Basic-tier applications now require Router 2.0

Change effective on 07 July 2025

All Basic-tier applications now require Router 2.0 as we continue to roll the new router out to all Common Runtime apps. All new and migrated apps running Basic dynos use Router 2.0. If your Basic apps have the http-routing-2-dot-0 feature flag, you can no longer disable it.

We begin migrating Production-tier applications later this month.

Check out the Legacy Router end-of-life FAQ for updates on tentative migration timelines and the Router 2.0 article for more details.