diff --git a/Gemfile.lock b/Gemfile.lock
index 9cbd727..f3abc12 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -111,7 +111,7 @@ GEM
     polyglot (0.3.3)
     quiet_assets (1.0.1)
       railties (~> 3.1)
-    rack (1.4.1)
+    rack (1.4.7)
     rack-cache (1.2)
       rack (>= 0.4)
     rack-ssl (1.3.2)