Custom font for HTMLLabel?

Is there a way to load a custom font face into an HTMLLabel in Bokeh? I am embedding figures into a custom HTML template and have custom font faces loading fine in other aspects. When drilling down into the rendered DOM I discovered that the HTML label is overriding styles using a shadow DOM. Without those overrides my font style would be the chosen style for the element. Is there a way to load the custom font face into the HTMLLabel DOM? Thanks in advance.