diff --git a/docs/serving/samples/hello-world/helloworld-ruby/Gemfile.lock b/docs/serving/samples/hello-world/helloworld-ruby/Gemfile.lock
index 309b7925e..79d8fdf43 100644
--- a/docs/serving/samples/hello-world/helloworld-ruby/Gemfile.lock
+++ b/docs/serving/samples/hello-world/helloworld-ruby/Gemfile.lock
@@ -3,7 +3,7 @@ GEM
   specs:
     mustermann (1.1.1)
       ruby2_keywords (~> 0.0.1)
-    rack (2.2.2)
+    rack (2.2.3)
     rack-protection (2.0.8.1)
       rack
     ruby2_keywords (0.0.2)