diff --git a/Gemfile b/Gemfile
index 923403ea7..c0631ed9e 100644
--- a/Gemfile
+++ b/Gemfile
@@ -4,7 +4,7 @@ source "http://rubygems.org"
 group :development do
   gem 'rake'
   gem 'jbundle', :git => "git@github.com:mloughran/jbundle.git"
-  gem 'sinatra'
+  gem 'sinatra', '>= 2.0.0'
   gem 'pusher'
   gem 'aws-s3'
   gem 'httparty'