Not compatibile with latest versin of R and RTools

[MislavSag]

I have upgraded my R to version 4.0.0. Unfortunately, this package is not compatibly with the latest version of R and Rtools:

> install.packages('docker')
WARNING: Rtools isrequired to build R packages but isnot currently installed. Please download and install the appropriate version of Rtools before proceeding:

https://cran.rstudio.com/bin/windows/Rtools/
Installing package into ‘C:/Users/Mislav/Documents/R/win-library/4.0’
(as ‘lib’ is unspecified)
Warning in install.packages :
  package ‘docker’ is not available (for R version 4.0.0)

Is it possible to upgrade requirements to R 4.0 and latest RTools?