> For the complete documentation index, see [llms.txt](https://docs.devolutions.net/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.devolutions.net/rdm/knowledge-base/troubleshooting-articles/invalid-certificate-error-when-updating-remote-desktop-manager.md).

# Invalid certificate error when updating Remote Desktop Manager

Remote Desktop Manager shows an "Invalid certificate" error message when attempting to update from a version earlier than 2023.2.34.

As a security precaution, Remote Desktop Manager includes a list of accepted certificates to ensure the updates are distributed by Devolutions (a method named certificate pinning).

### Solution

To solve this issue, manually download ans install the update via your browser.

1. In the Remote Desktop Manager ribbon, go to ***Help – Check for updates***.
2. In the ***Update available*** tab that opens, click ***Download***, then ***Download update using your default browser***. You browser opens and the download should start.

   <figure><img src="https://cdnweb.devolutions.net/docs/docs_en_kb_KB2342.png" alt=""><figcaption></figcaption></figure>
3. When the download is complete, click on the downloaded file and follow the installation process.


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