Read a .RDS file from remote host using Shiny

I'm hosting my first shiny app from www.shinyapps.io. My r script uses a glm I created locally that I have stored as a .RDS file.

How can I read this file into my application directly using a free file host such as dropbox or google drive? (or another better alternative?)

test<-readRDS(gzcon(url("https://www.dropbox.com/s/p3bk57sqvlra1ze/strModel.RDS?dl=0")))

however, I get the error:

Error in readRDS(gzcon(url("https://www.dropbox.com/s/p3bk57sqvlra1ze/strModel.RDS?dl=0"))) :   unknown input format

I assume this is because the URL doesn't lead directly to the file but rather a landing page for dropbox?

That being said, I can't seem to find any free file hosting sites that have that functionality.

As always, I'm sure the solution is very obvious, any help is appreciated.