diff --git a/Gemfile.lock b/Gemfile.lock
index 3c65520..5672917 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -108,7 +108,7 @@ GEM
     pandoc-ruby (2.1.4)
     parallel (1.20.0)
     public_suffix (4.0.6)
-    rack (2.2.3)
+    rack (2.2.6.4)
     rack-cors (1.1.1)
       rack (>= 2.0.0)
     rack-livereload (0.3.17)