diff --git a/boards/feather-nrf52840-sense/doc.txt b/boards/feather-nrf52840-sense/doc.txt
index 2e7aa52cfb..e34ee6b7f6 100644
--- a/boards/feather-nrf52840-sense/doc.txt
+++ b/boards/feather-nrf52840-sense/doc.txt
@@ -23,4 +23,25 @@ Low Energy and IEEE 802.15.4 support via the nRF52840 MCU.
 Refer to [The Feather nRF52840 Express
 documentation](https://doc.riot-os.org/group__boards__feather-nrf52840.html) for further details.
 Both use the same flasher, bootloader, and terminal settings.
+
+On "fresh" boards the
+[bootloader may need to be updated](https://learn.adafruit.com/adafruit-feather-sense/update-bootloader)
+
+#### Updating Old Bootloaders
+
+In some cases the bootloader may be too old to even mount on startup.
+Double tap the reset button to get into bootloader mode and check the
+`INFO_UF2.TXT` for bootloader information.
+If the version is less than `0.4.0` then one can use the
+[Adafruit_nRF52_Bootloader](https://github.com/adafruit/Adafruit_nRF52_Bootloader)
+tool to update.
+
+For example, one can run the following if `arm-none-eabi-gcc` and
+`adafruit-nrfutil` are installed:
+```
+git clone https://github.com/adafruit/Adafruit_nRF52_Bootloader.git
+cd Adafruit_nRF52_Bootloader
+git submodule update --init
+make BOARD=feather_nrf52840_sense SERIAL=/dev/ttyACM0 flash-dfu
+```
 */