diff --git a/server/Application/Api/Model/AttachmentModel.class.php b/server/Application/Api/Model/AttachmentModel.class.php
index 7f69b3cba..3ce94ceaf 100644
--- a/server/Application/Api/Model/AttachmentModel.class.php
+++ b/server/Application/Api/Model/AttachmentModel.class.php
@@ -329,7 +329,7 @@ public function isAllowedFilename($filename){
 			'.zip','.tar','.gz','.tgz','.ipa','.apk','.rar','.iso','.bz2','.epub',
 			'.pdf','.ofd','.swf','.epub','.xps',
 			'.doc','.docx','.odt','.rtf','.docm','.dotm','.dot','.dotx','.wps','.wpt',
-			'.ppt','.pptx','.xls','.xlsx','.txt','.md','.psd','.csv',
+			'.ppt','.pptx','.xls','.xlsx','.txt','.psd','.csv',
 			'.cer','.ppt','.pub','.properties','.json','.css',
 			) ;