# Stable Mainnet v1.8.0 Upgrade By [Stable](https://blog.stable.xyz) · 2026-08-20 --- We are pleased to announce that Stable Mainnet will be upgraded to **Stable v1.8.0 on August 26, 2026.** Stable v1.8.0 is a protocol upgrade focused on two capabilities that payment infrastructure needs at scale: **throughput and predictability**. The upgrade introduces coordinated improvements across transaction execution, mempool processing, state storage, and transaction inclusion, including Guaranteed Blockspace for eligible traffic, helping the network process higher transaction volumes efficiently while delivering more consistent performance under sustained demand. Together, these improvements strengthen Stable's capacity to support high-volume payments and settlement activity 24/7, giving enterprise applications the performance and transaction certainty needed to move more critical financial activity onchain. Upgrade Overview ---------------- Stable v1.8.0 improves the full transaction lifecycle, from the moment a transaction is submitted to when it is executed and permanently recorded onchain. * Upgrade activation: August 26, 2026 (around 07:00 UTC) * Upgrade height: 36976000  * Recommended upgrade preparation: At least 24 hours before activation if using Stablevisor or Cosmovisor. * For node operators not using Stablevisor or Cosmovisor, wait for the node to reach the upgrade height and replace the binary once the node stops at that height. What the Upgrade Means ---------------------- * For users, this means more consistent transaction performance during periods of high demand. * For developers and businesses, it means applications can operate multiple transaction streams from the same account, reduce delays caused by transaction queues, and gain more reliable inclusion for eligible priority traffic. * For validators, it means using available computing and storage resources more efficiently, allowing the network to scale more effectively. Stable v1.8.0 Upgrade Highlights  ================================= **At a high level, v1.8.0 delivers two major improvements: higher throughput and more predictable transaction inclusion.** Higher Throughput  ------------------ Stable can process more transactions by executing independent activity in parallel, reducing unnecessary work after each block, and making state storage more efficient. Instead of relying on one optimization, the upgrade addresses multiple bottlenecks across the transaction lifecycle. More Predictable Transaction Inclusion -------------------------------------- Applications can submit transactions across independent nonce channels, preventing one delayed transaction from blocking subsequent transactions from the same account. Through Guaranteed Blockspace, the network can also reserve block capacity for selected traffic categories when configured through governance. This gives eligible, time-sensitive payment and settlement traffic more reliable access to blockspace during periods of high network activity. **These improvements are introduced through four protocol-level upgrades:** * Optimistic Parallel Execution * Selective RecheckTx * MemIAVL * 2D Nonce and Guaranteed Blockspace Each upgrade targets a different stage of the transaction lifecycle. Together, they improve how Stable accepts, prioritizes, executes, and stores transactions.  Guaranteed Blockspace for Enterprise Payments --------------------------------------------- For enterprises, v1.8.0 delivers greater transaction capacity and more reliable execution for high-volume payment and settlement flows. Independent transaction streams and Guaranteed Blockspace ensures that critical activities continue smoothly without affecting transaction speed or finality, even during periods of high network demand. Together, these improvements strengthen the network for payment providers, exchanges, and treasury platforms operating 24/7/365, **providing a stronger foundation for moving high-volume payment and settlement activity from traditional rails onchain.** Improving the Transaction Lifecycle ----------------------------------- Every transaction moves through a series of stages before it is finalized onchain. A user or application submits it, the network selects it for inclusion in a block, executes it, and commits it to storage. After the block is committed, remaining pending transactions are reviewed again. Stable v1.8.0 improves each of these stages: * **Submission**: Applications can submit transactions through independent nonce channels, so one delayed transaction does not block the rest. * **Inclusion**: Block capacity can be reserved for selected transaction categories during periods of high activity. * **Execution**: Independent transactions can run simultaneously across multiple CPU cores while preserving deterministic results across the network. * **Storage**: State changes can be recorded with substantially fewer disk writes. * **Post-block processi**ng: Nodes recheck only pending transactions that may have been affected by the latest block. The result is a network designed to sustain higher transaction volumes while maintaining predictable performance. Built for High-Volume Payments ------------------------------ Stable v1.8.0 strengthens the network's foundation for high-volume payments, exchange settlements, treasury operations, and agent-driven transactions as activity continues to grow. With this upgrade, we are improving the transaction lifecycle end to end so Stable can support higher volumes with greater efficiency, reliability, and predictability. Build on Stable --------------- **Documentation**: [https://docs.stable.xyz](https://docs.stable.xyz) **Mainnet Hub:** [https://hub.stable.xyz](https://hub.stable.xyz) **StablePay**: [https://www.stablepay.to/](https://www.stablepay.to/) **Blog**: [https://blog.stable.xyz](https://blog.stable.xyz) **X**: [@Stable](https://x.com/Stable) **Community**: [https://discord.gg/stablexyz](https://discord.gg/stablexyz) --- *Originally published on [Stable](https://blog.stable.xyz/stable-mainnet-v180-upgrade)*