diff --git a/Gemfile.lock b/Gemfile.lock
index f0fdbae..1c5e8b8 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -85,7 +85,7 @@ GEM
       activesupport (>= 3.1)
     parallel (1.13.0)
     public_suffix (3.0.3)
-    rack (2.0.6)
+    rack (2.2.1)
     rack-livereload (0.3.17)
       rack
     rake (12.3.2)