diff --git a/test/sample_apps/rack_app/Gemfile.lock b/test/sample_apps/rack_app/Gemfile.lock
index 5a3dbbe..b60f2e6 100644
--- a/test/sample_apps/rack_app/Gemfile.lock
+++ b/test/sample_apps/rack_app/Gemfile.lock
@@ -1,7 +1,7 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    rack (2.0.6)
+    rack (2.2.8.1)
 
 PLATFORMS
   ruby