diff --git a/src/simpleguardhome/templates/index.html b/src/simpleguardhome/templates/index.html
index 7f36aea..0d1c463 100644
--- a/src/simpleguardhome/templates/index.html
+++ b/src/simpleguardhome/templates/index.html
@@ -8,6 +8,13 @@
     <script src="https://cdnjs.cloudflare.com/ajax/libs/dompurify/2.3.4/purify.min.js" integrity="sha384-KGmzmwrs7oAU2sG5qfETslFsscVcCaxQrX2d7PW7I9bTrsuTD/eSMFr9jaMS9i+b" crossorigin="anonymous"></script>
     <script>
         function escapeHtml(unsafe) {
+            return unsafe
+                .replace(/&/g, "&amp;")
+                .replace(/</g, "&lt;")
+                .replace(/>/g, "&gt;")
+                .replace(/"/g, "&quot;")
+                .replace(/'/g, "&#039;");
+        }
             return unsafe.replace(/[&<"']/g, function (m) {
                 switch (m) {
                     case '&': return '&amp;';