diff --git a/device/templates/details.html b/device/templates/details.html
index 8477948..331c857 100644
--- a/device/templates/details.html
+++ b/device/templates/details.html
@@ -84,7 +84,7 @@
           <div class="col-lg-3 col-md-4 label">
             {% trans 'Serial Number' %}
           </div>
-          <div class="col-lg-9 col-md-8">{{ object.last_evidence.doc.device.serialNumber|default:'' }}</div>
+          <div class="col-lg-9 col-md-8">{{ object.serial_number|default:'' }}</div>
         </div>
       {% endif %}