diff --git a/Gemfile.lock b/Gemfile.lock
index 6bdb311a0..be5ac9bc0 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -87,7 +87,7 @@ GEM
       multi_json (~> 1.3)
       multi_xml (~> 0.5)
       rack (>= 1.2, < 3)
-    rack (1.6.5)
+    rack (2.2.6.2)
     rake (10.0.4)
     sass (3.4.3)
     sprockets (3.6.0)