diff --git a/README.md b/README.md
index 878274f4..efcc7ce4 100644
--- a/README.md
+++ b/README.md
@@ -47,7 +47,7 @@ This software is distributed under the [LGPL 2.1](http://www.gnu.org/licenses/lg
 PHPMailer is available on [Packagist](https://packagist.org/packages/phpmailer/phpmailer) (using semantic versioning), and installation via [Composer](https://getcomposer.org) is the recommended way to install PHPMailer. Just add this line to your `composer.json` file:
 
 ```json
-"phpmailer/phpmailer": "^6.8.1"
+"phpmailer/phpmailer": "^6.9.0"
 ```
 
 or run
@@ -58,7 +58,8 @@ composer require phpmailer/phpmailer
 
 Note that the `vendor` folder and the `vendor/autoload.php` script are generated by Composer; they are not part of PHPMailer.
 
-If you want to use the Gmail XOAUTH2 authentication class, you will also need to add a dependency on the `league/oauth2-client` package in your `composer.json`.
+If you want to use XOAUTH2 authentication, you will also need to add a dependency on the `league/oauth2-client` and appropriate service adapters package in your `composer.json`, or take a look at
+by @decomplexity's [SendOauth2 wrapper](https://github.com/decomplexity/SendOauth2), especially if you're using Microsoft services.
 
 Alternatively, if you're not using Composer, you
 can [download PHPMailer as a zip file](https://github.com/PHPMailer/PHPMailer/archive/master.zip), (note that docs and examples are not included in the zip file), then copy the contents of the PHPMailer folder into one of the `include_path` directories specified in your PHP configuration and load each class file manually: