diff --git a/views/artbox_comment_form.php b/views/artbox_comment_form.php
index 46b8132..108e3fd 100755
--- a/views/artbox_comment_form.php
+++ b/views/artbox_comment_form.php
@@ -14,6 +14,7 @@
      * @var string           $formId
      * @var View             $this
      * @var RatingModel|NULL $rating_model
+     * @var string           $buttonClass
      */
     $form = ActiveForm::begin(
         [
@@ -59,9 +60,10 @@
           echo Html::tag(
               'div',
               Html::submitButton(
-                Yii::t('app', 'Submit comment')
+                Yii::t('app', 'Submit comment'),
+                  (!empty($buttonClass) ? ['class' => $buttonClass] : [])
               ),
-              [ 'class' => 'input_bl submit_btn' ]
+              [ 'class' => 'input_bl submit_btn'  ]
           );
       ?>
   </div>
diff --git a/widgets/CommentWidget.php b/widgets/CommentWidget.php
index 0c47bd6..c12cd3f 100755
--- a/widgets/CommentWidget.php
+++ b/widgets/CommentWidget.php
@@ -215,6 +215,12 @@
         /**
          * Initializes the widget params.
          */
+    
+        /**
+         * Class for button
+         * @var string
+         */
+        public $buttonClass = '';
         public function init()
         {
             // Module init
@@ -384,6 +390,7 @@
                         'model'         => $this->getModel(),
                         'formId'        => $this->formId,
                         'rating_model'  => $ratingModel,
+                        'buttonClass'   => $this->buttonClass
                         
                     ]
                 ),
--
libgit2 0.21.4