diff --git a/Gemfile b/Gemfile
index b9791555..a2121d50 100644
--- a/Gemfile
+++ b/Gemfile
@@ -12,7 +12,7 @@ gem 'sinatra-contrib', require: nil #github: 'sinatra/sinatra-contrib', require:
 # 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 'puma'
+gem 'unicorn'
 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 db742902..18225844 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -17,11 +17,11 @@ GIT
 
 GIT
   remote: git://github.com/rkh/gh.git
-  revision: 5e781e424e346838604563bd6408c4419f5480b0
+  revision: e8d34e81640260441a2103f9d5395b2dbbe60258
   specs:
-    gh (0.9.1)
+    gh (0.9.2)
       addressable
-      backports (~> 2.3)
+      backports
       faraday (~> 0.8)
       multi_json (~> 1.0)
       net-http-persistent (>= 2.7)
@@ -45,7 +45,7 @@ GIT
 
 GIT
   remote: git://github.com/travis-ci/travis-core.git
-  revision: c5ceac066aeea4a5b3d84e66a165b8c188f13c9f
+  revision: 5fe14c24a41e249e53a365e0894c56ce74ed861c
   specs:
     travis-core (0.0.1)
       actionmailer (~> 3.2.12)
@@ -127,7 +127,7 @@ GEM
     activesupport (3.2.13)
       i18n (= 0.6.1)
       multi_json (~> 1.0)
-    addressable (2.3.3)
+    addressable (2.3.4)
     arel (3.0.2)
     atomic (1.1.7)
     avl_tree (1.1.3)
@@ -165,6 +165,7 @@ GEM
     i18n (0.6.1)
     journey (1.0.4)
     json (1.7.7)
+    kgio (2.8.0)
     listen (0.7.2)
     mail (2.5.3)
       i18n (>= 0.4.0)
@@ -189,8 +190,6 @@ GEM
       coderay (~> 1.0.5)
       method_source (~> 0.8)
       slop (~> 3.4)
-    puma (1.6.3)
-      rack (~> 1.2)
     pusher (0.11.3)
       multi_json (~> 1.0)
       signature (~> 0.1.6)
@@ -210,6 +209,7 @@ GEM
       rake (>= 0.8.7)
       rdoc (~> 3.4)
       thor (>= 0.14.6, < 2.0)
+    raindrops (0.10.0)
     rake (0.9.6)
     rb-fsevent (0.9.3)
     rdoc (3.12.2)
@@ -264,6 +264,10 @@ GEM
       polyglot
       polyglot (>= 0.3.1)
     tzinfo (0.3.37)
+    unicorn (4.6.2)
+      kgio (~> 2.6)
+      rack
+      raindrops (~> 0.7)
     uuidtools (2.1.3)
     yajl-ruby (1.1.0)
     yard (0.8.4.1)
@@ -282,7 +286,6 @@ DEPENDENCIES
   micro_migrations!
   mocha (~> 0.12)
   pry
-  puma
   rack-cache (~> 1.2)
   rack-contrib!
   rake (~> 0.9.2)
@@ -297,4 +300,5 @@ DEPENDENCIES
   travis-core!
   travis-sidekiqs!
   travis-support!
+  unicorn
   yard-sinatra!
diff --git a/script/server b/script/server
index a17c4245..29326751 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 puma config.ru -p $PORT -e $RACK_ENV --threads 0:16"
-[[ $RACK_ENV == "development" ]] && exec rerun "$cmd -b tcp://127.0.0.1:$PORT"
+cmd="ruby -I lib -S bundle exec ruby -I lib -S unicorn config.ru -p $PORT -E $RACK_ENV"
+[[ $RACK_ENV == "development" ]] && exec rerun "$cmd -l 127.0.0.1:$PORT"
 exec $cmd