Network Upgrades
Mina protocol evolves through network upgrades (hard forks) that introduce new features and improvements. Each upgrade requires node operators to update their software to remain compatible with the network.
The Mesa preflight network hard-forked at 2026-04-27 13:00 UTC. The post-fork chain is now running the Mesa release 4.0.0-preflight-3f038cb, which raises the transaction protocol version to 5.0.0.
Operators must run 4.0.0-preflight-3f038cb to remain on the preflight network. Earlier builds — including the stop-slot release 4.0.0-preflight-stop-2967b39 — are no longer compatible with the post-fork chain.
zkApp developers must update to o1js@3.0.0-mesa.698ca, which targets transaction protocol v5.0.0; earlier o1js releases will produce transactions that the post-fork network rejects.
See Preflight Network for the full upgrade path.
| Upgrade | Status | Date | Key Changes |
|---|---|---|---|
| Berkeley | Completed | June 2024 | zkApp programmability, recursive proofs, new transaction model, archive database migration |
| Mesa | Preflight hard fork completed | 2026-04-27 13:00 UTC (preflight) | Transaction protocol v5.0.0, automode upgrades, simplified archive migration |