diff --git a/Gemfile.lock b/Gemfile.lock
index 153680a..aa83af1 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -32,7 +32,7 @@ GEM
     mime-types (1.21)
     multi_json (1.6.1)
     nokogiri (1.5.6)
-    rack (1.5.2)
+    rack (1.6.13)
     rack-protection (1.3.2)
       rack
     rack-test (0.6.2)