diff --git a/src/DocumentTypeProvider.php b/src/DocumentTypeProvider.php
index 84fbf95..d17439d 100644
--- a/src/DocumentTypeProvider.php
+++ b/src/DocumentTypeProvider.php
@@ -25,6 +25,8 @@ abstract class DocumentTypeProvider
 
     const EDOC = 'edoc';
 
+    const XADES = 'xades';
+
     final public static function getAllDocumentTypes()
     {
         return [
@@ -43,6 +45,7 @@ final public static function getAllDocumentTypes()
             self::MDOC_GGEDOC,
             self::BDOC,
             self::EDOC,
+            self::XADES,
         ];
     }