# Snowtype 0.17.0
> This release includes multiple change:.
> Source: https://docs.snowplow.io/release-notes/snowtype-0-17-0/
> Documentation index: https://docs.snowplow.io/llms.txt
> Date: 2026-03-23
> Components: Event Studio, Developer tools

> **\[23-Mar-2026]**

This release includes multiple change:

- Enable locking mechanism for event specifications
- Support for Swift 6, addressing breaking changes in the language

**Snowtype now uses a lock file to pin event specification versions**

Running `snowtype generate` will now create a lock file in the same directory as your config file. Subsequent `generate` calls will use this lock file to ensure your tracking code is always generated against a consistent, known set of event specification versions, rather than automatically pulling the latest.

**To update your event specification versions**, run `snowtype update`. This will bump the versions recorded in the lock file to the latest published versions by default.

A few useful flags for `snowtype update`:

- `--yes` — automatically regenerates tracking code after updating, so you don't need to run `generate` separately
- `--latestDraft` — bumps to the latest draft version rather than the latest published version

You can also scope the update to a subset of your configuration:

```text
# Check for updates for specific event specifications only
npx @snowplow/snowtype@latest update --eventSpecs <id1> <id2>

# Check for updates for specific tracking plans only
npx @snowplow/snowtype@latest update --dataProducts <id1> <id2>
```