diff --git a/README.md b/README.md
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@@ -265,8 +265,8 @@ baz
 ```
 
 ## TODO
+- Add function to set config variables and validates them;
 - 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;
 - Add tests.