diff --git a/winixd/html/index_head_adder.html b/winixd/html/index_head_adder.html
index b4c3bbe..7485c11 100644
--- a/winixd/html/index_head_adder.html
+++ b/winixd/html/index_head_adder.html
@@ -7,11 +7,11 @@
 <meta name="viewport" content="width=device-width, initial-scale=1">
 
 [# UIkit CSS]
-<link rel="stylesheet" href="[doc_base_url_common]/uikit/uikit-3.6.18/css/uikit.min.css">
+<link rel="stylesheet" href="[doc_base_url_common]/uikit/uikit-3.6.21/css/uikit.min.css">
 
 [# UIkit JS]
-<script src="[doc_base_url_common]/uikit/uikit-3.6.18/js/uikit.min.js"></script>
-<script src="[doc_base_url_common]/uikit/uikit-3.6.18/js/uikit-icons.min.js"></script>
+<script src="[doc_base_url_common]/uikit/uikit-3.6.21/js/uikit.min.js"></script>
+<script src="[doc_base_url_common]/uikit/uikit-3.6.21/js/uikit-icons.min.js"></script>