diff --git a/frameworks/sinatra/Dockerfile b/frameworks/sinatra/Dockerfile
index 5ac048ee5..3db5f9d88 100644
--- a/frameworks/sinatra/Dockerfile
+++ b/frameworks/sinatra/Dockerfile
@@ -11,7 +11,8 @@ ENV RUBY_YJIT_ENABLE=1
 ENV RUBY_MN_THREADS=1
 ENV RACK_ENV=production
 ENV WEB_CONCURRENCY=auto
-ENV MAX_THREADS=4
+ENV MAX_THREADS=3
+ENV MAX_IO_THREADS=10
 
 WORKDIR /app
 
diff --git a/frameworks/sinatra/Gemfile b/frameworks/sinatra/Gemfile
index 91472ed32..e81e0b888 100644
--- a/frameworks/sinatra/Gemfile
+++ b/frameworks/sinatra/Gemfile
@@ -1,7 +1,7 @@
 source 'https://rubygems.org'
 
 gem 'sinatra', '~> 4.1'
-gem 'puma', '~> 7.2'
+gem 'puma', '~> 8.0'
 gem 'pg', '~> 1.5'
 gem 'json'
 gem 'concurrent-ruby'
diff --git a/frameworks/sinatra/Gemfile.lock b/frameworks/sinatra/Gemfile.lock
index eefb48f40..3c95bb5a5 100644
--- a/frameworks/sinatra/Gemfile.lock
+++ b/frameworks/sinatra/Gemfile.lock
@@ -10,7 +10,7 @@ GEM
     nio4r (2.7.5)
     pg (1.6.3-arm64-darwin)
     pg (1.6.3-x86_64-linux)
-    puma (7.2.0)
+    puma (8.0.1)
       nio4r (~> 2.0)
     rack (3.2.6)
     rack-protection (4.2.1)
@@ -38,7 +38,7 @@ DEPENDENCIES
   connection_pool
   json
   pg (~> 1.5)
-  puma (~> 7.2)
+  puma (~> 8.0)
   sinatra (~> 4.1)
 
 CHECKSUMS
@@ -51,7 +51,7 @@ CHECKSUMS
   nio4r (2.7.5) sha256=6c90168e48fb5f8e768419c93abb94ba2b892a1d0602cb06eef16d8b7df1dca1
   pg (1.6.3-arm64-darwin) sha256=7240330b572e6355d7c75a7de535edb5dfcbd6295d9c7777df4d9dddfb8c0e5f
   pg (1.6.3-x86_64-linux) sha256=5d9e188c8f7a0295d162b7b88a768d8452a899977d44f3274d1946d67920ae8d
-  puma (7.2.0) sha256=bf8ef4ab514a4e6d4554cb4326b2004eba5036ae05cf765cfe51aba9706a72a8
+  puma (8.0.1) sha256=7b94e50c07655718c1fb8ae41a11fc06c7d61293208b3aa608ff71a46d3ad37c
   rack (3.2.6) sha256=5ed78e1f73b2e25679bec7d45ee2d4483cc4146eb1be0264fc4d94cb5ef212c2
   rack-protection (4.2.1) sha256=cf6e2842df8c55f5e4d1a4be015e603e19e9bc3a7178bae58949ccbb58558bac
   rack-session (2.1.2) sha256=595434f8c0c3473ae7d7ac56ecda6cc6dfd9d37c0b2b5255330aa1576967ffe8
diff --git a/frameworks/sinatra/config.ru b/frameworks/sinatra/config.ru
index ff331f82e..77e6a059e 100644
--- a/frameworks/sinatra/config.ru
+++ b/frameworks/sinatra/config.ru
@@ -17,6 +17,21 @@ class MethodGuard
   end
 end
 
+# Threads marked as IO bound are allowed to go over Puma's max thread limit.
+class MarkAsIOBoundThreads
+  def initialize(app)
+    @app = app
+  end
+
+  def call(env)
+    if env['PATH_INFO'].start_with? '/baseline'
+      env["puma.mark_as_io_bound"].call
+    end
+    @app.call(env)
+  end
+end
+
+use MarkAsIOBoundThreads
 use MethodGuard
 use Rack::Deflater
 run App
diff --git a/frameworks/sinatra/puma.rb b/frameworks/sinatra/puma.rb
index e4859fc8e..63c90bbfb 100644
--- a/frameworks/sinatra/puma.rb
+++ b/frameworks/sinatra/puma.rb
@@ -1,4 +1,5 @@
 threads ENV.fetch('MAX_THREADS', 4).to_i
+max_io_threads ENV.fetch("MAX_IO_THREADS", 10).to_i
 
 tls_cert_path = ENV.fetch('TLS_CERT', '/certs/server.crt')
 tls_key_path = ENV.fetch('TLS_KEY', '/certs/server.key')