PI Network said through its official X account that the Mainnet blockchain is moving through Protocol 22, and all validator nodes are required to upgrade to v22.1 before April 27, 2026. The official Pi Node page carries the same message, stating that the Mainnet protocol upgrade is in progress and every validator must move to v22.1.
Deadline, target version, and current desktop release
The update gives node operators a clear checklist. The cutoff date is April 27, 2026, the required version is v22.1, and the action must be completed before that date. The official page also lists Node desktop version 0.5.4 as the latest release. The practical point is simple: older nodes may no longer remain aligned with the active protocol after the deadline.
Validators remain central to Mainnet operations
According to the material, validators help support the functioning of the network. Crypto coverage cited in the source describes a validator as software typically run on laptops and desktops, used to validate transactions and help maintain consensus on the shared ledger. The source also says validator operations rely on the Stellar Consensus Protocol, which works through trusted groups that agree on valid transactions.
The official node page also ties validators to decentralization. It notes that users can run a node through a desktop app, making participation available through a more accessible setup rather than a highly specialized environment.
Protocol 22 is linked to the broader Mainnet rollout
This change is presented as more than a routine software refresh. The source connects it to PI Network’s ongoing Mainnet progress and points readers to recent technical work around Testnet smart contract release activity for added context. For node operators, the immediate issue is compatibility: if older nodes fall out of sync after the cutoff, validator participation could be affected.
The article also notes that upgrade deadlines can attract short-term market attention, though token price action still depends on demand, listings, liquidity, and the broader crypto market mood. No price figures or new listing details were provided in the source material.
Attention now shifts to validator completion rates
After the move to v22.1, the next thing under watch will be how smoothly validator operators complete the upgrade. A clean transition would support confidence in Mainnet operations. The source says observers are likely to keep tracking future Protocol 22 updates, validator activity, and additional PI Mainnet developments.
At this stage, the message is narrow and direct: validator nodes need to upgrade to v22.1 before April 27, 2026 to stay aligned with PI Network’s Mainnet protocol path.