diff --git a/README.md b/README.md
index 989fa2b..4b5278b 100644
--- a/README.md
+++ b/README.md
@@ -48,7 +48,7 @@ Aquacontrol32 runs on hardware based on a [MH-ET LIVE MiniKit ESP32](http://mh.n
 
 - The latest [Arduino IDE](https://arduino.cc/).
 
-- The [ESP32 Arduino Core @ commit c24a3404c638ababb7d8ded5f2c8612ec109952a](https://github.com/espressif/arduino-esp32/commit/c24a3404c638ababb7d8ded5f2c8612ec109952a).
+- The [ESP32 Arduino Core @ commit 9570b77abda4a8cac0caee354a14f5e4a35a7a04](https://github.com/espressif/arduino-esp32/commit/9570b77abda4a8cac0caee354a14f5e4a35a7a04).
 
 
 Aquacontrol32 can run happily with or without OLED or TFT display.