diff --git a/tests/Gemfile.lock b/tests/Gemfile.lock
index b304583..575c2dc 100644
--- a/tests/Gemfile.lock
+++ b/tests/Gemfile.lock
@@ -24,7 +24,7 @@ GEM
       racc (~> 1.4)
     public_suffix (4.0.6)
     racc (1.6.2)
-    rack (2.2.6.4)
+    rack (2.2.8.1)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
     rake (13.0.6)