diff --git a/Gemfile.lock b/Gemfile.lock
index af9273d..7e38e2a 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -58,7 +58,7 @@ GEM
       json
       nokogiri (>= 1.4.0)
     nokogiri (1.5.0)
-    rack (1.4.1)
+    rack (2.2.13)
     rake (0.9.2.2)
     thor (0.14.6)
     uglifier (1.0.4)