diff --git a/todo b/todo
index afada53..603f8be 100644
--- a/todo
+++ b/todo
@@ -1,4 +1,4 @@
 make bash-git-prompt dependent on bash (merge?)
 use decorators for repeated function modifiers
 remove sensitive information in source
-remove sensitive information in history
+remove sensitive information in history : https://docs.github.com/en/github/authenticating-to-github/removing-sensitive-data-from-a-repository