diff --git a/README.md b/README.md
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@@ -5,7 +5,7 @@
 
 ## Software prerequisities
 * Arduino Software
-* [Arduino Core for STM32](https://github.com/stm32duino/Arduino_Core_STM32)
+* [Arduino Core for STM32](https://github.com/balux33/Arduino_STM32)
 * [Adafruit PCD8544 Library](https://github.com/adafruit/Adafruit-PCD8544-Nokia-5110-LCD-library)
 * [Adafruit GFX Library](https://github.com/adafruit/Adafruit-GFX-Library)
 * [SimpleTimer Library for Arduino](https://playground.arduino.cc/Code/SimpleTimer#Download)