diff --git a/Gemfile b/Gemfile
index 48ec038..1d58a67 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,5 +1,5 @@
 source 'https://rubygems.org'
 ruby '2.2.1'
 
-gem 'sinatra', '~>1.4.4'
-gem 'thin'
+gem 'sinatra', '~> 2.0.0'
+gem 'thin', '>= 1.7.0'