diff --git a/README.md b/README.md
index 4230559..1dd71e9 100644
--- a/README.md
+++ b/README.md
@@ -162,6 +162,7 @@ Done:
 
 To (possibly) do:
 
+- [ ] Specify number of samples as a command line option
 - [ ] Document parenthesis syntax
 - [ ] Add functions. Now easier to do with an explicit representation of the stakc
 - [ ] Think about how to draw a histogram from samples