diff --git a/application/config/config-defaults.php b/application/config/config-defaults.php
index a45af7a0481..19c377c300d 100644
--- a/application/config/config-defaults.php
+++ b/application/config/config-defaults.php
@@ -86,7 +86,7 @@
 
 $config['allowedtemplateuploads'] = 'gif,ico,jpg,png,css,js';  // File types allowed to be uploaded in the templates section.
 
-$config['allowedresourcesuploads'] = '7z,aiff,asf,avi,bmp,csv,doc,fla,flv,gif,gz,gzip,ico,jpeg,jpg,mid,mov,mp3,mp4,mpc,mpeg,mpg,ods,odt,pdf,png,ppt,pxd,qt,ram,rar,rm,rmi,rmvb,rtf,sdc,sitd,swf,sxc,sxw,tar,tgz,tif,tiff,txt,vsd,wav,wma,wmv,xls,xml,zip,pstpl,css,js';   // File types allowed to be uploaded in the resources sections, and with the HTML Editor
+$config['allowedresourcesuploads'] = '7z,aiff,asf,avi,bmp,csv,doc,docx,fla,flv,gif,gz,gzip,ico,jpeg,jpg,mid,mov,mp3,mp4,mpc,mpeg,mpg,ods,odt,pdf,png,ppt,pxd,qt,ram,rar,rm,rmi,rmvb,rtf,sdc,sitd,swf,sxc,sxw,tar,tgz,tif,tiff,txt,vsd,wav,wma,wmv,xls,xlsx,xml,zip,pstpl,css,js';   // File types allowed to be uploaded in the resources sections, and with the HTML Editor
 
 $config['memory_limit']        =  '32';   // This sets how much memory LimeSurvey can access in megabytes. 32 mb is the minimum recommended - if you are using PDF functions up to 64 mb may be needed