diff --git a/binder/requirements.txt b/binder/requirements.txt
index 6d17033..9623776 100644
--- a/binder/requirements.txt
+++ b/binder/requirements.txt
@@ -1,4 +1,6 @@
+# This file is used by mybinder.org to power the runnable examples.
 tiingo
 
-# You technically don't have to use tiingo with pandas
+# You technically don't have to use tiingo with pandas, but
+# we included it since most data analysts will have it installed already.
 pandas