diff --git a/web/static/js/app.js b/web/static/js/app.js
index e4fc14e..3935e82 100644
--- a/web/static/js/app.js
+++ b/web/static/js/app.js
@@ -713,6 +713,8 @@
         payload.status_id = Number(value);
       } else if (key === 'assigned_user_id') {
         payload.assigned_user_id = value ? Number(value) : null;
+      } else if (key === 'quantity') {
+        payload.quantity = Number(value) || 0;
       } else {
         payload[key] = value;
       }