diff --git a/Gemfile.lock b/Gemfile.lock
index 8d6b744..d76e080 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -103,7 +103,7 @@ GEM
     pygments.rb (0.3.3)
       posix-spawn (~> 0.3.6)
       yajl-ruby (~> 1.1.0)
-    rack (1.4.5)
+    rack (1.5.2)
     rack-cache (1.2)
       rack (>= 0.4)
     rack-ssl (1.3.2)