v1.5.3 Sepolia Arsia
Arsia is the next major Mantle network upgrade, following the Limb fork.
Arsia is scheduled to activate on Mantle Sepolia at L2 block timestamp 1774422000 (Wednesday, March 25, 2026, 07:00:00 UTC).
Warning
All Mantle Sepolia node operators must upgrade to this release before the activation time.