diff --git a/README.md b/README.md
index cf3918d..16b524f 100644
--- a/README.md
+++ b/README.md
@@ -5,6 +5,7 @@ The software that is running on the SumoRobots
 * Change the SERIAL_PORT in the Makefile
 * Add your WiFi networks to the config.json file
 * Install [Python](https://www.python.org/downloads/)
+* Install [esptool](https://github.com/espressif/esptool) (to communicate with the ESP32 board)
 * Install [ampy](https://github.com/adafruit/ampy) (for uploading files)
 * Download [the MicroPython binary](http://micropython.org/download#esp32) to this directory
 * Upload the MicroPython binary and the SumoRobot firmware to your ESP32 (open a terminal and type: make all)