diff --git a/Gemfile.lock b/Gemfile.lock
index 0bfefe1..e572dbe 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -67,7 +67,7 @@ GEM
     nifty-generators (0.4.6)
     pg (0.14.0)
     polyglot (0.3.3)
-    rack (1.4.1)
+    rack (1.4.7)
     rack-cache (1.2)
       rack (>= 0.4)
     rack-ssl (1.3.2)