diff --git a/Casks/rstudio-preview.rb b/Casks/rstudio-preview.rb
index bfe799891..b58594909 100644
--- a/Casks/rstudio-preview.rb
+++ b/Casks/rstudio-preview.rb
@@ -1,7 +1,7 @@
 class RstudioPreview < Cask
-  url 'https://s3.amazonaws.com/rstudio-dailybuilds/RStudio-0.98.456.dmg'
+  url 'https://s3.amazonaws.com/rstudio-dailybuilds/RStudio-0.98.477.dmg'
   homepage 'http://www.rstudio.com/ide/download/preview'
-  version '0.98.456'
-  sha1 '2b07e15aeff833d67970b86b66f656824cdf2811'
+  version '0.98.477'
+  sha1 '6337d117c59b03270c51f796862141289200ac1d'
   link 'RStudio.app'
 end