diff --git a/config/web.php b/config/web.php
index 9fbe87a..982536d 100644
--- a/config/web.php
+++ b/config/web.php
@@ -1,7 +1,5 @@
 <?php
 
-defined('YII_ENV') or define('YII_ENV', getenv('YII_ENV') ? getenv('YII_ENV') : 'dev');
-
 $config = [
     'id' => 'minetest-bower',
     'basePath' => dirname(__DIR__),
diff --git a/web/index.php b/web/index.php
index d1e070a..7b0ee4b 100644
--- a/web/index.php
+++ b/web/index.php
@@ -1,8 +1,7 @@
 <?php
 
-// comment out the following two lines when deployed to production
-defined('YII_DEBUG') or define('YII_DEBUG', true);
-defined('YII_ENV') or define('YII_ENV', 'dev');
+defined('YII_DEBUG') or define('YII_DEBUG', getenv('YII_DEBUG') ? (getenv('YII_DEBUG') == 'false' ? false : getenv('YII_DEBUG')) : true);
+defined('YII_ENV') or define('YII_ENV', getenv('YII_ENV') ? getenv('YII_ENV') : 'dev');
 
 require(__DIR__ . '/../vendor/autoload.php');
 require(__DIR__ . '/../vendor/yiisoft/yii2/Yii.php');