diff --git a/Gemfile.lock b/Gemfile.lock
index e44091cf..2e357c56 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -62,7 +62,7 @@ GEM
     json (1.8.3)
     json_pure (1.8.0)
     multi_json (1.7.4)
-    rack (1.5.2)
+    rack (1.6.13)
     rack-protection (1.5.0)
       rack
     rack-test (0.6.2)