diff --git a/Gemfile b/Gemfile
index 62acd920..69b51851 100644
--- a/Gemfile
+++ b/Gemfile
@@ -14,7 +14,9 @@ gem 'rake'
 gem 'rack', github: 'rack/rack'
 gem 'rack-test', '>= 0.6.2'
 gem "minitest", "~> 5.0"
-gem 'tool', '~> 0.2'
+
+gem "mustermann", github: "sinatra/mustermann"
+gem "rack-protection", github: "sinatra/rack-protection"
 
 if RUBY_ENGINE == 'jruby'
   gem 'nokogiri', '!= 1.5.0'