diff --git a/public/index.html b/public/index.html
index 50c205c..8c86775 100644
--- a/public/index.html
+++ b/public/index.html
@@ -11,7 +11,7 @@
 
     <!-- jQuery first, then Tether, then Bootstrap JS. -->
     <script src="https://code.jquery.com/jquery-3.4.1.js" integrity="sha256-WpOohJOqMqqyKL9FccASB9O0KwACQJpFTUBLTYOVvVU=" crossorigin="anonymous"></script>
-    <script src="https://cdnjs.cloudflare.com/ajax/libs/tether/1.4.0/js/tether.min.js" integrity="sha384-DztdAPBWPRXSA/3eYEEUWrWCy7G5KFbe8fFjk5JAIxUYHKkDx6Qin1DkWx51bBrb" crossorigin="anonymous"></script>
+    <script src="https://cdnjs.cloudflare.com/ajax/libs/tether/1.4.7/js/tether.min.js" integrity="sha512-X7kCKQJMwapt5FCOl2+ilyuHJp+6ISxFTVrx+nkrhgplZozodT9taV2GuGHxBgKKpOJZ4je77OuPooJg9FJLvw==" crossorigin="anonymous"></script>
     <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.6/js/bootstrap.min.js" integrity="sha384-vBWWzlZJ8ea9aCX4pEW3rVHjgjt7zpkNpZk+02D9phzyeVkE+jo0ieGizqPLForn" crossorigin="anonymous"></script>
 
     <!-- Google AdSense -->