# 04a) SSL/TLS settings

1. To begin, we must ensure that the SSL setting in Cloudflare is set to "**Flexible**" in order for Cosmos and Let's Encrypt to work properly.
2. So head into the `SSL/TLS` menu.

<figure><img src="https://i.imgur.com/HSaTiSh.png" alt="" width="375"><figcaption></figcaption></figure>

3. And make sure the encryption mode is set to **Flexible**.

<figure><img src="https://i.imgur.com/G8jMrIp.png" alt="" width="375"><figcaption></figcaption></figure>

4. Head back to the **Overview** menu: <img src="https://i.imgur.com/vWC0ktH.png" alt="" data-size="line">

<figure><img src="https://i.imgur.com/glben48.gif" alt=""><figcaption></figcaption></figure>

### On to the next step!