How can I resize the text in a widget?

I installed some widgets from the Loop Habit Tracker onto the home screen of the Nova Launcher. Unfortunately, the font size of the text in the widgets is too small. I tried increasing the setting at Nova Launcher --> Settings --> Home screen --> Layout --> Label --> Size. This did not change the size of the text in the widgets. I think this setting only impacts the size of the labels for the apps. How can I resize the text in a widget?