Add, remove, and update packages

Let’s add Zod to validate the JSON sent to our notes API:

bun add zod

Bun installs the package, adds it to dependencies, and updates bun.lock.

Development tools belong in devDependencies. We already installed TypeScript this way:

bun add --dev typescript

You can install a specific version when the project requires it:

bun add zod@4.1.0

Remove a package

Use the package name to remove it:

bun remove zod

Bun removes the entry from package.json, updates the lockfile, and removes the installed package when nothing else needs it.

Add Zod again before continuing:

bun add zod

Update dependencies

Update packages within the version ranges declared in package.json:

bun update

Update one package with:

bun update zod

Use bun update --latest carefully. It can move packages beyond their current version ranges and introduce breaking changes.

My advice is to update a small group at a time. Read the release notes, run the tests, and commit the matching package.json and bun.lock changes together.