diff --git a/Gemfile.lock b/Gemfile.lock
index 425308a..660ab17 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -40,7 +40,7 @@ GEM
     mime-types (1.19)
     nokogiri (1.5.9)
     posix-spawn (0.3.6)
-    rack (1.4.1)
+    rack (2.2.3)
     rack-jekyll (0.3.5)
       jekyll
       rack