diff --git a/appengine/flexible/hello_world/Gemfile b/appengine/flexible/hello_world/Gemfile
index 0bde2bbf7..90922784a 100644
--- a/appengine/flexible/hello_world/Gemfile
+++ b/appengine/flexible/hello_world/Gemfile
@@ -19,9 +19,12 @@ gem "sinatra"
 gem "webrick", "~> 1.8"
 
 # [END gae_flex_quickstart_dependencies]
-ruby "~>3.2"
+ruby "~>3.4"
 group :test do
   gem "rack-test"
   gem "rspec"
   gem "rspec_junit_formatter"
 end
+
+gem "puma", "~> 6.6"
+gem "rackup", "~> 2.2"
diff --git a/appengine/flexible/hello_world/Gemfile.lock b/appengine/flexible/hello_world/Gemfile.lock
index 7079a10de..45d9e2c33 100644
--- a/appengine/flexible/hello_world/Gemfile.lock
+++ b/appengine/flexible/hello_world/Gemfile.lock
@@ -1,50 +1,67 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    diff-lcs (1.5.0)
-    mustermann (3.0.0)
+    base64 (0.2.0)
+    diff-lcs (1.6.1)
+    logger (1.7.0)
+    mustermann (3.0.3)
       ruby2_keywords (~> 0.0.1)
-    rack (2.2.8.1)
-    rack-protection (3.1.0)
-      rack (~> 2.2, >= 2.2.4)
-    rack-test (2.1.0)
+    nio4r (2.7.4)
+    puma (6.6.0)
+      nio4r (~> 2.0)
+    rack (3.1.13)
+    rack-protection (4.1.1)
+      base64 (>= 0.1.0)
+      logger (>= 1.6.0)
+      rack (>= 3.0.0, < 4)
+    rack-session (2.1.0)
+      base64 (>= 0.1.0)
+      rack (>= 3.0.0)
+    rack-test (2.2.0)
       rack (>= 1.3)
-    rspec (3.12.0)
-      rspec-core (~> 3.12.0)
-      rspec-expectations (~> 3.12.0)
-      rspec-mocks (~> 3.12.0)
-    rspec-core (3.12.2)
-      rspec-support (~> 3.12.0)
-    rspec-expectations (3.12.3)
+    rackup (2.2.1)
+      rack (>= 3)
+    rspec (3.13.0)
+      rspec-core (~> 3.13.0)
+      rspec-expectations (~> 3.13.0)
+      rspec-mocks (~> 3.13.0)
+    rspec-core (3.13.3)
+      rspec-support (~> 3.13.0)
+    rspec-expectations (3.13.3)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.12.0)
-    rspec-mocks (3.12.6)
+      rspec-support (~> 3.13.0)
+    rspec-mocks (3.13.2)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.12.0)
-    rspec-support (3.12.1)
+      rspec-support (~> 3.13.0)
+    rspec-support (3.13.2)
     rspec_junit_formatter (0.6.0)
       rspec-core (>= 2, < 4, != 2.12.0)
     ruby2_keywords (0.0.5)
-    sinatra (3.1.0)
+    sinatra (4.1.1)
+      logger (>= 1.6.0)
       mustermann (~> 3.0)
-      rack (~> 2.2, >= 2.2.4)
-      rack-protection (= 3.1.0)
+      rack (>= 3.0.0, < 4)
+      rack-protection (= 4.1.1)
+      rack-session (>= 2.0.0, < 3)
       tilt (~> 2.0)
-    tilt (2.2.0)
-    webrick (1.8.1)
+    tilt (2.6.0)
+    webrick (1.9.1)
 
 PLATFORMS
   ruby
 
+
 DEPENDENCIES
+  puma (~> 6.6)
   rack-test
+  rackup (~> 2.2)
   rspec
   rspec_junit_formatter
   sinatra
   webrick (~> 1.8)
 
 RUBY VERSION
-   ruby 3.2.2p53
+  ruby 3.4.2
 
 BUNDLED WITH
-   2.4.19
+   2.6.6
\ No newline at end of file
diff --git a/appengine/standard-hello_world/Gemfile b/appengine/standard-hello_world/Gemfile
index dae0902d0..def34f73d 100644
--- a/appengine/standard-hello_world/Gemfile
+++ b/appengine/standard-hello_world/Gemfile
@@ -24,3 +24,6 @@ group :test do
   gem "rspec"
   gem "rspec_junit_formatter"
 end
+
+gem "puma", "~> 6.6"
+gem "rackup", "~> 2.2"
diff --git a/appengine/standard-hello_world/Gemfile.lock b/appengine/standard-hello_world/Gemfile.lock
index a8c882a5c..b72630dd4 100644
--- a/appengine/standard-hello_world/Gemfile.lock
+++ b/appengine/standard-hello_world/Gemfile.lock
@@ -6,6 +6,9 @@ GEM
     logger (1.6.6)
     mustermann (3.0.3)
       ruby2_keywords (~> 0.0.1)
+    nio4r (2.7.4)
+    puma (6.6.0)
+      nio4r (~> 2.0)
     rack (3.1.10)
     rack-protection (4.1.0)
       base64 (>= 0.1.0)
@@ -16,6 +19,8 @@ GEM
       rack (>= 3.0.0)
     rack-test (2.1.0)
       rack (>= 1.3)
+    rackup (2.2.1)
+      rack (>= 3)
     rspec (3.12.0)
       rspec-core (~> 3.12.0)
       rspec-expectations (~> 3.12.0)
@@ -46,11 +51,13 @@ PLATFORMS
   ruby
 
 DEPENDENCIES
+  puma (~> 6.6)
   rack-test
+  rackup (~> 2.2)
   rspec
   rspec_junit_formatter
   sinatra (~> 4.1.0)
   webrick (~> 1.7)
 
 BUNDLED WITH
-   2.4.19
+   2.6.6
diff --git a/appengine/standard-hello_world/app.yaml b/appengine/standard-hello_world/app.yaml
index 4f1e9f9cf..295ef5256 100644
--- a/appengine/standard-hello_world/app.yaml
+++ b/appengine/standard-hello_world/app.yaml
@@ -13,7 +13,7 @@
 # limitations under the License.
 
 # [START gae_standard_quickstart_yaml]
-runtime: ruby33
+runtime: ruby34
 entrypoint: bundle exec ruby app.rb
 instance_class: F2
 # [END gae_standard_quickstart_yaml]
diff --git a/functions/helloworld/get/Gemfile b/functions/helloworld/get/Gemfile
index 82619603d..975c510aa 100644
--- a/functions/helloworld/get/Gemfile
+++ b/functions/helloworld/get/Gemfile
@@ -15,5 +15,6 @@
 # [START functions_framework_version]
 source "https://rubygems.org"
 
+gem "base64", "~> 0.2"
 gem "functions_framework", "~> 1.4"
 # [END functions_framework_version]
diff --git a/functions/helloworld/get/Gemfile.lock b/functions/helloworld/get/Gemfile.lock
index 0394eaf58..64e02ce77 100644
--- a/functions/helloworld/get/Gemfile.lock
+++ b/functions/helloworld/get/Gemfile.lock
@@ -1,6 +1,7 @@
 GEM
   remote: https://rubygems.org/
   specs:
+    base64 (0.2.0)
     cloud_events (0.7.1)
     functions_framework (1.4.1)
       cloud_events (>= 0.7.0, < 2.a)
@@ -15,6 +16,7 @@ PLATFORMS
   ruby
 
 DEPENDENCIES
+  base64 (~> 0.2)
   functions_framework (~> 1.4)
 
 BUNDLED WITH
diff --git a/functions/helloworld/pubsub/Gemfile b/functions/helloworld/pubsub/Gemfile
index 3959c5f9e..f111efe70 100644
--- a/functions/helloworld/pubsub/Gemfile
+++ b/functions/helloworld/pubsub/Gemfile
@@ -14,4 +14,5 @@
 
 source "https://rubygems.org"
 
+gem "base64", "~> 0.2"
 gem "functions_framework", "~> 1.4"
diff --git a/functions/helloworld/pubsub/Gemfile.lock b/functions/helloworld/pubsub/Gemfile.lock
index 0394eaf58..64e02ce77 100644
--- a/functions/helloworld/pubsub/Gemfile.lock
+++ b/functions/helloworld/pubsub/Gemfile.lock
@@ -1,6 +1,7 @@
 GEM
   remote: https://rubygems.org/
   specs:
+    base64 (0.2.0)
     cloud_events (0.7.1)
     functions_framework (1.4.1)
       cloud_events (>= 0.7.0, < 2.a)
@@ -15,6 +16,7 @@ PLATFORMS
   ruby
 
 DEPENDENCIES
+  base64 (~> 0.2)
   functions_framework (~> 1.4)
 
 BUNDLED WITH
diff --git a/run/helloworld/Dockerfile b/run/helloworld/Dockerfile
index 4307fcd61..e56aa9614 100644
--- a/run/helloworld/Dockerfile
+++ b/run/helloworld/Dockerfile
@@ -17,7 +17,7 @@
 
 # Use the official Ruby image.
 # https://hub.docker.com/_/ruby
-FROM ruby:3.2-buster
+FROM ruby:3.4
 
 # Install production dependencies.
 WORKDIR /usr/src/app
diff --git a/run/helloworld/Gemfile b/run/helloworld/Gemfile
index d6ce5da20..3622c7a06 100644
--- a/run/helloworld/Gemfile
+++ b/run/helloworld/Gemfile
@@ -11,3 +11,6 @@ group :test do
   gem "rspec-retry"
   gem "rubysl-securerandom"
 end
+
+gem "puma", "~> 6.6"
+gem "rackup", "~> 1.0"
diff --git a/run/helloworld/Gemfile.lock b/run/helloworld/Gemfile.lock
index a0b907f48..4068f7e96 100644
--- a/run/helloworld/Gemfile.lock
+++ b/run/helloworld/Gemfile.lock
@@ -15,11 +15,17 @@ GEM
     mustermann (3.0.0)
       ruby2_keywords (~> 0.0.1)
     netrc (0.11.0)
+    nio4r (2.7.4)
+    puma (6.6.0)
+      nio4r (~> 2.0)
     rack (2.2.8.1)
     rack-protection (3.1.0)
       rack (~> 2.2, >= 2.2.4)
     rack-test (2.1.0)
       rack (>= 1.3)
+    rackup (1.0.1)
+      rack (< 3)
+      webrick
     rest-client (2.1.0)
       http-accept (>= 1.7.0, < 2.0)
       http-cookie (>= 1.0.2, < 2.0)
@@ -57,12 +63,15 @@ GEM
     unf (0.1.4)
       unf_ext
     unf_ext (0.0.8.2)
+    webrick (1.9.1)
 
 PLATFORMS
   ruby
 
 DEPENDENCIES
+  puma (~> 6.6)
   rack-test
+  rackup (~> 1.0)
   rest-client
   rspec
   rspec-retry
@@ -72,4 +81,4 @@ DEPENDENCIES
   thin
 
 BUNDLED WITH
-   2.4.19
+   2.6.6