diff --git a/README.md b/README.md
index 9bbc047..5e478a7 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,4 @@
 # PiLEDlights
-Make LEDs blink on network or harddisk activity
+Make LEDs blink on network or harddisk activity.
+
+netledPi and hddledPi make use of Gordon Henderson's wiringPi library - wiringpi.com