diff --git a/appengine/rails-hello_world/Gemfile.lock b/appengine/rails-hello_world/Gemfile.lock
index 18f3197ea..40d191039 100644
--- a/appengine/rails-hello_world/Gemfile.lock
+++ b/appengine/rails-hello_world/Gemfile.lock
@@ -157,7 +157,7 @@ GEM
     puma (6.4.2)
       nio4r (~> 2.0)
     racc (1.8.1)
-    rack (2.2.20)
+    rack (2.2.22)
     rack-session (1.0.2)
       rack (< 3)
     rack-test (2.1.0)