# What changed in @stacks/encryption

> 2 changes in @stacks/encryption 5 from its official release notes, upgrade guides and advisories: 2 breaking. Each one cited. Sources checked 2026-10-27. HTML: https://unstale.sh/npm/@stacks/encryption/

To see which of these apply to a repository, run `npx @unstale/cli init` in it.

## @stacks/encryption 5

### Breaking changes

- The prefix changed from Stacks Message Signing to Stacks Signed Message, which may affect message-signing compatibility. (5.0.0) — [release notes](https://github.com/stx-labs/stacks.js/blob/HEAD/CHANGELOG.md)
- The project is moving away from Buffer to Uint8Arrays, which may change the byte types developers use with its APIs. (5.0.0) — [release notes](https://github.com/stx-labs/stacks.js/blob/HEAD/CHANGELOG.md)