diff --git a/views/layouts/main.php b/views/layouts/main.php
index b0f613d..2974d6d 100644
--- a/views/layouts/main.php
+++ b/views/layouts/main.php
@@ -43,7 +43,7 @@ AppAsset::register($this);
                 ['label' => 'Login', 'url' => ['/site/login']]
             ) : (
                 '<li>'
-                . Html::beginForm(['/site/logout'], 'post')
+                . Html::beginForm(['/site/logout'], 'post', ['class' => 'navbar-form'])
                 . Html::submitButton(
                     'Logout (' . Yii::$app->user->identity->username . ')',
                     ['class' => 'btn btn-link']