diff --git a/Gemfile.lock b/Gemfile.lock
index ce4ba17..489fa15 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -44,7 +44,7 @@ GEM
       coderay (~> 1.0.5)
       method_source (~> 0.8)
       slop (~> 3.4)
-    rack (1.5.2)
+    rack (1.6.13)
     rack-mount (0.8.3)
       rack (>= 1.0.0)
     rack-protection (1.5.0)