/releases/download/v2023.07.29/plugin-simplyFavicon.zip</file>
+    <da:dcmin>2.27</da:dcmin>
     <da:details>http://plugins.dotaddict.org/dc2/details/simplyFavicon</da:details>
     <da:support>https://github.com/JcDenis/simplyFavicon</da:support>
   </module>
diff --git a/src/Backend.php b/src/Backend.php
index 8a45b45..1a822dd 100644
--- a/src/Backend.php
+++ b/src/Backend.php
@@ -15,8 +15,8 @@ declare(strict_types=1);
 namespace Dotclear\Plugin\simplyFavicon;
 
 use dcCore;
-use dcNsProcess;
 use dcSettings;
+use Dotclear\Core\Process;
 use Dotclear\Helper\File\Path;
 use Dotclear\Helper\Html\Form\{
     Checkbox,
@@ -26,18 +26,16 @@ use Dotclear\Helper\Html\Form\{
     Para
 };
 
-class Backend extends dcNsProcess
+class Backend extends Process
 {
     public static function init(): bool
     {
-        static::$init = defined('DC_CONTEXT_ADMIN');
-
-        return static::$init;
+        return self::status(My::checkContext(My::BACKEND));
     }
 
     public static function process(): bool
     {
-        if (!static::$init) {
+        if (!self::status()) {
             return false;
         }
 
diff --git a/src/Frontend.php b/src/Frontend.php
index b6b4179..8deb107 100644
--- a/src/Frontend.php
+++ b/src/Frontend.php
@@ -15,21 +15,19 @@ declare(strict_types=1);
 namespace Dotclear\Plugin\simplyFavicon;
 
 use dcCore;
-use dcNsProcess;
+use Dotclear\Core\Process;
 use Dotclear\Helper\File\Path;
 
-class Frontend extends dcNsProcess
+class Frontend extends Process
 {
     public static function init(): bool
     {
-        static::$init = defined('DC_RC_PATH');
-
-        return static::$init;
+        return self::status(My::checkContext(My::FRONTEND));
     }
 
     public static function process(): bool
     {
-        if (!static::$init) {
+        if (!self::status()) {
             return false;
         }
 
diff --git a/src/My.php b/src/My.php
new file mode 100644
index 0000000..4a6e9a1
--- /dev/null
+++ b/src/My.php
@@ -0,0 +1,21 @@
+<?php
+/**
+ * @brief simplyFavicon, a plugin for Dotclear 2
+ *
+ * @package Dotclear
+ * @subpackage Plugin
+ *
+ * @author Jean-Christian Denis
+ *
+ * @copyright Jean-Christian Denis
+ * @copyright GPL-2.0 https://www.gnu.org/licenses/gpl-2.0.html
+ */
+declare(strict_types=1);
+
+namespace Dotclear\Plugin\simplyFavicon;
+
+use Dotclear\Module\MyPlugin;
+
+class My extends MyPlugin
+{
+}
diff --git a/src/Prepend.php b/src/Prepend.php
index c42d964..0d47b33 100644
--- a/src/Prepend.php
+++ b/src/Prepend.php
@@ -15,20 +15,18 @@ declare(strict_types=1);
 namespace Dotclear\Plugin\simplyFavicon;
 
 use dcCore;
-use dcNsProcess;
+use Dotclear\Core\Process;
 
-class Prepend extends dcNsProcess
+class Prepend extends Process
 {
     public static function init(): bool
     {
-        static::$init = true;
-
-        return static::$init;
+        return self::status(My::checkContext(My::PREPEND));
     }
 
     public static function process(): bool
     {
-        if (!static::$init) {
+        if (!self::status()) {
             return false;
         }