diff --git a/Gemfile.lock b/Gemfile.lock
index 0f31e3fb..fcfe0762 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -30,7 +30,7 @@ GEM
       coderay (~> 1.0.5)
       method_source (~> 0.7.1)
       slop (>= 2.4.4, < 3)
-    rack (1.4.1)
+    rack (1.6.13)
     rake (10.1.0)
     rspec (2.14.0)
       rspec-core (~> 2.14.0)