diff --git a/backoffice/app/static/index.html b/backoffice/app/static/index.html
index e629ade..6ae3c84 100644
--- a/backoffice/app/static/index.html
+++ b/backoffice/app/static/index.html
@@ -98,7 +98,10 @@
   </div>
 
   <script>
-    const API = 'api';
+    // Derive the API base from this page's own path so it works whether the
+    // dashboard is opened at /crm or /crm/ (relative fetches break without the
+    // trailing slash).
+    const API = location.pathname.replace(/\/+$/, '') + '/api';
     const TOKEN = '__CRM_TOKEN__';
     const COLS = {
       leads: ['lead_id','received_at','client_id','source','name','contact','service_interest','message','status','notified'],