The current recommended version of the software for mainnet is [v0.15.1](https://github.com/Kava-Labs/kava/releases/tag/v0.15.1). The master branch of this repository often contains considerable development work since the last mainnet release and is __not__ runnable on mainnet.
The scheduled mainnet upgrade to `kava-8` took place on August 30th, 2021 at 15:00 UTC. The current version of Kava for `kava-8` is [__v0.15.1__](https://github.com/Kava-Labs/kava/releases/tag/v0.15.1).
Use this [guide](https://github.com/Kava-Labs/kava/blob/master/docs/validator_guide.md) to set up a mainnet validator. Note that this is a minimal guide and does not cover more advanced topics like [sentry node architecture](https://github.com/stakefish/cosmos-validator-design) and [double signing protection](https://github.com/tendermint/tmkms). It is strongly recommended that any parties considering validating do additional research. If you have questions, please join the active conversation in the #validators thread of the [__Kava Discord Channel__](https://discord.com/invite/kQzh3Uv).