To update the PHP version on Plesk please follow the below guide.
Go to your subdomain on Plesk then press PHP Settings.
![](https://handbook.gooey.dev/wp-content/uploads/2021/07/YxjepX-1024x254.png)
The change the PHP version to the version you need.
![](https://handbook.gooey.dev/wp-content/uploads/2021/07/frMq9o-1024x496.png)
Then press Apply and the server will restart with the updated PHP version on your subdomain.