sf/ggplot version hell....

Hi all,

I am trying to plot a simple feature object with ggplot but i can't find 
the proper ggplot version.
I am following : http://ggplot2.tidyverse.org/reference/ggsf.html

running R 3.4.3 fro win10 x64
I tried the newest version from? cran (ggplot 2.2.1)? but? keep ending 
up with 'could not find function "geom_sf"'

somehow I seem to miss? something

can somebody point me to (information with) the versions of sf and 
ggplot which do work ?

thanks in advance

Peter van Horssen