diff --git a/Gemfile.lock b/Gemfile.lock
index 48ea940..ac5fb29 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -8,7 +8,7 @@ GEM
     mime-types (1.17.2)
     nanoc3 (3.2.4)
       cri (~> 2.0)
-    rack (1.4.0)
+    rack (2.1.4)
     rack-contrib (1.1.0)
       rack (>= 0.9.1)
     rack-rewrite (1.2.1)