Ggplot2 Installation Error

Hey everyone, new programmer here doing a school project. Need ggplot2 and eventually caret to complete it, but the below is coming up when I try to install ggplot2.

> library(ggplot2)
Error: package or namespace load failed for ‘ggplot2’ in loadNamespace(j <- i[[1L]], c(lib.loc, .libPaths()), versionCheck = vI[[j]]):
 namespace ‘pillar’ 1.0.1 is being loaded, but >= 1.1.0 is required

Checked to make sure my RStudio is up to date and it is. If anyone has any suggestions it would be much appreciated!

Try updating pillar to 1.1.0 and then try loading ggplot2 again.