---
title: What's new in v4?
slug: '3243'
canonical_url: https://docs.coveo.com/en/3243/
collection: coveo-for-salesforce
source_format: adoc
---
# What's new in v4?
As of the [release of Coveo for Salesforce v4](https://docs.coveo.com/en/3236#april-2020-release-v4-2-initial-release), some changes have been introduced into the Coveo for Salesforce AppExchange package.

The most important change is the removal of non-Lightning Locker compliant Coveo components.
For more information on the effects these changes may have on your implementation, see the [Upgrading from v3 to v4 FAQ](https://docs.coveo.com/en/3240/).

When upgrading to Coveo for Salesforce v4, you may need to migrate some of your Coveo Lightning components.
The [Migrating components from Salesforce API 39 to API 40+](https://docs.coveo.com/en/3222/) article provides detailed information to help you with the migration process.