diff --git a/.gitignore b/.gitignore
index e09d792f..28364b07 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
 config/travis.yml
 .yardoc
+log/
diff --git a/Gemfile b/Gemfile
index c0555e45..a66a06a7 100644
--- a/Gemfile
+++ b/Gemfile
@@ -12,7 +12,7 @@ gem 'sinatra-contrib', github: 'sinatra/sinatra-contrib', require: nil
 # TODO need to release the gem as soon i'm certain this change makes sense
 gem 'simple_states',      github: 'svenfuchs/simple_states', branch: 'sf-set-state-early'
 
-gem 'unicorn'
+gem 'puma'
 gem "sentry-raven",    github: 'getsentry/raven-ruby'
 gem 'yard-sinatra',    github: 'rkh/yard-sinatra'
 gem 'rack-contrib',    github: 'rack/rack-contrib'
diff --git a/Gemfile.lock b/Gemfile.lock
index f575aaf8..fcd4e7af 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -112,7 +112,7 @@ PATH
     travis-api (0.0.1)
       backports (~> 2.5)
       hubble (~> 0.1)
-      newrelic_rpm (~> 3.3.0)
+      newrelic_rpm (~> 3.5.0)
       pg (~> 0.13.2)
       rack-contrib (~> 1.1)
       rack-ssl (~> 1.3)
@@ -188,7 +188,6 @@ GEM
     i18n (0.6.1)
     journey (1.0.4)
     json (1.7.6)
-    kgio (2.8.0)
     listen (0.7.2)
     mail (2.4.4)
       i18n (>= 0.4.0)
@@ -207,7 +206,7 @@ GEM
     multipart-post (1.1.5)
     net-http-persistent (2.8)
     net-http-pipeline (1.0.1)
-    newrelic_rpm (3.3.5)
+    newrelic_rpm (3.5.5.38)
     pg (0.13.2)
     polyglot (0.3.3)
     postmark (0.9.18)
@@ -221,6 +220,8 @@ GEM
       coderay (~> 1.0.5)
       method_source (~> 0.8)
       slop (~> 3.4)
+    puma (1.6.3)
+      rack (~> 1.2)
     pusher (0.11.2)
       multi_json (~> 1.0)
       signature (~> 0.1.6)
@@ -240,7 +241,6 @@ GEM
       rake (>= 0.8.7)
       rdoc (~> 3.4)
       thor (>= 0.14.6, < 2.0)
-    raindrops (0.10.0)
     rake (0.9.2.2)
     rdoc (3.12)
       json (~> 1.4)
@@ -283,10 +283,6 @@ GEM
       polyglot
       polyglot (>= 0.3.1)
     tzinfo (0.3.35)
-    unicorn (4.5.0)
-      kgio (~> 2.6)
-      rack
-      raindrops (~> 0.7)
     uuidtools (2.1.3)
     yajl-ruby (1.1.0)
     yard (0.8.3)
@@ -305,6 +301,7 @@ DEPENDENCIES
   micro_migrations!
   mocha (~> 0.12)
   pry
+  puma
   rack-cache (~> 1.2)
   rack-contrib!
   rake (~> 0.9.2)
@@ -318,5 +315,4 @@ DEPENDENCIES
   travis-core!
   travis-sidekiqs!
   travis-support!
-  unicorn
   yard-sinatra!
diff --git a/config.ru b/config.ru
index 8dfdfca6..a570b9e2 100644
--- a/config.ru
+++ b/config.ru
@@ -5,4 +5,12 @@ ENV['RAILS_ENV']  = ENV['RACK_ENV']
 $stdout.sync = true
 
 require 'travis/api/app'
+require 'core_ext/module/load_constants'
+
+models = Travis::Model.constants.map(&:to_s)
+only = [/^(ActiveRecord|ActiveModel|Travis|GH|#{models.join('|')})/]
+[Travis::Api, Travis, GH].each do |target|
+  target.load_constants! :only => only, :skip => ['Travis::Memory', 'GH::ResponseWrapper'], :debug => false
+end
+
 run Travis::Api::App.new
diff --git a/script/server b/script/server
index cf218d5f..a17c4245 100755
--- a/script/server
+++ b/script/server
@@ -3,6 +3,6 @@ cd "$(dirname "$0")/.."
 [ $PORT ]     || PORT=3000
 [ $RACK_ENV ] || RACK_ENV=development
 
-cmd="ruby -I lib -S bundle exec ruby -I lib -S unicorn config.ru -c config/unicorn.rb -p $PORT -E $RACK_ENV"
-[[ $RACK_ENV == "development" ]] && exec rerun "$cmd -l 127.0.0.1:$PORT"
+cmd="ruby -I lib -S bundle exec ruby -I lib -S puma config.ru -p $PORT -e $RACK_ENV --threads 0:16"
+[[ $RACK_ENV == "development" ]] && exec rerun "$cmd -b tcp://127.0.0.1:$PORT"
 exec $cmd
diff --git a/travis-api.gemspec b/travis-api.gemspec
index eb1e3b51..38449832 100644
--- a/travis-api.gemspec
+++ b/travis-api.gemspec
@@ -166,7 +166,7 @@ Gem::Specification.new do |s|
   s.add_dependency 'hubble',          '~> 0.1'
   s.add_dependency 'backports',       '~> 2.5'
   s.add_dependency 'pg',              '~> 0.13.2'
-  s.add_dependency 'newrelic_rpm',    '~> 3.3.0'
+  s.add_dependency 'newrelic_rpm',    '~> 3.5.0'
   s.add_dependency 'thin',            '~> 1.4'
   s.add_dependency 'sinatra',         '~> 1.3'
   s.add_dependency 'sinatra-contrib', '~> 1.3'