diff --git a/benchmarks/sdk-upgrades-ruby/solution/subscription-billing-migration/server/Gemfile b/benchmarks/sdk-upgrades-ruby/solution/subscription-billing-migration/server/Gemfile
index 7aa98ed8..49507a0e 100644
--- a/benchmarks/sdk-upgrades-ruby/solution/subscription-billing-migration/server/Gemfile
+++ b/benchmarks/sdk-upgrades-ruby/solution/subscription-billing-migration/server/Gemfile
@@ -1,6 +1,6 @@
 source 'https://rubygems.org'
 
-gem 'sinatra', '~> 4.1.0'
+gem 'sinatra', '~> 4.2.0'
 gem 'rack', '>= 3.2.6'
 gem 'rackup', '~> 2.1'
 gem 'stripe', '~> 15.0'  # Upgraded from ~> 13.0 to ~> 15.0
diff --git a/benchmarks/sdk-upgrades-ruby/solution/subscription-billing-migration/server/Gemfile.lock b/benchmarks/sdk-upgrades-ruby/solution/subscription-billing-migration/server/Gemfile.lock
index 83353594..aa5b818f 100644
--- a/benchmarks/sdk-upgrades-ruby/solution/subscription-billing-migration/server/Gemfile.lock
+++ b/benchmarks/sdk-upgrades-ruby/solution/subscription-billing-migration/server/Gemfile.lock
@@ -4,13 +4,12 @@ GEM
     base64 (0.3.0)
     dotenv (2.8.1)
     logger (1.7.0)
-    mustermann (3.0.4)
-      ruby2_keywords (~> 0.0.1)
+    mustermann (3.1.1)
     nio4r (2.7.5)
     puma (6.6.1)
       nio4r (~> 2.0)
     rack (3.2.6)
-    rack-protection (4.1.1)
+    rack-protection (4.2.0)
       base64 (>= 0.1.0)
       logger (>= 1.6.0)
       rack (>= 3.0.0, < 4)
@@ -19,12 +18,11 @@ GEM
       rack (>= 3.0.0)
     rackup (2.3.1)
       rack (>= 3)
-    ruby2_keywords (0.0.5)
-    sinatra (4.1.1)
+    sinatra (4.2.0)
       logger (>= 1.6.0)
       mustermann (~> 3.0)
       rack (>= 3.0.0, < 4)
-      rack-protection (= 4.1.1)
+      rack-protection (= 4.2.0)
       rack-session (>= 2.0.0, < 3)
       tilt (~> 2.0)
     stripe (15.5.0)
@@ -39,7 +37,7 @@ DEPENDENCIES
   puma (~> 6.0)
   rack (>= 3.2.6)
   rackup (~> 2.1)
-  sinatra (~> 4.1.0)
+  sinatra (~> 4.2.0)
   stripe (~> 15.0)
 
 BUNDLED WITH