diff --git a/Gemfile.lock b/Gemfile.lock
index 04a9200..3e267ca 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -59,7 +59,7 @@ GEM
     multi_json (1.3.6)
     pg (0.14.1)
     polyglot (0.3.3)
-    rack (1.4.1)
+    rack (1.4.7)
     rack-cache (1.2)
       rack (>= 0.4)
     rack-protection (1.2.0)