diff --git a/README.md b/README.md
index 91256c4..131b109 100644
--- a/README.md
+++ b/README.md
@@ -149,6 +149,19 @@ return [
 ];
 ```
 
+> For class map module, add in your config/params.php file in your application.
+
+```php
+use App\YourClass;
+
+return [
+    'yii2.debug.classMap' => [
+        'class' => YourClass::class,
+    ],
+];
+```
+
+
 ## Testing
 
 [Check the documentation testing](/docs/testing.md) to learn about testing.
diff --git a/config/modules.php b/config/modules.php
index ebd6de2..c77fd6e 100644
--- a/config/modules.php
+++ b/config/modules.php
@@ -2,8 +2,6 @@
 
 declare(strict_types=1);
 
-use yii\debug\Module;
-
 /**
  * @var array $params
  */
@@ -14,7 +12,7 @@
         // configuration adjustments for 'dev' environment
         'modules' => [
             'debug' => [
-                'class' => Module::class,
+                'class' => $params['yii2.debug.classMap'] ?? \yii\debug\Module::class,
                 'allowedIPs' => $params['yii2.debug.allowedIPs'] ?? ['127.0.0.1', '::1'],
             ],
         ],