diff --git a/Gemfile b/Gemfile
index 12ff8ed..c0601e2 100644
--- a/Gemfile
+++ b/Gemfile
@@ -55,6 +55,7 @@ group :development, :test do
   gem 'pry'
   gem 'pry-rails'
   gem 'capybara'
+  gem 'puma'
   gem 'launchy'
 end
 
diff --git a/Gemfile.lock b/Gemfile.lock
index 17a5e57..caa54fb 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -157,6 +157,7 @@ GEM
     pry-rails (0.3.6)
       pry (>= 0.10.4)
     public_suffix (3.0.2)
+    puma (3.11.4)
     rack (2.0.4)
     rack-test (1.0.0)
       rack (>= 1.0, < 3)
@@ -295,6 +296,7 @@ DEPENDENCIES
   omniauth-browserid
   pry
   pry-rails
+  puma
   rails (~> 5.1.5)
   rails-controller-testing
   rails-i18n