diff --git a/README.md b/README.md
index f1fff67..f752a81 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 # AsyncTCP_RP2040W 
 
-[![arduino-library-badge](http://www.ardu-badge.com/badge/AsyncTCP_RP2040W.svg?)](http://www.ardu-badge.com/AsyncTCP_RP2040W)
+[![arduino-library-badge](https://www.ardu-badge.com/badge/AsyncTCP_RP2040W.svg?)](https://www.ardu-badge.com/AsyncTCP_RP2040W)
 [![GitHub release](https://img.shields.io/github/release/khoih-prog/AsyncTCP_RP2040W.svg)](https://github.com/khoih-prog/AsyncTCP_RP2040W/releases)
 [![contributions welcome](https://img.shields.io/badge/contributions-welcome-brightgreen.svg?style=flat)](#Contributing)
 [![GitHub issues](https://img.shields.io/github/issues/khoih-prog/AsyncTCP_RP2040W.svg)](http://github.com/khoih-prog/AsyncTCP_RP2040W/issues)