diff --git a/kakom-ti/index.php b/kakom-ti/index.php
index bb3cd15..b8aa4b7 100644
--- a/kakom-ti/index.php
+++ b/kakom-ti/index.php
@@ -64,7 +64,7 @@ include "../includes/courses.php";
     <li><a href="public_key_cryptography-1.pdf">Asymmetric Cryptography #1</a></li>
     <li><a href="public_key_cryptography-2.pdf">Asymmetric Cryptography #2</a></li>
     <li><a href="hash.pdf">Hash Functions and Message Authentication Codes</a></li>
-    <li>Access Control (Authentication)</li>
+    <li><a href="authentication.pdf">Access Control (Authentication)</a></li>
     <li>Access Control (Authorization)</li>
     <li>Software Flaws and Malware</li>
   </ol>