diff --git a/yii2fullcalendar.php b/yii2fullcalendar.php
index 0998c65..cfd2f52 100644
--- a/yii2fullcalendar.php
+++ b/yii2fullcalendar.php
@@ -277,7 +277,7 @@ protected function getClientOptions()
         }");
                                                
         //add new theme information for the calendar                                       
-		$options['themeSytem'] = $this->themeSystem;
+		$options['themeSystem'] = $this->themeSystem;
                                                
         if ($this->eventRender){
             $options['eventRender'] = new JsExpression($this->eventRender);