diff --git a/_includes/head.html b/_includes/head.html
index a363237..6437a03 100644
--- a/_includes/head.html
+++ b/_includes/head.html
@@ -16,7 +16,7 @@
 <!-- most color styles are extracted out to here -->
 <link rel="stylesheet" href="css/theme-blue.css">
 
-<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/2.1.4/jquery.min.js"></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
 
 <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery-cookie/1.4.1/jquery.cookie.min.js"></script>
 <script src="{{ "js/jquery.navgoco.min.js" }}"></script>
@@ -25,7 +25,7 @@
 <!-- Latest compiled and minified JavaScript -->
 <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js" integrity="sha384-Tc5IQib027qvyjSMfHjOMaLkfuWVxZxUPnCJA7l2mCWNIpG9mGCD8wGNIcPD7Txa" crossorigin="anonymous"></script>
 <!-- Anchor.js -->
-<script src="https://cdnjs.cloudflare.com/ajax/libs/anchor-js/2.0.0/anchor.min.js"></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/anchor-js/4.2.0/anchor.min.js"></script>
 <script src="{{ "js/toc.js" }}"></script>
 <script src="{{ "js/customscripts.js" }}"></script>