diff --git a/todo.txt b/todo.txt
index f73d8aa..4988a80 100755
--- a/todo.txt
+++ b/todo.txt
@@ -13,6 +13,7 @@ Mandatory:
     * Status (parameter validation remains to be implemented).
 8. Implement the ability to add safety orders to a short trader depending on the amount of free funds available, not just any number of orders.
 9. API documentation.
+10. Implement api key hashing.
 
 
 Would be nice to have: