If your project is growing and needs more resources, you can upgrade your hosting plan at any time from your account's hPanel! 🚀
If you have the Hosting Dashboard enabled, you can go to Websites → Manage, search for Upgrade on the sidebar and click on it:

Or on the Details page - just click on the Upgrade Plan button:

Alternatively, if you are using the Website Builder for all your websites, head to the Billing → Subscriptions section of your panel and click on the > arrow next to your service to open the subscription details. You will see the option to upgrade there:

NOTE:
If you see a Services section instead of Subscriptions, contact our Customer Success team and we will help you upgrade your hosting plan 😊
Additional resources:
Read this article on what happens after you upgrade your current hosting plan
If you want to test the upgrade without commitment, you can boost your account
If you have a VPS plan, follow this guide: How to Upgrade Your VPS Server