diff --git a/requirements.txt b/requirements.txt
index b978884..9006939 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,3 +3,4 @@ adafruit-circuitpython-busdevice
 neopixel
 adafruit_seesaw
 adafruit_matrixkeypad
+adafruit_neotrellis