Protocol 23 Update: Testnet reset Aug. 14, Mainnet Upgrade Sept. 3

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Justin

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Aug 4, 2025, 3:36:53 PMAug 4

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Hey, everyone! Some important updates to the Protocol 23 timeline:

August 14: Testnet reset!
August 14: Stable builds of key software available
September 3: Mainnet upgrade vote

The August 14 Testnet reset will clear all Testnet ledger entries including account, asset, and contract data, so please be prepared to recreate any you need to persist! For tips and more info, see: https://developers.stellar.org/docs/learn/fundamentals/networks#testnet-and-futurenet-data-reset

Also, after the Testnet reset, you will need to upgrade to new versions of your Stellar-related software including Stellar Core, RPC, Horizon, and Stellar SDKs as soon as possible to ensure Testnet compatibility. You need to do that even if you upgraded in advance of the Testnet upgrade in July!

Apologies for the inconvenience, and for the short notice: normally, we don't reset Testnet as part of a protocol upgrade, but this time it's necessary due to some changes to Stellar Core. The August 14 Testnet reset will replace the previously scheduled Q3 Testnet reset.

In addition to the Testnet reset and later release dates, the Mainnet vote is now scheduled for September 3.

To stay up to date on the latest timeline and releases, check the Protocol 23 Upgrade Guide: https://stellar.org/blog/developers/protocol-23-upgrade-guide