diff --git a/Gemfile.lock b/Gemfile.lock
index d46fc8c..196540e 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -48,7 +48,7 @@ GEM
     mime-types (1.22)
     multi_json (1.7.2)
     polyglot (0.3.3)
-    rack (1.4.5)
+    rack (1.4.7)
     rack-cache (1.2)
       rack (>= 0.4)
     rack-ssl (1.3.3)