diff --git a/Formula/storm.rb b/Formula/storm.rb
index dd49a9be9b..4080f20a08 100644
--- a/Formula/storm.rb
+++ b/Formula/storm.rb
@@ -6,9 +6,9 @@ class Storm < Formula
   sha1 'abb533c90f5b9eeaafb9136670091fc894fce169'
 
   devel do
-    url 'https://dl.dropbox.com/u/133901206/storm-0.9.0-wip16.zip'
-    sha1 'c0e24b5fdcacccd4df460ff79165c3e12c60b8a3'
-    version '0.9.0-wip16'
+    url 'https://dl.dropbox.com/u/133901206/storm-0.9.0-wip21.zip'
+    sha1 '0007b8feba30a126dce8a97412d440b967cb3d26'
+    version '0.9.0-wip21'
   end
 
   def install