diff --git a/Gemfile.lock b/Gemfile.lock
index eb0c2d3..ab7bb19 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,7 +1,7 @@
 GEM
   remote: http://rubygems.org/
   specs:
-    rack (2.1.4)
+    rack (2.2.6.4)
 
 PLATFORMS
   ruby