# Changes to Render TLS certificates issued by Let's Encrypt

## What is the change?

On September 30th 2021, there will be a change in how older browsers and devices trust Let's Encrypt certificates that Render uses for [TLS on all applications and static sites](tls). This will result in a minor decrease in TLS compatibility for old clients and devices.

## Am I affected?

Devices and browsers running up-to-date software will continue working normally. Let's Encrypt has taken steps to maintain support for the vast majority of older devices as well. If you run a large website, or you need to support less common software (particularly non-browser software), please review Let's Encrypt's [documentation](https://letsencrypt.org/docs/dst-root-ca-x3-expiration-september-2021/) about this change.

## What should I do?

There is no action required by you. Please reach out to <support@render.com> if you have any questions.