diff --git a/Gemfile b/Gemfile
index 832413f7..342e5b5c 100644
--- a/Gemfile
+++ b/Gemfile
@@ -26,5 +26,5 @@ end
 
 group(:test) do
   gem('test-unit', '~> 3.6.2')
-  gem('warning', '~> 1.3.0')
+  gem('warning', '~> 1.4.0')
 end