diff --git a/Casks/sourcetree.rb b/Casks/source-tree.rb
similarity index 90%
rename from Casks/sourcetree.rb
rename to Casks/source-tree.rb
index 89f3632bb56..57f8539085e 100644
--- a/Casks/sourcetree.rb
+++ b/Casks/source-tree.rb
@@ -1,4 +1,4 @@
-class Sourcetree < Cask
+class SourceTree < Cask
   url 'http://downloads.atlassian.com/software/sourcetree/SourceTree_1.7.3.dmg'
   homepage 'http://www.sourcetreeapp.com/'
   version '1.7.3'