diff --git a/Gemfile.lock b/Gemfile.lock
index 7f1c112..1d5284a 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -68,7 +68,7 @@ GEM
       cocaine (~> 0.4.0)
       mime-types
     polyglot (0.3.3)
-    rack (1.4.3)
+    rack (1.4.7)
     rack-cache (1.2)
       rack (>= 0.4)
     rack-cors (0.2.7)