diff --git a/instrumentation/sinatra/example/Gemfile b/instrumentation/sinatra/example/Gemfile
index 0ddf65b87..c6bb91d5d 100644
--- a/instrumentation/sinatra/example/Gemfile
+++ b/instrumentation/sinatra/example/Gemfile
@@ -5,9 +5,10 @@
 # SPDX-License-Identifier: Apache-2.0
 
 source 'https://rubygems.org'
-gem 'puma'
 gem 'opentelemetry-api'
 gem 'opentelemetry-common'
 gem 'opentelemetry-instrumentation-sinatra'
 gem 'opentelemetry-sdk'
+gem 'puma'
+gem 'rackup'
 gem 'sinatra'