diff --git a/ness.py b/ness.py
index 5f3ed1b..70d0c6e 100644
--- a/ness.py
+++ b/ness.py
@@ -1,3 +1,4 @@
+# https://gist.github.com/dperconti/0c3ce81c1bea6593e0989ab58ee411f4
 import datetime
 from pprint import pprint
 from statistics import mean