diff --git a/ViewerJsAssets.php b/ViewerJsAssets.php
index ce47d63..7bf3699 100644
--- a/ViewerJsAssets.php
+++ b/ViewerJsAssets.php
@@ -20,7 +20,7 @@ class ViewerJsAssets extends AssetBundle
     /**
      * @var string the directory that contains the source asset files for this asset bundle.
      */
-    public $sourcePath = '@vendor/bower/viewerjs/ViewerJs';
+    public $sourcePath = '@vendor/bower/viewerjs/ViewerJS';
     /**
      * @var array list of JavaScript files that this bundle contains.
      */
diff --git a/ViewerJsDocumentViewer.php b/ViewerJsDocumentViewer.php
index 74b39e8..d14f707 100644
--- a/ViewerJsDocumentViewer.php
+++ b/ViewerJsDocumentViewer.php
@@ -50,7 +50,7 @@ protected function _getIframeUrl()
     public function init()
     {
         ViewerJsAssets::register($this->view);
-        $this->_urlViewer = \Yii::$app->assetManager->getPublishedUrl('@vendor/bower/viewerjs/ViewerJs');
+        $this->_urlViewer = \Yii::$app->assetManager->getPublishedUrl('@vendor/bower/viewerjs/ViewerJS');
         parent::init();
     }