R Package "Maptools" Not Installing With R Version

Question

I was recently trying to install the package entitled, "maptools", as it is essential for my analysis. I tried the following and received this error:

install.packages("maptools")
WARNING: Rtools is required to build R packages but is not 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/ThisPC/AppData/Local/R/win-library/4.3’
(as ‘lib’ is unspecified)
Warning in install.packages :
package ‘maptools’ is not available for this version of R

Is anyone familiar with the version of maptools that is compatible with my version of R (version 4.3.3)?

Any help would be greatly appreciated!

Thanks!