diff --git a/Gemfile.lock b/Gemfile.lock
index c9f4daa..7da92e8 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -13,7 +13,7 @@ GEM
     multi_json (1.8.2)
     mysql2 (0.3.14)
     parseconfig (1.0.2)
-    rack (1.5.2)
+    rack (1.6.13)
     rack-protection (1.5.1)
       rack
     rack-test (0.6.2)