diff --git a/README.md b/README.md
index 1df7e97..e6f0e12 100644
--- a/README.md
+++ b/README.md
@@ -263,6 +263,7 @@ baz
 ```
 
 ## TODO
+- Add "Debug" mode with verbose output;
 - Bug: required + variable/variable_value makes no sense as it makes option variable constant;
 - Add examples;
 - Implement "Help" generation;