diff --git a/public/admin/newsletter-management.html b/public/admin/newsletter-management.html
index ba341b6c..c52d27af 100644
--- a/public/admin/newsletter-management.html
+++ b/public/admin/newsletter-management.html
@@ -110,7 +110,7 @@
 
   </div>
 
-  <script src="/js/admin/newsletter-management.js?v=0.1.1.newsletter-delete-fix"></script>
+  <script src="/js/admin/newsletter-management.js?v=0.1.2.objectid-to-string"></script>
 
 </body>
 </html>
diff --git a/public/js/admin/newsletter-management.js b/public/js/admin/newsletter-management.js
index 456376c5..369f3fa7 100644
--- a/public/js/admin/newsletter-management.js
+++ b/public/js/admin/newsletter-management.js
@@ -147,8 +147,8 @@ function renderSubscribers(subscriptions) {
         ${formatDate(sub.subscribed_at)}
       </td>
       <td class="px-6 py-4 whitespace-nowrap text-right text-sm font-medium">
-        <button class="view-details-btn text-blue-600 hover:text-blue-900 mr-3" data-id="${sub._id}">View</button>
-        <button class="delete-subscriber-btn text-red-600 hover:text-red-900" data-id="${sub._id}" data-email="${escapeHtml(sub.email)}">Delete</button>
+        <button class="view-details-btn text-blue-600 hover:text-blue-900 mr-3" data-id="${String(sub._id)}">View</button>
+        <button class="delete-subscriber-btn text-red-600 hover:text-red-900" data-id="${String(sub._id)}" data-email="${escapeHtml(sub.email)}">Delete</button>
       </td>
     </tr>
   `).join('');