I've noticed that as soon as soon as the ztable package is loaded all the tables in my markdown documents change font from sans serif to serif. This is reproducible:

`

title: "Ztable Test"
author: "some author"
date: "October 18, 2017"
output: html_document

knitr::opts_chunk$set(echo = TRUE)

Kable (from knitr) in markdown

cars <- cars
knitr::kable(head(cars))

`
The above renders with sans serif font. Now if I load ztable:

`

title: "Ztable Test"
author: "some author"
date: "October 18, 2017"
output: html_document

knitr::opts_chunk$set(echo = TRUE)

Kable (from knitr) in markdown

cars <- cars
knitr::kable(head(cars))

Using ztable

library(moonBook)
library(ztable)

options(ztable.type="html")
options(ztable.zebra=1)
options(ztable.zebra.color="platinum")
options(ztable.colnames.bold=TRUE)
ztable(head(cars))

`

All tables use serif fonts. How can I override this behavior? I want my fonts to remain sans serif.