--- title: May 28, 2021 release (5.0.971.3) slug: l4md0264 canonical_url: https://docs.coveo.com/en/l4md0264/ collection: coveo-for-sitecore-v5 source_format: adoc --- # May 28, 2021 release (5.0.971.3) > **Important** > > Per the Coveo [Version Support Lifecycle policy](https://docs.coveo.com/en/1485/), this Coveo for Sitecore 5 release has reached end of support. > See [available Coveo for Sitecore releases](https://docs.coveo.com/en/2274/). > > Even if this release is no longer supported, you must still perform some of its [upgrade steps](#upgrade-steps) to [upgrade to a more recent version](https://docs.coveo.com/en/2155#multi-release-upgrade) of Coveo for Sitecore. > Even if this release is no longer supported, you must still perform some of its upgrade steps to [upgrade to a more recent version](https://docs.coveo.com/en/2155#multi-release-upgrade) of Coveo for Sitecore.
This release includes the 2.10083.4 version of the JavaScript Search Framework (see February 2021 Release (v2.10083)).
When using a CDN with the Coveo Hive framework, this release includes the latest 2.10083 version of the JavaScript Search Framework (see Choosing between local and CDN Coveo JavaScript resource files).
This section summarizes the new features and fixed support cases introduced in the Coveo for Sitecore May 28, 2021 release (5.0.971.3).
> **Important** > > Coveo Hive search interfaces now perform front-end calls through the [reverse proxy](https://docs.coveo.com/en/3401/) to generate search tokens, even when you disable the proxy. > [Caching reverse proxy endpoint responses](https://docs.coveo.com/en/n74a0288/) may cause issues.| Identifier | Case | Fixed support case |
|---|---|---|
| WEB-4921 | 00065381, 00065717 | Improved Hive initialization events to better support custom scripts. |
| WEB-4990 | 00067854 | Changed the Default Frame.cshtml, Modular Frame - 3 columns.cshtml, and Modular Frame.cshtml files to fix issue with the Coveo Searchbox not being displayed when allowQueriesWithoutKeywords is enabled. |
| Identifier | Bug fix |
|---|---|
| WEB-4947 | Fixed an inaccurate Rebuild and Refresh button tooltip message in the Command Center. |
| WEB-4970 | Fixed issue with the publishing of the Coveo for Sitecore 10.1 WDP package. |
| WEB-4977 | Fixed issue with custom field mappings in Coveo being wiped out after indexing. |
This section describes how to upgrade Coveo for Sitecore from March 26, 2021 (5.0.943.3) to May 28, 2021 (5.0.971.3). If you're upgrading over multiple versions, Coveo has a procedure to streamline the process.
| For the best Coveo for Sitecore experience, always follow the Leading Practices When Upgrading Coveo for Sitecore. |
| Make sure the Microsoft MVC security update MS14-059 is installed on every Sitecore host in your environment.. |
When prompted to overwrite items, select Overwrite, then click Apply to all.
Note You might be prompted twice with this question. Select the Overwrite option and click Apply to all both times. |
Once the installation is completed, make sure that you restart both the Sitecore client and server.

In the Sitecore Content Editor, perform a publish site action. This ensures any changes related to Coveo components in the upgrade are published to the web database.