diff --git a/Casks/sketch-toolbox.rb b/Casks/sketch-toolbox.rb
index 09b9fe6fdfc..349bb694420 100644
--- a/Casks/sketch-toolbox.rb
+++ b/Casks/sketch-toolbox.rb
@@ -1,6 +1,6 @@
 cask "sketch-toolbox" do
-  version "0.5.1"
-  sha256 "e8e06d8caf87af2334655de49cc0e4a11e057ea7907e380f216476be52576065"
+  version "0.5.1,051"
+  sha256 :no_check
 
   url "http://sketchtoolbox.com/Sketch%20Toolbox.zip"
   appcast "http://sketchtoolbox.com/updates/appcast.xml"