diff --git a/Gemfile.lock b/Gemfile.lock
index f34f7ac5a..8a1cd065f 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -239,7 +239,7 @@ GEM
       options (~> 2.3.0)
     pygments.rb (0.2.4)
       rubypython (~> 0.5.3)
-    rack (1.4.3)
+    rack (1.4.7)
     rack-cache (1.2)
       rack (>= 0.4)
     rack-openid (1.3.1)