GMX will disable its v2.2b smart contracts on Arbitrum, Avalanche and MegaETH on September 14, 2026, completing a deprecation process announced on August 17. Developers and protocols using direct contract calls or third-party integrations must migrate to v2.2c, which is already deployed on all three networks. The upgrade adds expanded invariant checks and role-management protections, while changing funding mechanisms, oracle validations and collateral caps. Integrators must also update ExchangeRouter, Reader and SimulationRouter addresses, revise ABIs and struct definitions, and configure each network separately. Users accessing GMX through its official interface are not expected to experience a disruption.