diff --git a/demos/classes.html b/demos/classes.html
index 55ad62e..fa86b03 100644
--- a/demos/classes.html
+++ b/demos/classes.html
@@ -1934,11 +1934,11 @@
     <!--main-->  
     
     <!-- jQuery (required for slides to work) -->
-    <script src="http://code.jquery.com/jquery-3.1.1.min.js"></script>
+    <script src="https://code.jquery.com/jquery-3.1.1.min.js"></script>
     <script src="../static/js/webslides.js"></script>
 
     <!-- OPTIONAL - svg-icons.js (fontastic.me - Font Awesome as svg icons) -->
     <script defer src="../static/js/svg-icons.js"></script>
     
   </body>
-</html>
\ No newline at end of file
+</html>