---
lang: en
title: 'CHANGELOG Docs'
keywords: LoopBack 4.0, LoopBack 4
sidebar: lb4_sidebar
permalink: /doc/en/lb4/changelog.index.html
---

## CHANGELOG

### packages

- [@loopback/authentication](changelogs/packages/authentication/CHANGELOG.md)
- [@loopback/authorization](changelogs/packages/authorization/CHANGELOG.md)
- [@loopback/boot](changelogs/packages/boot/CHANGELOG.md)
- [@loopback/booter-lb3app](changelogs/packages/booter-lb3app/CHANGELOG.md)
- [@loopback/build](changelogs/packages/build/CHANGELOG.md)
- [@loopback/cli](changelogs/packages/cli/CHANGELOG.md)
- [@loopback/context](changelogs/packages/context/CHANGELOG.md)
- [@loopback/core](changelogs/packages/core/CHANGELOG.md)
- [@loopback/eslint-config](changelogs/packages/eslint-config/CHANGELOG.md)
- [@loopback/express](changelogs/packages/express/CHANGELOG.md)
- [@loopback/http-caching-proxy](changelogs/packages/http-caching-proxy/CHANGELOG.md)
- [@loopback/http-server](changelogs/packages/http-server/CHANGELOG.md)
- [@loopback/metadata](changelogs/packages/metadata/CHANGELOG.md)
- [@loopback/model-api-builder](changelogs/packages/model-api-builder/CHANGELOG.md)
- [@loopback/openapi-spec-builder](changelogs/packages/openapi-spec-builder/CHANGELOG.md)
- [@loopback/openapi-v3](changelogs/packages/openapi-v3/CHANGELOG.md)
- [@loopback/repository](changelogs/packages/repository/CHANGELOG.md)
- [@loopback/repository-json-schema](changelogs/packages/repository-json-schema/CHANGELOG.md)
- [@loopback/repository-tests](changelogs/packages/repository-tests/CHANGELOG.md)
- [@loopback/rest](changelogs/packages/rest/CHANGELOG.md)
- [@loopback/rest-crud](changelogs/packages/rest-crud/CHANGELOG.md)
- [@loopback/rest-explorer](changelogs/packages/rest-explorer/CHANGELOG.md)
- [@loopback/security](changelogs/packages/security/CHANGELOG.md)
- [@loopback/service-proxy](changelogs/packages/service-proxy/CHANGELOG.md)
- [@loopback/testlab](changelogs/packages/testlab/CHANGELOG.md)

### extensions

- [@loopback/apiconnect](changelogs/extensions/apiconnect/CHANGELOG.md)
- [@loopback/authentication-jwt](changelogs/extensions/authentication-jwt/CHANGELOG.md)
- [@loopback/authentication-passport](changelogs/extensions/authentication-passport/CHANGELOG.md)
- [@loopback/context-explorer](changelogs/extensions/context-explorer/CHANGELOG.md)
- [@loopback/cron](changelogs/extensions/cron/CHANGELOG.md)
- [@loopback/extension-health](changelogs/extensions/health/CHANGELOG.md)
- [@loopback/extension-logging](changelogs/extensions/logging/CHANGELOG.md)
- [@loopback/extension-metrics](changelogs/extensions/metrics/CHANGELOG.md)

### examples

- [@loopback/example-access-control-migration](changelogs/examples/access-control-migration/CHANGELOG.md)
- [@loopback/example-context](changelogs/examples/context/CHANGELOG.md)
- [@loopback/example-express-composition](changelogs/examples/express-composition/CHANGELOG.md)
- [@loopback/example-file-transfer](changelogs/examples/file-transfer/CHANGELOG.md)
- [@loopback/example-greeter-extension](changelogs/examples/greeter-extension/CHANGELOG.md)
- [@loopback/example-greeting-app](changelogs/examples/greeting-app/CHANGELOG.md)
- [@loopback/example-hello-world](changelogs/examples/hello-world/CHANGELOG.md)
- [@loopback/example-lb3-application](changelogs/examples/lb3-application/CHANGELOG.md)
- [@loopback/example-log-extension](changelogs/examples/log-extension/CHANGELOG.md)
- [@loopback/example-metrics-prometheus](changelogs/examples/metrics-prometheus/CHANGELOG.md)
- [@loopback/example-multi-tenancy](changelogs/examples/multi-tenancy/CHANGELOG.md)
- [@loopback/example-passport-login](changelogs/examples/passport-login/CHANGELOG.md)
- [@loopback/example-rest-crud](changelogs/examples/rest-crud/CHANGELOG.md)
- [@loopback/example-rpc-server](changelogs/examples/rpc-server/CHANGELOG.md)
- [@loopback/example-soap-calculator](changelogs/examples/soap-calculator/CHANGELOG.md)
- [@loopback/example-todo](changelogs/examples/todo/CHANGELOG.md)
- [@loopback/example-todo-list](changelogs/examples/todo-list/CHANGELOG.md)
- [@loopback/example-validation-app](changelogs/examples/validation-app/CHANGELOG.md)