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# How to Bump MetaMask's Version Automatically
```
npm run version:bump patch
```
MetaMask publishes using a loose [semver](https://semver.org/) interpretation. We divide the three segments of our version into three types of version bump:
## Major
Means a breaking change, either an API removed, or a major user expectation changed.
## Minor
Means a new API or new user feature.
## Patch
Means a fix for a bug, or correcting something that should have been assumed to work a different way.
# Bumping the version
`npm run version:bump $BUMP_TYPE` where `$BUMP_TYPE` is one of `major`, `minor`, or `patch`.
This will increment the version in the `app/manifest.json` and `CHANGELOG.md` files according to our current protocol, where the manifest's version is updated, and any line items currently under the changelog's "master" section are now under the new dated version section.
# Modifying the bump script
The script that is executed lives [here](../development/run-version-bump.js).
The main functions all live [here](../development/version-bump.js).
The test for this behavior is at `test/unit/development/version-bump-test.js`.
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