diff --git a/views/layouts/main.php b/views/layouts/main.php
index e99b3c5..d1af295 100644
--- a/views/layouts/main.php
+++ b/views/layouts/main.php
@@ -16,6 +16,7 @@ AppAsset::register($this);
 <html lang="<?= Yii::$app->language ?>">
 <head>
 	<meta charset="<?= Yii::$app->charset ?>"/>
+	<meta name="viewport" content="width=device-width, initial-scale=1">
 	<title><?= Html::encode($this->title) ?></title>
 	<?php $this->head() ?>
 </head>
