diff --git a/README.rst b/README.rst
index 5550d6f..2c98424 100644
--- a/README.rst
+++ b/README.rst
@@ -31,6 +31,7 @@ Dependencies
 This driver depends on:
 
 * `Adafruit CircuitPython <https://github.com/adafruit/circuitpython>`_
+* `Ticks <https://github.com/adafruit/Adafruit_CircuitPython_Ticks>`_
 
 Please ensure all dependencies are available on the CircuitPython filesystem.
 This is easily achieved by downloading