diff --git a/deploy/nginx.conf.template b/deploy/nginx.conf.template
index c84e6e4..a56bc33 100644
--- a/deploy/nginx.conf.template
+++ b/deploy/nginx.conf.template
@@ -32,5 +32,10 @@ server {
         proxy_read_timeout 30s;
         client_max_body_size 2m;
     }
-    location / { try_files $uri $uri/ =404; }
+    # Always revalidate HTML/JS/CSS after a deployment. Without this, a browser
+    # can pair a new Kanban page with a cached older script after a rollout.
+    location / {
+        expires -1;
+        try_files $uri $uri/ =404;
+    }
 }
diff --git a/local/static/kanban.html b/local/static/kanban.html
index c1ed60c..74d4480 100644
--- a/local/static/kanban.html
+++ b/local/static/kanban.html
@@ -18,4 +18,4 @@ label{display:inline-flex;gap:8px;align-items:center;margin:5px}#kan{display:gri
 <p id="status" role="status"></p>
 <section id="reviews"></section><div id="kan"></div>
 <details><summary>Eventos locais de integração</summary><pre id="events"></pre></details>
-<script src="/upload.js"></script><script src="/kanban.js"></script></body></html>
+<script src="/upload.js"></script><script src="/kanban.js?v=operator-email-1"></script></body></html>