diff --git a/Gemfile.lock b/Gemfile.lock
index f616d99d..8d4fc3a7 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -83,7 +83,7 @@ GEM
     pygments.rb (0.6.0)
       posix-spawn (~> 0.3.6)
       yajl-ruby (~> 1.1.0)
-    rack (1.6.4)
+    rack (1.6.13)
     rack-cache (1.2)
       rack (>= 0.4)
     rack-protection (1.5.3)