diff --git a/_define.php b/_define.php
index fb5f7c6..68b9220 100644
--- a/_define.php
+++ b/_define.php
@@ -20,7 +20,10 @@ $this->registerModule(
     'Jean-Christian Denis and contributors',
     '2023.04.23',
     [
-        'requires'    => [['core', '2.26']],
+        'requires' => [
+            ['php', '8.1'],
+            ['core', '2.26'],
+        ],
         'permissions' => dcCore::app()->auth->makePermissions([
             dcAuth::PERMISSION_USAGE,
             dcAuth::PERMISSION_CONTENT_ADMIN,
diff --git a/src/Backend.php b/src/Backend.php
index 0646c44..f5033b9 100644
--- a/src/Backend.php
+++ b/src/Backend.php
@@ -24,7 +24,6 @@ class Backend extends dcNsProcess
     public static function init(): bool
     {
         static::$init == defined('DC_CONTEXT_ADMIN')
-            && My::phpCompliant()
             && !is_null(dcCore::app()->blog) && !is_null(dcCore::app()->auth)
             && dcCore::app()->auth->check(dcCore::app()->auth->makePermissions([
                 dcCore::app()->auth::PERMISSION_USAGE,
diff --git a/src/Install.php b/src/Install.php
index abf6771..5fbe01d 100644
--- a/src/Install.php
+++ b/src/Install.php
@@ -24,7 +24,6 @@ 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::$init;
diff --git a/src/Manage.php b/src/Manage.php
index 22db30b..c1bf24a 100644
--- a/src/Manage.php
+++ b/src/Manage.php
@@ -33,7 +33,6 @@ class Manage extends dcNsProcess
     public static function init(): bool
     {
         static::$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_USAGE,
diff --git a/src/ManagePeriod.php b/src/ManagePeriod.php
index 4acc01f..9e5b681 100644
--- a/src/ManagePeriod.php
+++ b/src/ManagePeriod.php
@@ -43,7 +43,6 @@ class ManagePeriod 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_USAGE,
diff --git a/src/My.php b/src/My.php
index 4066154..b95a4a5 100644
--- a/src/My.php
+++ b/src/My.php
@@ -27,9 +27,6 @@ class My
     /** @var    string  This module meta type */
     public const META_TYPE = 'periodical';
 
-    /** @var    string  This module required php version */
-    public const PHP_MIN = '8.1';
-
     /**
      * This module id.
      */
@@ -56,14 +53,6 @@ class My
         return dirname(__DIR__);
     }
 
-    /**
-     * Check this module PHP version compliant.
-     */
-    public static function phpCompliant(): bool
-    {
-        return version_compare(phpversion(), self::PHP_MIN, '>=');
-    }
-
     /**
      * Periods action combo.
      *