diff --git a/todo.txt b/todo.txt
index 466277b..a085f11 100644
--- a/todo.txt
+++ b/todo.txt
@@ -3,3 +3,7 @@
 * Make depth configurable per directory.
 
 Set a default depth in config.yaml.
+Add unit tests.
+Add a `--dry-run` option.
+Complete README.
+Add Nix package.