diff --git a/Casks/sourcetree.rb b/Casks/sourcetree.rb
index da3b90241..721e710f9 100644
--- a/Casks/sourcetree.rb
+++ b/Casks/sourcetree.rb
@@ -1,4 +1,4 @@
-class SourceTree < Cask
+class Sourcetree < Cask
   url 'http://downloads.atlassian.com/software/sourcetree/SourceTree_1.5.4.dmg'
   homepage 'http://www.sourcetreeapp.com/'
   version '1.5.4'