diff --git a/apps/epp_proxy/priv/test_backend_app/Gemfile.lock b/apps/epp_proxy/priv/test_backend_app/Gemfile.lock
index 533b49d..9580f05 100644
--- a/apps/epp_proxy/priv/test_backend_app/Gemfile.lock
+++ b/apps/epp_proxy/priv/test_backend_app/Gemfile.lock
@@ -4,7 +4,7 @@ GEM
     nio4r (2.5.2)
     puma (4.3.5)
       nio4r (~> 2.0)
-    rack (2.0.8)
+    rack (2.2.3)
     rack-unreloader (1.7.0)
     roda (3.21.0)
       rack