diff --git a/Gemfile.lock b/Gemfile.lock
index 9deb744..ecd50c6 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -81,7 +81,7 @@ GEM
     nokogiri (1.5.6)
     pg (0.14.0)
     polyglot (0.3.3)
-    rack (1.4.4)
+    rack (1.4.7)
     rack-cache (1.2)
       rack (>= 0.4)
     rack-ssl (1.3.2)