diff --git a/testapp/Gemfile.lock b/testapp/Gemfile.lock
index f01a34b..484af22 100644
--- a/testapp/Gemfile.lock
+++ b/testapp/Gemfile.lock
@@ -122,7 +122,7 @@ GEM
       protocol-hpack (~> 1.4)
       protocol-http (~> 0.2)
     protocol-redis (0.5.0)
-    rack (2.1.1)
+    rack (2.2.3)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
     rails (6.0.2.1)