How can I reload a HTML page opened as a dialog?

How can I reload a HTML page opened as a dialog?

I have a HTML page with a list report and a stateless form embedded to it. This page is opened in a dialog to show info about the selected record.

I wish the HTML page gets reloaded when I click on 'Update' button on stateless form.
I already tried openUrl("#Script.page.reload", "same window") and it works if this page is loaded on whole window, but when it's opened as a dialog it reloads parent page.

Any tips on how can I achieve this behavior?
Using iframes maybe?