diff --git a/Casks/rubymine633.rb b/Casks/rubymine633.rb
index 17826d7c1..1bcc8506b 100644
--- a/Casks/rubymine633.rb
+++ b/Casks/rubymine633.rb
@@ -9,7 +9,7 @@ cask :v1 => 'rubymine633' do
   app 'RubyMine.app'
 
   postflight do
-    system '/usr/libexec/PlistBuddy', '-c', 'Set :JVMOptions:JVMVersion 1.6+', "#{staged_path}/RubyMine.app/Contents/Info.plist"
+    plist_set(':JVMOptions:JVMVersion', '1.6+')
   end
   zap :delete => [
                   "~/Library/Application Support/RubyMine#{version.gsub('.','')}",