diff --git a/Rakefile b/Rakefile
index 9852627..d001fba 100644
--- a/Rakefile
+++ b/Rakefile
@@ -1,3 +1,7 @@
+#FIXME Necessary hack to avoid the need of downgrading rubygems on rails 2.3.5
+# http://stackoverflow.com/questions/5564251/uninitialized-constant-activesupportdependenciesmutex
+require 'thread'
+
 # Add your own tasks in files placed in lib/tasks ending in .rake,
 # for example lib/tasks/capistrano.rake, and they will automatically be available to Rake.
 
--
libgit2 0.21.2