diff --git a/Gemfile.lock b/Gemfile.lock
index 44970d38b6..b70d7ce074 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -151,7 +151,7 @@ GEM
     public_suffix (3.1.1)
     pygments.rb (1.1.2)
       multi_json (>= 1.0.0)
-    rack (2.1.4)
+    rack (2.1.4.1)
     rainbow (3.0.0)
     rb-fsevent (0.10.3)
     rb-inotify (0.10.0)