diff --git a/Gemfile.lock b/Gemfile.lock
index 5ae83d5..60f1dfc 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -26,7 +26,7 @@ GEM
     multi_json (1.3.6)
     multi_xml (0.5.1)
     nokogiri (1.5.5)
-    rack (1.4.1)
+    rack (1.6.13)
     rack-protection (1.2.0)
       rack
     rack-test (0.6.1)