Issue with installing R Shiny - r

Question

I'm using Version 1.1.453 of RStudio. I'm receiving an error when trying to install R Shiny using the following code (note: I've tried several different mirrors).
install.packages("shiny", repo='http://nbcgib.uesc.br/mirrors/cran/', dependencies = TRUE)
Here's the error message I'm getting. Any sense of what's going on?
Installing package into ‘C:/Users/NHK/Documents/R/win-library/3.2’
(as ‘lib’ is unspecified)
also installing the dependencies ‘httpuv’, ‘later’, ‘promises’, ‘rlang’
There are binary versions available but the source versions are later:
binary source needs_compilation
httpuv 1.3.3 1.4.4.1 TRUE
shiny 1.0.2 1.1.0 FALSE
Binaries will be installed
Packages which are only available in source form, and may need compilation of
C/C++/Fortran: ‘later’ ‘promises’ ‘rlang’
These will not be installed
trying URL
'http://nbcgib.uesc.br/mirrors/cran/bin/windows/contrib/3.2/httpuv_1.3.3.zip'
Content type 'application/zip' length 872756 bytes (852 KB)
downloaded 852 KB
package ‘httpuv’ successfully unpacked and MD5 sums checked
The downloaded binary packages are in
C:\Users\NHK\AppData\Local\Temp\RtmpCqqSmI\downloaded_packages
installing the source package ‘shiny’
trying URL 'http://nbcgib.uesc.br/mirrors/cran/src/contrib/shiny_1.1.0.tar.gz'
Content type 'application/x-gzip' length 2350156 bytes (2.2 MB)
downloaded 2.2 MB
ERROR: dependencies 'later', 'promises', 'rlang' are not available for package 'shiny'
* removing 'C:/Users/NHK/Documents/R/win-library/3.2/shiny'
Warning in install.packages :
running command '"C:/PROGRA~1/R/R-32~1.2/bin/x64/R" CMD INSTALL -l
"C:\Users\NHK\Documents\R\win-library\3.2"
C:\Users\N~1\AppData\Local\Temp\RtmpCqqSmI/downloaded_packages/shiny_1.1.0.
tar.gz' had status 1
Warning in install.packages :
installation of package ‘shiny’ had non-zero exit status
The downloaded source packages are in
‘C:\Users\NHK\AppData\Local\Temp\RtmpCqqSmI\downloaded_packages’