diff --git a/experiments/democode/perleditor.html b/experiments/democode/perleditor.html
index cbf7638..e807ccb 100644
--- a/experiments/democode/perleditor.html
+++ b/experiments/democode/perleditor.html
@@ -25,10 +25,8 @@ You should have received a copy of the licenses along with this program.
 If not, see http://perldoc.perl.org/index-licence.html
 -->
 
-<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/normalize/8.0.0/normalize.min.css"
-	integrity="sha256-oSrCnRYXvHG31SBifqP2PM1uje7SJUyX0nTwO2RJV54=" crossorigin="anonymous" />
-<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/codemirror/5.39.2/codemirror.min.css"
-	integrity="sha256-I8NyGs4wjbMuBSUE40o55W6k6P7tu/7G28/JGUUYCIs=" crossorigin="anonymous" />
+<!--cacheable--><link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/normalize/8.0.0/normalize.min.css" integrity="sha256-oSrCnRYXvHG31SBifqP2PM1uje7SJUyX0nTwO2RJV54=" crossorigin="anonymous" />
+<!--cacheable--><link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/codemirror/5.39.2/codemirror.min.css" integrity="sha256-I8NyGs4wjbMuBSUE40o55W6k6P7tu/7G28/JGUUYCIs=" crossorigin="anonymous" />
 <style>
 body {
 	margin: 0.4em;
@@ -51,12 +49,9 @@ pre {
 }
 </style>
 
-<script src="https://cdnjs.cloudflare.com/ajax/libs/codemirror/5.39.2/codemirror.min.js"
-	integrity="sha256-uRIJ6Wfou5cTtmcCvQNA9lvsYl8sUbZXxnfG+P79ssY=" crossorigin="anonymous"></script>
-<script src="https://cdnjs.cloudflare.com/ajax/libs/codemirror/5.39.2/mode/perl/perl.min.js"
-	integrity="sha256-Uu9QBfi8gU6J/MzQunal8ewmY+i/BbCkBrcAXA5bcCM=" crossorigin="anonymous"></script>
-<script src="https://code.jquery.com/jquery-3.3.1.min.js"
-	integrity="sha256-FgpCb/KJQlLNfOu91ta32o/NMZxltwRo8QtmkMRdAu8=" crossorigin="anonymous"></script>
+<!--cacheable--><script src="https://cdnjs.cloudflare.com/ajax/libs/codemirror/5.39.2/codemirror.min.js" integrity="sha256-uRIJ6Wfou5cTtmcCvQNA9lvsYl8sUbZXxnfG+P79ssY=" crossorigin="anonymous"></script>
+<!--cacheable--><script src="https://cdnjs.cloudflare.com/ajax/libs/codemirror/5.39.2/mode/perl/perl.min.js" integrity="sha256-Uu9QBfi8gU6J/MzQunal8ewmY+i/BbCkBrcAXA5bcCM=" crossorigin="anonymous"></script>
+<!--cacheable--><script src="https://code.jquery.com/jquery-3.3.1.min.js" integrity="sha256-FgpCb/KJQlLNfOu91ta32o/NMZxltwRo8QtmkMRdAu8=" crossorigin="anonymous"></script>
 <script>
 "use strict";
 
diff --git a/experiments/xterm.html b/experiments/xterm.html
index 5a9b516..7ede03a 100644
--- a/experiments/xterm.html
+++ b/experiments/xterm.html
@@ -4,10 +4,8 @@
 <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
 <title>WebPerl XTerm.js Test</title>
 
-<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/xterm@3.7.0/dist/xterm.css"
-	integrity="sha256-OSfRj4jMeYVFSwgcvVvKj4V0+mwqSP9YJjyEJe7dmK0=" crossorigin="anonymous" />
-<script src="https://cdn.jsdelivr.net/npm/xterm@3.7.0/dist/xterm.js"
-	integrity="sha256-gIILiZzLBFrmY1dzcKJC2Nmw4o9ISITTNsro2rf8svM=" crossorigin="anonymous"></script>
+<!--cacheable--><link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/xterm@3.7.0/dist/xterm.css" integrity="sha256-OSfRj4jMeYVFSwgcvVvKj4V0+mwqSP9YJjyEJe7dmK0=" crossorigin="anonymous" />
+<!--cacheable--><script src="https://cdn.jsdelivr.net/npm/xterm@3.7.0/dist/xterm.js" integrity="sha256-gIILiZzLBFrmY1dzcKJC2Nmw4o9ISITTNsro2rf8svM=" crossorigin="anonymous"></script>
 
 <script src="webperl.js"></script>
 
diff --git a/web/webperl_demo.html b/web/webperl_demo.html
index c7205e8..51adb6b 100644
--- a/web/webperl_demo.html
+++ b/web/webperl_demo.html
@@ -27,7 +27,7 @@ js('document')->getElementById('my_button')
 </script>
 
 <!-- Example 3: Using jQuery -->
-<script src="https://code.jquery.com/jquery-3.3.1.min.js" integrity="sha256-FgpCb/KJQlLNfOu91ta32o/NMZxltwRo8QtmkMRdAu8=" crossorigin="anonymous"></script>
+<!--cacheable--><script src="https://code.jquery.com/jquery-3.3.1.min.js" integrity="sha256-FgpCb/KJQlLNfOu91ta32o/NMZxltwRo8QtmkMRdAu8=" crossorigin="anonymous"></script>
 <script type="text/perl">
 use warnings;
 use strict;