diff --git a/README.rst b/README.rst
index 9f4c65f..11b95e7 100644
--- a/README.rst
+++ b/README.rst
@@ -30,6 +30,7 @@ This driver depends on:
 
 * `Adafruit CircuitPython <https://github.com/adafruit/circuitpython>`_
 * `Bus Device <https://github.com/adafruit/Adafruit_CircuitPython_BusDevice>`_
+* `Register <https://github.com/adafruit/Adafruit_CircuitPython_Register>`_
 
 Please ensure all dependencies are available on the CircuitPython filesystem.
 This is easily achieved by downloading