diff --git a/README.md b/README.md
index 3f50e58..482d17e 100644
--- a/README.md
+++ b/README.md
@@ -79,4 +79,5 @@ echo $?
 ## Links:
 
  - [https://cr.yp.to/checkpwd.html](https://cr.yp.to/checkpwd.html)
+ - [https://pamtester.sourceforge.net/](https://pamtester.sourceforge.net/)