diff --git a/web/static/js/task.js b/web/static/js/task.js
index ab07488..2d7f85f 100644
--- a/web/static/js/task.js
+++ b/web/static/js/task.js
@@ -147,6 +147,18 @@ function renderActions() {
     catch (e) { toast(e.message, 'err'); }
   };
 
+  // link to the upstream ticket (same affordance as the atomization board)
+  if (t.external && t.external.url) {
+    const a = document.createElement('a');
+    a.className = 'btn';
+    a.style.marginRight = '8px';
+    a.href = t.external.url;
+    a.target = '_blank';
+    a.rel = 'noopener';
+    a.textContent = 'Source ↗';
+    host.appendChild(a);
+  }
+
   if (root.dataset.isDeveloper === '1') {
     if (t.status === 'published' && !myClaim()) add('Request assignment', post('claim', { note: '' }), true);
     if (myClaim() && ['published', 'claim_requested'].includes(t.status)) add('Withdraw request', post('claim/withdraw'));