diff --git a/etc/sudoers.d/security-misc b/etc/sudoers.d/security-misc
index 803ee25..cc700a9 100644
--- a/etc/sudoers.d/security-misc
+++ b/etc/sudoers.d/security-misc
@@ -7,5 +7,6 @@
 
 ## Use a more open umask when executing commands with sudo
 ## Can be overridden on a per-user basis using .[z]profile if desirable
+## https://www.kicksecure.com/wiki/Dev/Strong_Linux_User_Account_Isolation#umask_hardening
 Defaults umask_override
 Defaults umask=0022