diff --git a/Casks/webstorm.rb b/Casks/webstorm.rb
index 308f15573e..c2048f43ff 100644
--- a/Casks/webstorm.rb
+++ b/Casks/webstorm.rb
@@ -9,6 +9,6 @@ cask :v1 => 'webstorm' do
   app 'WebStorm.app'
 
   postflight do
-    system '/usr/libexec/PlistBuddy', '-c', 'Set :JVMOptions:JVMVersion 1.6+', "#{staged_path}/WebStorm.app/Contents/Info.plist"
+    plist_set(':JVMOptions:JVMVersion', '1.6+')
   end
 end