diff --git a/TODO.md b/TODO.md
index 0650dfa..e12bbd0 100644
--- a/TODO.md
+++ b/TODO.md
@@ -2,6 +2,7 @@
 - [ ] rewrite "open file" function
 - [ ] fix typos
 - [ ] change app extension to **.cnp**
+- [ ] auto-lock on minimize
 
 ## v1.0.0
 - [ ] add documentation