diff --git a/Gemfile.lock b/Gemfile.lock
index 336ed65..fa7e204 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -18,7 +18,7 @@ GEM
     jruby-openssl (0.7.7)
       bouncy-castle-java (>= 1.5.0146.1)
     multi_json (1.3.6)
-    rack (1.4.1)
+    rack (2.0.7)
     rack-test (0.6.1)
       rack (>= 1.0)
     rake (0.9.2.2)