NestJS · Senior · Question 45 of 75

What's a sensible approach to upgrading a large Nest app to a new major version?

1Never upgrade
✓Correct answer: Read the migration guide, upgrade all @nestjs/* packages together, fix breaking changes (e.g. Express 5 routes in v11), and rely on e2e tests
3Upgrade one @nestjs package at a time across months

Explanation

Mismatched @nestjs/* versions cause subtle DI and type errors. Keep them aligned.

Further reading

NestJS: Migration guide ↗

Test yourself

Take the NestJS · Senior quiz: questions and options are shuffled, and you get a review of your mistakes at the end.