diff --git a/doc/todo.md b/doc/todo.md
index 567156a..214edd2 100644
--- a/doc/todo.md
+++ b/doc/todo.md
@@ -17,6 +17,7 @@ There's no specific order in that list. All that is subject to appear in version
 Here is ideas for version 2 of ```init.sh```:
 
  * Support for system dependant modules
+ * Idempotency (if possible)
  * Better configuration file design with a proper parser (ini style maybe)
  * Configuration designer (CCmake style maybe), can't be done in Bash