diff --git a/src/OfficeConverter/OfficeConverter.php b/src/OfficeConverter/OfficeConverter.php
index e145cec..5a00dc2 100644
--- a/src/OfficeConverter/OfficeConverter.php
+++ b/src/OfficeConverter/OfficeConverter.php
@@ -149,14 +149,14 @@ private function getAllowedConverter($extension = null)
             'pdf' => ['pdf'],
             'docx' => ['pdf', 'odt', 'html'],
             'doc' => ['pdf', 'odt', 'html'],
+            'dotx' => ['pdf', 'odt', 'html'],
+            'dot' => ['pdf', 'odt', 'html'],
+            'odt' => ['pdf', 'html'],
             'xlsx' => ['pdf'],
             'xls' => ['pdf'],
             'png' => ['pdf'],
-            'PNG' => ['pdf'],
             'jpg' => ['pdf'],
-            'JPG' => ['pdf'],
             'jpeg' => ['pdf'],
-            'JPEG' => ['pdf'],
         ];
 
         if ($extension !== null) {