diff --git a/Gemfile b/Gemfile
index a1284eb..3b92398 100644
--- a/Gemfile
+++ b/Gemfile
@@ -76,7 +76,7 @@ group :test do
   gem "shoulda", "~> 2.11"
   # Shoulda does not work nice on Ruby 1.9.3 and seems to need test-unit explicitely.
   gem "test-unit", :platforms => [:mri_19]
-  gem "mocha", "0.12.1"
+  gem "mocha", "0.12.3"
 end
 
 local_gemfile = File.join(File.dirname(__FILE__), "Gemfile.local")