diff --git a/Casks/rstudio.rb b/Casks/rstudio.rb
index a81835d3fb8..6cb58df19e5 100644
--- a/Casks/rstudio.rb
+++ b/Casks/rstudio.rb
@@ -3,7 +3,7 @@ cask :v1 => 'rstudio' do
   sha256 'e211c0645540b8c668824b6fecdfd19820fe937c4db4432abc7aba06e7efd9e6'
 
   # rstudio.org is the official download host per the vendor homepage
-  url "http://download1.rstudio.org/RStudio-#{version}.dmg"
+  url "https://download1.rstudio.org/RStudio-#{version}.dmg"
   name 'RStudio'
   homepage 'http://www.rstudio.com/'
   license :affero