diff --git a/adventskalender/2025/index.html b/adventskalender/2025/index.html
index d04612b..c7a6a35 100644
--- a/adventskalender/2025/index.html
+++ b/adventskalender/2025/index.html
@@ -103,6 +103,7 @@
   <script src="../shared/js/save-progress.js"></script>
   <script src="../shared/js/position.js"></script>
   <script src="../shared/js/glitter.js"></script>
+  <script src="../shared/js/lock.js"></script>
   <script src="js/popup.js"></script>
   <script src="../shared/js/door-open.js"></script>
 </body>