diff --git a/Gemfile.lock b/Gemfile.lock
index bd11fa4..e19cfe6 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -75,7 +75,7 @@ GEM
       sprockets-helpers (~> 1.0.0)
       sprockets-sass (~> 1.0.0)
     multi_json (1.8.2)
-    rack (1.5.2)
+    rack (1.6.13)
     rack-coderay (0.2.0)
       coderay (>= 0.8.312)
       hpricot (>= 0.8.1)