diff --git a/app/main.py b/app/main.py
index ebbb8e1..bedc72a 100644
--- a/app/main.py
+++ b/app/main.py
@@ -232,7 +232,7 @@ function render(members) {
       '<td>' + esc(reset) + '</td>' +
       '<td><div class="adjust">' +
       '<input id="add-' + i(m.email) + '" placeholder="+$" />' +
-      '<button onclick="addBalance(\'' + esc(m.email) + '\')">Add</button>' +
+      '<button data-email="' + esc(m.email) + '" onclick="addBalance(this.dataset.email)">Add</button>' +
       '</div></td>' +
       '</tr>';
   }).join('');