diff --git a/kakom-ti/index.php b/kakom-ti/index.php
index 4bdf0b3..15a2304 100644
--- a/kakom-ti/index.php
+++ b/kakom-ti/index.php
@@ -56,7 +56,7 @@ include "../includes/courses.php";
     <li><a href="introduction_cryptography.pdf">Introduction to Cryptography</a></li>
     <li><a href="number_theory.pdf">Number Theory</a> - <a href="number-theory.zip.zip">Script</a></li>
     <li><a href="classical_ciphers.pdf">Classical Ciphers</a></li>
-    <li>Symmetric Cryptography #1</li>
+    <li><a href="symmetric_cryptography-1.pdf">Symmetric Cryptography #1</a></li>
     <li>Symmetric Cryptography #2</li>        
     <li>Asymmetric Cryptography #1</li>
     <li>Asymmetric Cryptography #2</li>