diff --git a/src/Module.php b/src/Module.php
index 9820a3a..b40c264 100644
--- a/src/Module.php
+++ b/src/Module.php
@@ -71,7 +71,7 @@ class Module extends BaseModule
     /**
      * @var string default allowed files extension
      */
-    public $allowExtension = 'jpeg jpg png gif svg mov mp3 mp4 avi wmv flv mpeg webm ogg';
+    public $allowExtension = 'jpeg jpg png gif svg mov mp3 mp4 avi wmv flv mpeg webm ogg webp';
     
     /**
      * @var bool check mime type of uploaded files
@@ -82,6 +82,11 @@ class Module extends BaseModule
      * @var string which schema should use form copy URL
      */
     public string $urlSchema = 'https';
+
+    /**
+     * @var bool Set true for convert file names to unicode string
+     */
+    public bool $normalizeFileName = true;
     
     /**
      * Initializes the module.
diff --git a/src/helpers/FileHelper.php b/src/helpers/FileHelper.php
index 5fdce63..f9175c5 100644
--- a/src/helpers/FileHelper.php
+++ b/src/helpers/FileHelper.php
@@ -205,15 +205,18 @@ public static function isImage($fileName)
      *
      * @return mixed|string
      */
-    public static function removeSign($convert, $char = "_")
+    public static function removeSign($convert, $char = "_") : string
     {
-        $vietnameseChar  = "à|á|ạ|ả|ã|â|ầ|ấ|ậ|ẩ|ẫ|ă|ằ|ắ|ặ|ẳ|ẵ|è|é|ẹ|ẻ|ẽ|ê|ề|ế|ệ|ể|ễ|ì|í|ị|ỉ|ĩ|ò|ó|ọ|ỏ|õ|ô|ồ|ố|ộ|ổ|ỗ|ơ|ờ|ớ|ợ|ở|ỡ|ù|ú|ụ|ủ|ũ|ư|ừ|ứ|ự|ử|ữ|ỳ|ý|ỵ|ỷ|ỹ|đ|À|Á|Ạ|Ả|Ã|Â|Ầ|Ấ|Ậ|Ẩ|Ẫ|Ă|Ằ|Ắ|Ặ|Ẳ|Ẵ|È|É|Ẹ|Ẻ|Ẽ|Ê|Ề|Ế|Ệ|Ể|Ễ|Ì|Í|Ị|Ỉ|Ĩ|Ò|Ó|Ọ|Ỏ|Õ|Ô|Ồ|Ố|Ộ|Ổ|Ỗ|Ơ|Ờ|Ớ|Ợ|Ở|Ỡ|Ù|Ú|Ụ|Ủ|Ũ|Ư|Ừ|Ứ|Ự|Ử|Ữ|Ỳ|Ý|Ỵ|Ỷ|Ỹ|Đ";
-        $unicodeChar     = "a|a|a|a|a|a|a|a|a|a|a|a|a|a|a|a|a|e|e|e|e|e|e|e|e|e|e|e|i|i|i|i|i|o|o|o|o|o|o|o|o|o|o|o|o|o|o|o|o|o|u|u|u|u|u|u|u|u|u|u|u|y|y|y|y|y|d|A|A|A|A|A|A|A|A|A|A|A|A|A|A|A|A|A|E|E|E|E|E|E|E|E|E|E|E|I|I|I|I|I|O|O|O|O|O|O|O|O|O|O|O|O|O|O|O|O|O|U|U|U|U|U|U|U|U|U|U|U|Y|Y|Y|Y|Y|D";
-        $vietnameseChars = explode("|", $vietnameseChar);
-        $unicodeChars    = explode("|", $unicodeChar);
-        $str             = strtolower(str_replace($vietnameseChars, $unicodeChars, $convert));
-        $str             = preg_replace("/[^a-zA-Z0-9\/_|+ -]/", '', $str);
-        $str             = preg_replace("/[\/_|+ -]+/", $char, $str);
-        return $str;
+        $result = $convert;
+        if (Yii::$app->controller->module->normalizeFileName) {
+            $vietnameseChar  = "à|á|ạ|ả|ã|â|ầ|ấ|ậ|ẩ|ẫ|ă|ằ|ắ|ặ|ẳ|ẵ|è|é|ẹ|ẻ|ẽ|ê|ề|ế|ệ|ể|ễ|ì|í|ị|ỉ|ĩ|ò|ó|ọ|ỏ|õ|ô|ồ|ố|ộ|ổ|ỗ|ơ|ờ|ớ|ợ|ở|ỡ|ù|ú|ụ|ủ|ũ|ư|ừ|ứ|ự|ử|ữ|ỳ|ý|ỵ|ỷ|ỹ|đ|À|Á|Ạ|Ả|Ã|Â|Ầ|Ấ|Ậ|Ẩ|Ẫ|Ă|Ằ|Ắ|Ặ|Ẳ|Ẵ|È|É|Ẹ|Ẻ|Ẽ|Ê|Ề|Ế|Ệ|Ể|Ễ|Ì|Í|Ị|Ỉ|Ĩ|Ò|Ó|Ọ|Ỏ|Õ|Ô|Ồ|Ố|Ộ|Ổ|Ỗ|Ơ|Ờ|Ớ|Ợ|Ở|Ỡ|Ù|Ú|Ụ|Ủ|Ũ|Ư|Ừ|Ứ|Ự|Ử|Ữ|Ỳ|Ý|Ỵ|Ỷ|Ỹ|Đ";
+            $unicodeChar     = "a|a|a|a|a|a|a|a|a|a|a|a|a|a|a|a|a|e|e|e|e|e|e|e|e|e|e|e|i|i|i|i|i|o|o|o|o|o|o|o|o|o|o|o|o|o|o|o|o|o|u|u|u|u|u|u|u|u|u|u|u|y|y|y|y|y|d|A|A|A|A|A|A|A|A|A|A|A|A|A|A|A|A|A|E|E|E|E|E|E|E|E|E|E|E|I|I|I|I|I|O|O|O|O|O|O|O|O|O|O|O|O|O|O|O|O|O|U|U|U|U|U|U|U|U|U|U|U|Y|Y|Y|Y|Y|D";
+            $vietnameseChars = explode("|", $vietnameseChar);
+            $unicodeChars    = explode("|", $unicodeChar);
+            $str             = strtolower(str_replace($vietnameseChars, $unicodeChars, $convert));
+            $str             = preg_replace("/[^a-zA-Z0-9\/_|+ -]/", '', $str);
+            $result             = preg_replace("/[\/_|+ -]+/", $char, $str);
+        }
+        return $result;
     }
 }