diff --git a/_includes/head.html b/_includes/head.html
index aa897c6c7..439f0aafc 100644
--- a/_includes/head.html
+++ b/_includes/head.html
@@ -45,10 +45,6 @@
   <link rel="dns-prefetch" href="cdn.jsdelivr.net">
 
   <!-- Bootstrap -->
-  <link rel="preload" as="style"
-    href="https://cdn.jsdelivr.net/npm/bootstrap@4.0.0/dist/css/bootstrap.min.css"
-    integrity="sha256-LA89z+k9fjgMKQ/kq4OO2Mrf8VltYml/VES+Rg0fh20=" crossorigin>
-
   <link rel="stylesheet"
     href="https://cdn.jsdelivr.net/npm/bootstrap@4.0.0/dist/css/bootstrap.min.css"
     integrity="sha256-LA89z+k9fjgMKQ/kq4OO2Mrf8VltYml/VES+Rg0fh20=" crossorigin="anonymous">
@@ -63,13 +59,10 @@
 
   <!-- JavaScripts -->
 
-  <link rel="preload" as="script" href="https://cdn.jsdelivr.net/npm/jquery@3.4.1"
-    integrity="sha256-CSXorXvZcTkaix6Yvo6HppcZGetbYMGWSFlBw8HfCJo=" crossorigin="anonymous">
+  <script src="https://cdn.jsdelivr.net/npm/jquery@3/dist/jquery.min.js"></script>
 
-  <script src="https://cdn.jsdelivr.net/npm/jquery@3.4.1"
-    integrity="sha256-CSXorXvZcTkaix6Yvo6HppcZGetbYMGWSFlBw8HfCJo=" crossorigin="anonymous"></script>
-
-  <script src="https://cdn.jsdelivr.net/combine/npm/popper.js@1.15.0,npm/bootstrap@4.0.0/dist/js/bootstrap.min.js" async></script>
+  <script async
+    src="https://cdn.jsdelivr.net/combine/npm/popper.js@1.15.0,npm/bootstrap@4/dist/js/bootstrap.min.js"></script>
 
   {% include js-selector.html %}