diff --git a/Gemfile.lock b/Gemfile.lock
index 24f185f..d35102c 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -22,7 +22,7 @@ GEM
     nokogiri (1.6.0)
       mini_portile (~> 0.5.0)
     power_assert (0.2.6)
-    rack (1.5.2)
+    rack (1.6.13)
     rack-protection (1.5.1)
       rack
     rack-test (0.6.2)