diff --git a/Gemfile.lock b/Gemfile.lock
index db26945..08877d9 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -91,7 +91,7 @@ GEM
     prism (1.4.0)
     public_suffix (6.0.1)
     racc (1.8.1)
-    rack (3.1.12)
+    rack (3.1.21)
     rainbow (3.1.1)
     rake (13.2.1)
     rbs (3.9.2)