diff --git a/README.md b/README.md
index f38b3d8..5ebdef7 100644
--- a/README.md
+++ b/README.md
@@ -2,8 +2,8 @@
 
 ## Tested on
 
-1. ESP8266 RTOS_SDK v3.4
-2. ESP32 ESP-IDF v5.4
+1. [ESP8266 RTOS_SDK v3.4](https://docs.espressif.com/projects/esp8266-rtos-sdk/en/latest/index.html#)
+2. [ESP32 ESP-IDF v5.4](https://docs.espressif.com/projects/esp-idf/en/release-v5.4/esp32/index.html)
 
 ## Note