diff --git a/todo.txt b/todo.txt
index d42b2b7..f559dc9 100644
--- a/todo.txt
+++ b/todo.txt
@@ -1,4 +1,4 @@
 1. Error-checking - invalid regex, Out-of-bounds stuff. Do more testing.
-2. More opreators - +, ?, character classes
-3. '*' doesn't match trailing whitespace
+2. More operators - ?, character classes
+3. Add support for zero-length matches - see https://regex101.com/r/8Ec4ue/1
 4. Fix adding concatenation operators in shunting-yard function (very janky, compares against operators individually)