diff --git a/ruby/hello_world/Gemfile.lock b/ruby/hello_world/Gemfile.lock
index 965c5d3..49e8287 100644
--- a/ruby/hello_world/Gemfile.lock
+++ b/ruby/hello_world/Gemfile.lock
@@ -23,7 +23,7 @@ GEM
       multi_json (~> 1.3)
       multi_xml (~> 0.5)
       rack (>= 1.2, < 3)
-    rack (2.0.7)
+    rack (2.2.3)
 
 PLATFORMS
   ruby