diff --git a/frontend/templates/search.html b/frontend/templates/search.html
index 89ad5cb7..28cb0dfc 100644
--- a/frontend/templates/search.html
+++ b/frontend/templates/search.html
@@ -298,9 +298,13 @@
   }
 
   function escapeHtml(str) {
-    const d = document.createElement('div');
-    d.textContent = str;
-    return d.innerHTML;
+    if (str === null || str === undefined) return '';
+    return String(str)
+      .replace(/&/g, '&')
+      .replace(/</g, '&lt;')
+      .replace(/>/g, '&gt;')
+      .replace(/"/g, '&quot;')
+      .replace(/'/g, '&#039;');
   }
 
   /**