1. Log in to your cPanel account
(e.g.: yourdomain.com/cpanel or cpanel.yourdomain.com)

cPanel overview
2. Click on Select PHP Version

3. Click on Options

4. Search for and change the following values:
memory_limitupload_max_filesizepost_max_size 
⚙️ The changes will be applied immediately.
Important notes
- post_max_size must be greater than or equal to upload_max_filesize;
- Some values may not be applicable, depending on the hosting plan.