diff --git a/docs/notes/hardware/SSD1306.md b/docs/notes/hardware/SSD1306.md
index 205b38a..588d5a8 100644
--- a/docs/notes/hardware/SSD1306.md
+++ b/docs/notes/hardware/SSD1306.md
@@ -62,6 +62,7 @@ pip3 install Adafruit_BBIO
 git clone https://github.com/adafruit/Adafruit_Python_SSD1306.git
 cd Adafruit_Python_SSD1306
 sudo python setup.py install
+pip install RPi.GPIO
 
 cd Adafruit_Python_SSD1306/examples/
 cp Adafruit_Python_SSD1306/examples/stats.py /opt/