diff --git a/README.md b/README.md
index 484d8f9..21a834e 100644
--- a/README.md
+++ b/README.md
@@ -31,6 +31,7 @@ This version of _py-kms_ is for itself a fork of the original implementation by
 	- Microsoft Office 2013 ( Volume License )
 	- Microsoft Office 2016 ( Volume License )
 	- Microsoft Office 2019 ( Volume License )
+	- Microsoft Office 2021 ( Volume License )
   - It's written in Python (tested with Python 3.6.9).
   - Supports execution by `Docker`, `systemd`, `Upstart` and many more...
   - Includes a GUI for simple managing.