diff --git a/child/Gemfile.lock b/child/Gemfile.lock
index 8061032..ff147db 100644
--- a/child/Gemfile.lock
+++ b/child/Gemfile.lock
@@ -105,7 +105,7 @@ GEM
     public_suffix (4.0.3)
     puma (4.3.1)
       nio4r (~> 2.0)
-    rack (2.1.2)
+    rack (2.2.3.1)
     rack-cors (1.1.1)
       rack (>= 2.0.0)
     rack-proxy (0.6.5)