diff --git a/Gemfile.lock b/Gemfile.lock
index 35ed936..5fa0160 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -7,7 +7,7 @@ GEM
   remote: https://rubygems.org/
   specs:
     diff-lcs (1.3)
-    rack (2.2.2)
+    rack (3.0.4.1)
     rake (13.0.1)
     rspec (3.9.0)
       rspec-core (~> 3.9.0)