diff --git a/PicoVision-dev-setup/4MicroPython.sh b/PicoVision-dev-setup/4MicroPython.sh
index 08b8310..8e007c3 100755
--- a/PicoVision-dev-setup/4MicroPython.sh
+++ b/PicoVision-dev-setup/4MicroPython.sh
@@ -11,6 +11,7 @@ curl -sOL \
   "https://github.com/pimoroni/picovision/releases/download/v$PICOVISION_VERSION/pimoroni-picovision-widescreen-v$PICOVISION_VERSION-micropython.uf2"
 
 echo "Downloading flash_nuke.uf2"
+# https://www.raspberrypi.com/documentation/microcontrollers/raspberry-pi-pico.html#resetting-flash-memory
 curl -sOL https://datasheets.raspberrypi.com/soft/flash_nuke.uf2
 
 echo "Finished!"