diff --git a/requirements.txt b/requirements.txt
index c651e69..16294de 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,4 +4,4 @@
 
 Adafruit-Blinka
 Adafruit_CircuitPython_ESP32SPI
-Adafruit_CircuitPython_SimpleIO
+adafruit-circuitpython-simpleio