python pdfkit: increase font size
<p>I transformed an HTML file into a pdf simply by:</p>

<pre><code>pdfkit.from_file("cpp.html",'cpp.pdf')
</code></pre>

<p>Problem is that the font-size is very small.</p>

<p>How to increase the font-size (both of headers and paragraphs) using pdfkit? Obviously I want the headers font to remain bigger than the paragraphs font.</p>

<p>I guess I have to tweak the options, but I can't find how.</p>