diff --git a/doc/index.md b/doc/index.md
index e93a8f3..48b14b2 100644
--- a/doc/index.md
+++ b/doc/index.md
@@ -33,12 +33,15 @@ This plugin allows you to upload and download files.
 - Firefox OS**
 - iOS
 - Windows Phone 7 and 8*
-- Windows 8*
+- Windows 8***
+- Windows***
 
 \* _Do not support `onprogress` nor `abort()`_
 
 \** _Do not support `onprogress`_
 
+\*** Partial support of `onprogress` for upload method. `onprogress` is called with empty progress event due to Windows limitations_
+
 # FileTransfer
 
 The `FileTransfer` object provides a way to upload files using an HTTP