diff --git a/CHANGELOG.md b/CHANGELOG.md
index c3c43d7..03bd64f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+## unreleased
+
+- support Telegram API 6.9
+
 ## 0.6.1
 
 - Fixed Dart doc generation errors
diff --git a/README.md b/README.md
index 3a09d55..0adf010 100644
--- a/README.md
+++ b/README.md
@@ -4,7 +4,7 @@ A clean implementation of [Telegram bot API](https://core.telegram.org/bots/api)
 
 ![TeleDart](https://raw.githubusercontent.com/DinoLeung/TeleDart/master/example/dash_paper_plane.svg?sanitize=true)
 
-[![Bot API Version](https://img.shields.io/badge/Bot%20API-6.8-blue.svg?style=flat-square)](https://core.telegram.org/bots/api)
+[![Bot API Version](https://img.shields.io/badge/Bot%20API-6.9-blue.svg?style=flat-square)](https://core.telegram.org/bots/api)
 [![Dart Version](https://img.shields.io/badge/Dart-3.1-blue.svg?style=flat-square)](https://dart.dev)
 [![License: GPL v3](https://img.shields.io/badge/License-GPL%20v3-blue.svg?style=flat-square)](https://www.gnu.org/licenses/gpl-3.0)