How do I add a scrollbar to a dialog?

I have created a sharepoint dialog using the HostWebDialog="true" option in my custom action. The issue is that if the data in the dialog box is larger than can be displayed there, I cannot scroll to this data without highlighting text and then dragging my mouse down.

I was able to add a scrollbar to my page that is displayed in the dialog itself, but this scrollbar is maxed out and acts as if there is no where to scroll. The scroll bar doesnt seem to be on the dialog itself.

Is there a way to force a scroll bar onto the dialog directly, and not in the body of my page I am displaying in the dialog?