diff --git a/example/animal-service/Gemfile b/example/animal-service/Gemfile
index 7c2be75d..a38884cf 100644
--- a/example/animal-service/Gemfile
+++ b/example/animal-service/Gemfile
@@ -7,7 +7,7 @@ group :development, :test do
 end
 
 gem 'rake'
-gem 'rack', '>= 3.0.0'
+gem 'rack', '>= 3.1.5'
 gem 'sqlite3'
 gem 'sequel'
 gem 'sinatra', '>= 4.0.0'
diff --git a/example/animal-service/Gemfile.lock b/example/animal-service/Gemfile.lock
index 837b9e4a..9f0e12dc 100644
--- a/example/animal-service/Gemfile.lock
+++ b/example/animal-service/Gemfile.lock
@@ -49,7 +49,7 @@ GEM
       coderay (~> 1.1)
       method_source (~> 1.0)
     racc (1.8.0)
-    rack (3.1.4)
+    rack (3.1.7)
     rack-protection (4.0.0)
       base64 (>= 0.1.0)
       rack (>= 3.0.0, < 4)
@@ -107,7 +107,7 @@ PLATFORMS
 DEPENDENCIES
   pact!
   pry
-  rack (>= 3.0.0)
+  rack (>= 3.1.5)
   rake
   rspec
   sequel
diff --git a/example/zoo-app/Gemfile b/example/zoo-app/Gemfile
index 8438ed97..eb52922c 100644
--- a/example/zoo-app/Gemfile
+++ b/example/zoo-app/Gemfile
@@ -9,5 +9,5 @@ end
 
 gem 'rake'
 
-gem 'rack', '>= 3.0.0'
+gem 'rack', '>= 3.1.5'
 gem 'httparty', '>= 0.21.0'
\ No newline at end of file
diff --git a/example/zoo-app/Gemfile.lock b/example/zoo-app/Gemfile.lock
index 37e63787..b4237fd7 100644
--- a/example/zoo-app/Gemfile.lock
+++ b/example/zoo-app/Gemfile.lock
@@ -63,7 +63,7 @@ GEM
       coderay (~> 1.1)
       method_source (~> 1.0)
     racc (1.8.0)
-    rack (3.1.4)
+    rack (3.1.7)
     rack-test (2.1.0)
       rack (>= 1.3)
     rackup (2.1.0)
@@ -107,7 +107,7 @@ DEPENDENCIES
   pact!
   pact_broker-client
   pry
-  rack (>= 3.0.0)
+  rack (>= 3.1.5)
   rake
   rspec