diff --git a/README.md b/README.md
index 0915325..5f8e1e3 100644
--- a/README.md
+++ b/README.md
@@ -308,6 +308,11 @@ Overall, I'd describe the error handling capabilities of this library as pretty
 
 ## To do list
 
+- [ ] Write better confidence interval code that:
+  - Gets number of samples as an input
+  - Gets either a sampler function or a list of samples
+  - is O(n), not O(nlog(n))
+  - Parallelizes stuff
 - [ ] Document paralellism
 - [ ] Document confidence intervals
 - [ ] Point out that, even though the C standard is ambiguous about this, this code assumes that doubles are 64 bit precision (otherwise the xorshift should be different).