diff --git a/README.md b/README.md
index 4c9760b..77940d1 100644
--- a/README.md
+++ b/README.md
@@ -11,11 +11,19 @@ Before installing this extension. You need to install [gajus/dindent](https://gi
 composer require gajus/dindent
 ```
 
+
 ## Configuration
 
 Edit `app/config/extension/htmlindenter.xiaohutai.yml` for options:
 
-- indentation_character`: Characters used for indentation. Defaults to 4 spaces.
+- `enabled`: Whether to do anything at all or not. Defaults to `true`.
+- `indentation_character`: Characters used for indentation. Defaults to 4 spaces.
 - `blocks`: List of HTML elements that will be output as blocks, such as `div`.
 - `inline`: List of HTML elements that will be output as inline, such as `span`.
 - `minify`: Overrides everything and minify HTML. Defaults to `false`.
+
+
+## References
+
+- Based on [gajus/dindent](https://github.com/gajus/dindent).
+- Based on [dactivo/Bolt.cm-HTML-minifier](https://github.com/dactivo/Bolt.cm-HTML-minifier).
diff --git a/config/config.yml.dist b/config/config.yml.dist
index ca5cf45..3ca9036 100644
--- a/config/config.yml.dist
+++ b/config/config.yml.dist
@@ -1,3 +1,4 @@
+enabled: true
 indentation_character: '    '
 blocks: [ 'div' ]
 inline: [ 'p', 'h1', 'h2', 'h3', 'h4', 'h5', 'h6' ]
diff --git a/src/HtmlIndenterExtension.php b/src/HtmlIndenterExtension.php
index 4d92cfe..5becfde 100644
--- a/src/HtmlIndenterExtension.php
+++ b/src/HtmlIndenterExtension.php
@@ -19,18 +19,11 @@ class HtmlIndenterExtension extends SimpleExtension
      */
     protected function subscribe(EventDispatcherInterface $dispatcher)
     {
-        /*
-        // Only when debug is OFF
-        $app = $this->getContainer();
-        $config = $app['config'];
-        $debug = $config->get('general/debug');
-
-        if (! $debug) {
-            $dispatcher->addListener(KernelEvents::RESPONSE, [$this, 'onKernelResponse']);
-        }
-        //*/
+        $config = $this->getConfig();
 
-        $dispatcher->addListener(KernelEvents::RESPONSE, [ $this, 'onKernelResponse' ]);
+        if ($config['enabled']) {
+            $dispatcher->addListener(KernelEvents::RESPONSE, [ $this, 'onKernelResponse' ]);
+        }
     }
 
     /**