diff --git a/_define.php b/_define.php
index 62f13cb..66bd162 100644
--- a/_define.php
+++ b/_define.php
@@ -20,7 +20,10 @@ $this->registerModule(
     'Jean-Christian Denis and Contributors',
     '2023.04.23',
     [
-        'requires'    => [['core', '2.26']],
+        'requires'    => [
+            ['php', '8.1'],
+            ['core', '2.26'],
+        ],
         'permissions' => dcCore::app()->auth->makePermissions([
             dcAuth::PERMISSION_CONTENT_ADMIN,
         ]),
diff --git a/src/Backend.php b/src/Backend.php
index 9c4f57d..99a75fd 100644
--- a/src/Backend.php
+++ b/src/Backend.php
@@ -33,7 +33,6 @@ class Backend extends dcNsProcess
     public static function init(): bool
     {
         static::$init = defined('DC_CONTEXT_ADMIN')
-            && My::phpCompliant()
             && !is_null(dcCore::app()->auth) && !is_null(dcCore::app()->blog)
             && dcCore::app()->auth->check(dcCore::app()->auth->makePermissions([
                 dcCore::app()->auth::PERMISSION_CONTENT_ADMIN,
diff --git a/src/Frontend.php b/src/Frontend.php
index 6099393..74cb2c5 100644
--- a/src/Frontend.php
+++ b/src/Frontend.php
@@ -22,7 +22,7 @@ class Frontend extends dcNsProcess
 {
     public static function init(): bool
     {
-        static::$init = My::phpCompliant();
+        static::$init = defined('DC_RC_PATH');
 
         return static::$init;
     }
diff --git a/src/Install.php b/src/Install.php
index 856bacb..3aa2db1 100644
--- a/src/Install.php
+++ b/src/Install.php
@@ -25,7 +25,6 @@ class Install extends dcNsProcess
     public static function init(): bool
     {
         static::$init = defined('DC_CONTEXT_ADMIN')
-            && My::phpCompliant()
             && dcCore::app()->newVersion(My::id(), dcCore::app()->plugins->moduleInfo(My::id(), 'version'));
 
         return static::$init;
diff --git a/src/Manage.php b/src/Manage.php
index 387fe04..806c983 100644
--- a/src/Manage.php
+++ b/src/Manage.php
@@ -42,7 +42,6 @@ class Manage extends dcNsProcess
     public static function init(): bool
     {
         static::$init = defined('DC_CONTEXT_ADMIN')
-            && My::phpCompliant()
             && !is_null(dcCore::app()->auth) && !is_null(dcCore::app()->blog)
             && dcCore::app()->auth->check(dcCore::app()->auth->makePermissions([
                 dcCore::app()->auth::PERMISSION_CONTENT_ADMIN,
diff --git a/src/My.php b/src/My.php
index 4043e14..9847dca 100644
--- a/src/My.php
+++ b/src/My.php
@@ -38,9 +38,6 @@ class My
         Filter\EpcFilterTwitter::class,
     ];
 
-    /** @var    string  This module required php version */
-    public const PHP_MIN = '8.1';
-
     /**
      * This module id.
      */
@@ -66,12 +63,4 @@ class My
     {
         return dirname(__DIR__);
     }
-
-    /**
-     * Check this module PHP version compliant.
-     */
-    public static function phpCompliant(): bool
-    {
-        return version_compare(phpversion(), self::PHP_MIN, '>=');
-    }
 }
diff --git a/src/Prepend.php b/src/Prepend.php
index 7e30265..3e4d81b 100644
--- a/src/Prepend.php
+++ b/src/Prepend.php
@@ -22,7 +22,7 @@ class Prepend extends dcNsProcess
 {
     public static function init(): bool
     {
-        static::$init = My::phpCompliant();
+        static::$init = defined('DC_RC_PATH');
 
         return static::$init;
     }