diff --git a/Gemfile.lock b/Gemfile.lock
index b76d1ec..3aca730 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -17,7 +17,7 @@ GEM
     multi_json (1.10.1)
     nokogiri (1.6.6.2)
       mini_portile (~> 0.6.0)
-    rack (1.6.11)
+    rack (1.6.13)
     rack-protection (1.5.3)
       rack
     rack-test (0.6.3)