> For the complete documentation index, see [llms.txt](https://docs.thundervault.io/thundervault/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.thundervault.io/thundervault/thunder-vault-nft/upgrade-thunder-vault-nft.md).

# Upgrade Thunder Vault NFT

Thunder Vault NFT can be upgraded by merging the Thunder Vault NFTs.

To upgrade your Thunder Vault NFT you will require other Thunder Vault NFTs to be consumed in the upgrade. All Thunder Vault NFT that are used in the upgrade are burned.You will need to confirm the transaction and you also will require BNB in your account to cover any transaction gas fees.

There will be a failure rate in the upgrade process. When the upgrade fails, all the NFTs will be burned.

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