diff --git a/appengine/flexible/hello_world/Gemfile b/appengine/flexible/hello_world/Gemfile
index a27d5dfb4..8676f52b6 100644
--- a/appengine/flexible/hello_world/Gemfile
+++ b/appengine/flexible/hello_world/Gemfile
@@ -25,7 +25,7 @@ group :test do
   gem "rspec_junit_formatter"
 end
 
-gem "puma", "~> 6.6"
+gem "puma", "~> 7.2"
 gem "rackup", "~> 2.2"
 
 # [END gae_flex_quickstart_dependencies]
diff --git a/appengine/flexible/hello_world/Gemfile.lock b/appengine/flexible/hello_world/Gemfile.lock
index 590c1aba8..c618b0522 100644
--- a/appengine/flexible/hello_world/Gemfile.lock
+++ b/appengine/flexible/hello_world/Gemfile.lock
@@ -6,8 +6,8 @@ GEM
     logger (1.7.0)
     mustermann (3.0.3)
       ruby2_keywords (~> 0.0.1)
-    nio4r (2.7.4)
-    puma (6.6.0)
+    nio4r (2.7.5)
+    puma (7.2.1)
       nio4r (~> 2.0)
     rack (3.1.16)
     rack-protection (4.1.1)
@@ -51,7 +51,7 @@ PLATFORMS
   ruby
 
 DEPENDENCIES
-  puma (~> 6.6)
+  puma (~> 7.2)
   rack-test
   rackup (~> 2.2)
   rspec