diff --git a/requirements.txt b/requirements.txt
index 2ec849d..d73e889 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,4 @@
+Adafruit-Blinka
 adafruit-circuitpython-bus-device
 adafruit-circuitpython-register
 adafruit-circuitpython-pca9685