diff --git a/Gemfile.lock b/Gemfile.lock
index 81812a3..01d0e5b 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -3,99 +3,92 @@ PATH
   specs:
     i18n-timezones (1.2.3)
       i18n (~> 0.5)
-      rails (>= 3.0.0)
+      rails (>= 4.0.0)
 
 GEM
   remote: http://rubygems.org/
   specs:
-    actionmailer (3.2.2)
-      actionpack (= 3.2.2)
-      mail (~> 2.4.0)
-    actionpack (3.2.2)
-      activemodel (= 3.2.2)
-      activesupport (= 3.2.2)
-      builder (~> 3.0.0)
+    actionmailer (4.0.0)
+      actionpack (= 4.0.0)
+      mail (~> 2.5.3)
+    actionpack (4.0.0)
+      activesupport (= 4.0.0)
+      builder (~> 3.1.0)
       erubis (~> 2.7.0)
-      journey (~> 1.0.1)
-      rack (~> 1.4.0)
-      rack-cache (~> 1.1)
-      rack-test (~> 0.6.1)
-      sprockets (~> 2.1.2)
-    activemodel (3.2.2)
-      activesupport (= 3.2.2)
-      builder (~> 3.0.0)
-    activerecord (3.2.2)
-      activemodel (= 3.2.2)
-      activesupport (= 3.2.2)
-      arel (~> 3.0.2)
-      tzinfo (~> 0.3.29)
-    activeresource (3.2.2)
-      activemodel (= 3.2.2)
-      activesupport (= 3.2.2)
-    activesupport (3.2.2)
-      i18n (~> 0.6)
-      multi_json (~> 1.0)
-    arel (3.0.2)
-    builder (3.0.0)
-    diff-lcs (1.1.3)
+      rack (~> 1.5.2)
+      rack-test (~> 0.6.2)
+    activemodel (4.0.0)
+      activesupport (= 4.0.0)
+      builder (~> 3.1.0)
+    activerecord (4.0.0)
+      activemodel (= 4.0.0)
+      activerecord-deprecated_finders (~> 1.0.2)
+      activesupport (= 4.0.0)
+      arel (~> 4.0.0)
+    activerecord-deprecated_finders (1.0.3)
+    activesupport (4.0.0)
+      i18n (~> 0.6, >= 0.6.4)
+      minitest (~> 4.2)
+      multi_json (~> 1.3)
+      thread_safe (~> 0.1)
+      tzinfo (~> 0.3.37)
+    arel (4.0.0)
+    atomic (1.1.13)
+    builder (3.1.4)
+    diff-lcs (1.2.4)
     erubis (2.7.0)
-    hike (1.2.1)
-    i18n (0.6.0)
+    hike (1.2.3)
+    i18n (0.6.5)
     i18n-spec (0.1.2)
-    journey (1.0.3)
-    json (1.6.5)
-    mail (2.4.4)
-      i18n (>= 0.4.0)
+    mail (2.5.4)
       mime-types (~> 1.16)
       treetop (~> 1.4.8)
     mime-types (1.25)
-    multi_json (1.1.0)
+    minitest (4.7.5)
+    multi_json (1.7.9)
     polyglot (0.3.3)
-    rack (1.4.1)
-    rack-cache (1.2)
-      rack (>= 0.4)
-    rack-ssl (1.3.2)
-      rack
-    rack-test (0.6.1)
+    rack (1.5.2)
+    rack-test (0.6.2)
       rack (>= 1.0)
-    rails (3.2.2)
-      actionmailer (= 3.2.2)
-      actionpack (= 3.2.2)
-      activerecord (= 3.2.2)
-      activeresource (= 3.2.2)
-      activesupport (= 3.2.2)
-      bundler (~> 1.0)
-      railties (= 3.2.2)
-    railties (3.2.2)
-      actionpack (= 3.2.2)
-      activesupport (= 3.2.2)
-      rack-ssl (~> 1.3.2)
+    rails (4.0.0)
+      actionmailer (= 4.0.0)
+      actionpack (= 4.0.0)
+      activerecord (= 4.0.0)
+      activesupport (= 4.0.0)
+      bundler (>= 1.3.0, < 2.0)
+      railties (= 4.0.0)
+      sprockets-rails (~> 2.0.0)
+    railties (4.0.0)
+      actionpack (= 4.0.0)
+      activesupport (= 4.0.0)
       rake (>= 0.8.7)
-      rdoc (~> 3.4)
-      thor (~> 0.14.6)
-    rake (0.9.2.2)
-    rdoc (3.12)
-      json (~> 1.4)
-    rspec (2.9.0)
-      rspec-core (~> 2.9.0)
-      rspec-expectations (~> 2.9.0)
-      rspec-mocks (~> 2.9.0)
-    rspec-core (2.9.0)
-    rspec-expectations (2.9.0)
-      diff-lcs (~> 1.1.3)
-    rspec-mocks (2.9.0)
-    rspec-rails (2.9.0)
+      thor (>= 0.18.1, < 2.0)
+    rake (10.1.0)
+    rspec-core (2.14.2)
+    rspec-expectations (2.14.0)
+      diff-lcs (>= 1.1.3, < 2.0)
+    rspec-mocks (2.14.1)
+    rspec-rails (2.14.0)
       actionpack (>= 3.0)
       activesupport (>= 3.0)
       railties (>= 3.0)
-      rspec (~> 2.9.0)
+      rspec-core (~> 2.14.0)
+      rspec-expectations (~> 2.14.0)
+      rspec-mocks (~> 2.14.0)
     spork (1.0.0rc2)
-    sprockets (2.1.2)
+    sprockets (2.10.0)
       hike (~> 1.2)
+      multi_json (~> 1.0)
       rack (~> 1.0)
       tilt (~> 1.1, != 1.3.0)
-    thor (0.14.6)
-    tilt (1.3.3)
+    sprockets-rails (2.0.0)
+      actionpack (>= 3.0)
+      activesupport (>= 3.0)
+      sprockets (~> 2.8)
+    thor (0.18.1)
+    thread_safe (0.1.2)
+      atomic
+    tilt (1.4.1)
     treetop (1.4.15)
       polyglot
       polyglot (>= 0.3.1)
@@ -107,5 +100,5 @@ PLATFORMS
 DEPENDENCIES
   i18n-spec (>= 0.1.1)
   i18n-timezones!
-  rspec-rails (>= 2.7.0)
+  rspec-rails (>= 2.14.0)
   spork (~> 1.0rc)
diff --git a/README.rdoc b/README.rdoc
index d7b8cd8..d3ca7d7 100644
--- a/README.rdoc
+++ b/README.rdoc
@@ -39,6 +39,7 @@ If you find an error in a translation, please let us know. Please help us fill i
 * Steve Hodges - https://github.com/stevehodges
 
 == Version History
+* 1.3 - Upgrading to Rails 4
 * 1.2.3 - Adding Arabic, Italian, Dutch, Portuguese, and Chinese (Traditional) locales
 * 1.2.2 - Adding Japansese locale
 * 1.2.1 - Fixing a German translation
diff --git a/i18n-timezones.gemspec b/i18n-timezones.gemspec
index c0c6d50..cc45694 100644
--- a/i18n-timezones.gemspec
+++ b/i18n-timezones.gemspec
@@ -20,8 +20,8 @@ Gem::Specification.new do |s|
   s.platform     = Gem::Platform::RUBY
 
   s.add_dependency('i18n', '~> 0.5')
-  s.add_dependency "rails", ">= 3.0.0"
-  s.add_development_dependency "rspec-rails", ">= 2.7.0"
+  s.add_dependency "rails", ">= 4.0.0"
+  s.add_development_dependency "rspec-rails", ">= 2.14.0"
   s.add_development_dependency "i18n-spec", ">= 0.1.1"
   s.add_development_dependency "spork", "~> 1.0rc"
 end
diff --git a/lib/i18n_timezones/version.rb b/lib/i18n_timezones/version.rb
index cd87ce7..729fb37 100644
--- a/lib/i18n_timezones/version.rb
+++ b/lib/i18n_timezones/version.rb
@@ -1,3 +1,3 @@
 module I18nTimezones
-  VERSION = "1.2.3"
+  VERSION = "1.3"
 end
diff --git a/rails/locale/ar.yml b/rails/locale/ar.yml
index 1f89c9e..25480c4 100644
--- a/rails/locale/ar.yml
+++ b/rails/locale/ar.yml
@@ -144,3 +144,6 @@ ar:
     "Nuku'alofa": "نوكوالوفا" # +13:00
     "Samoa": "ساموا" # +13:00
     "Tokelau Is.": "توكيلاو" # +14:00
+    "Montevideo": "مونتيفيديو"
+    "Ulaanbaatar": "أولان باتور"
+    "Chatham Is.": "هل تشاتام"
diff --git a/rails/locale/de.yml b/rails/locale/de.yml
index a7cab08..38ced71 100644
--- a/rails/locale/de.yml
+++ b/rails/locale/de.yml
@@ -143,4 +143,7 @@ de:
     "Wellington": "Wellington" # +12:00
     "Nuku'alofa": "Nuku'alofa" # +13:00
     "Samoa": "Samoa" # +13:00
-    "Tokelau Is.": "Tokelau" # +14:00
\ No newline at end of file
+    "Tokelau Is.": "Tokelau" # +14:00
+    "Montevideo": "Montevideo"
+    "Ulaanbaatar": "Ulaanbaatar"
+    "Chatham Is.": "Chatham Inseln"
diff --git a/rails/locale/es.yml b/rails/locale/es.yml
index f65605d..19e7fed 100644
--- a/rails/locale/es.yml
+++ b/rails/locale/es.yml
@@ -142,4 +142,9 @@ es:
     "Auckland": "Auckland"
     "Wellington": "Wellington"
     "Nuku'alofa": "Nuku'alofa"
-    "Kyiv": "Kiev"
\ No newline at end of file
+    "Kyiv": "Kiev"
+    "American Samoa": "Samoa Americana"
+    "Montevideo": "Montevideo"
+    "Ulaanbaatar": "Ulaanbaatar"
+    "Chatham Is.": "Isla Chatham"
+    "Tokelau Is.": "Isla de Tokelau"
diff --git a/rails/locale/fr.yml b/rails/locale/fr.yml
index c797830..eafafdf 100644
--- a/rails/locale/fr.yml
+++ b/rails/locale/fr.yml
@@ -143,4 +143,8 @@ fr:
     "Wellington": "Wellington" # +12:00
     "Nuku'alofa": "Nuku'alofa" # +13:00
     "Samoa": "Samoa" # +13:00
-    "Tokelau Is.": "Tokelau" # +14:00
\ No newline at end of file
+    "Tokelau Is.": "Tokelau" # +14:00
+    "Montevideo": "Montevideo"
+    "Ulaanbaatar": "Oulan-Bator"
+    "Chatham Is.": "Îles Chatham"
+    
\ No newline at end of file
diff --git a/rails/locale/it.yml b/rails/locale/it.yml
index 735faa1..d81d4d3 100644
--- a/rails/locale/it.yml
+++ b/rails/locale/it.yml
@@ -144,3 +144,6 @@ it:
     "Nuku'alofa": "Nuku'alofa"
     "Samoa": "Samoa"
     "Tokelau Is.": "Isole Tokelau"
+    "Montevideo": "Montevideo"
+    "Ulaanbaatar": "Ulaanbaatar"
+    "Chatham Is.": "Isole Chatham"
diff --git a/rails/locale/ja.yml b/rails/locale/ja.yml
index a2620f5..29575d4 100644
--- a/rails/locale/ja.yml
+++ b/rails/locale/ja.yml
@@ -144,3 +144,6 @@ ja:
     "Wellington": "ウェリントン"
     "Nuku'alofa": "ヌクアロファ"
     "Tokelau Is.": "トケラウ諸島"
+    "Montevideo": "モンテビデオ"
+    "Ulaanbaatar": "ウランバートル"
+    "Chatham Is.": "チャタム島"
diff --git a/rails/locale/ko.yml b/rails/locale/ko.yml
index 94cd424..3152c2f 100644
--- a/rails/locale/ko.yml
+++ b/rails/locale/ko.yml
@@ -144,3 +144,6 @@ ko:
     "Wellington": "웰링턴"
     "Nuku'alofa": "누쿠알로파"
     "Tokelau Is.": "토켈라우 제도"
+    "Montevideo": "몬테비데오"
+    "Ulaanbaatar": "울란바토르"
+    "Chatham Is.": "채텀 아일랜드"
diff --git a/rails/locale/nl.yml b/rails/locale/nl.yml
index 89fca0c..3ad894b 100644
--- a/rails/locale/nl.yml
+++ b/rails/locale/nl.yml
@@ -144,3 +144,6 @@ nl:
     "Nuku'alofa": "Nuku'alofa"
     "Samoa": "Samoa"
     "Tokelau Is.": "Tokelau Eilanden"
+    "Montevideo": "Montevideo"
+    "Ulaanbaatar": "Ulaanbaatar"
+    "Chatham Is.": "Chatham Eilanden"
diff --git a/rails/locale/pt.yml b/rails/locale/pt.yml
index f5b4256..2f66948 100644
--- a/rails/locale/pt.yml
+++ b/rails/locale/pt.yml
@@ -144,3 +144,6 @@ pt:
     "Nuku'alofa": "Nuku'alofa"
     "Samoa": "Samoa"
     "Tokelau Is.": "Ilha Tokelau"
+    "Montevideo": "Montevidéu"
+    "Ulaanbaatar": "Ulaanbaatar"
+    "Chatham Is.": "Ilha Chatham"
diff --git a/rails/locale/ru.yml b/rails/locale/ru.yml
index 9448f13..9c3d21c 100644
--- a/rails/locale/ru.yml
+++ b/rails/locale/ru.yml
@@ -143,4 +143,7 @@ ru:
     "Wellington": "Веллингтон" # +12:00
     "Nuku'alofa": "Нукуалофа" # +13:00
     "Samoa": "Самоа" # +13:00
-    "Tokelau Is.": "Токелау" # +14:00
\ No newline at end of file
+    "Tokelau Is.": "Токелау" # +14:00
+    "Montevideo": "Монтевидео"
+    "Ulaanbaatar": "Улан-Батор"
+    "Chatham Is.": "Остров Чатем"
diff --git a/rails/locale/zh-TW.yml b/rails/locale/zh-TW.yml
index 087d3b3..ff7d4c7 100644
--- a/rails/locale/zh-TW.yml
+++ b/rails/locale/zh-TW.yml
@@ -144,3 +144,6 @@ zh-TW:
     "Nuku'alofa": "努瓜婁發"
     "Samoa": "薩摩亞"
     "Tokelau Is.": "托克勞群島"
+    "Montevideo": "蒙得維的亞"
+    "Ulaanbaatar": "烏蘭巴托"
+    "Chatham Is.": "查塔姆"
\ No newline at end of file
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index a2cfa9a..c396b31 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -1,6 +1,6 @@
 ENV["RAILS_ENV"] = "test"
 
-require 'rspec'
+#require 'rspec/rails'
 require 'i18n-spec'
 require 'i18n/core_ext/hash'
 require 'active_support'
@@ -12,7 +12,7 @@
   config.fail_fast = true
 end
 
-module Config
+module RbConfig
   class Application < ::Rails::Application
     # configuration here if needed
     config.active_support.deprecation = :stderr
@@ -20,4 +20,4 @@ class Application < ::Rails::Application
 end
  
 # Initialize the application
-Config::Application.initialize!
+RbConfig::Application.initialize!
diff --git a/spec/unit/translations_spec.rb b/spec/unit/translations_spec.rb
index 8ea16cd..ade97bf 100644
--- a/spec/unit/translations_spec.rb
+++ b/spec/unit/translations_spec.rb
@@ -6,7 +6,6 @@
     I18n.locale = locale_file.split('/').last.split('.').first
     ActiveSupport::TimeZone.all.each do |zone|
       p I18n.t(zone.name, :scope => :timezones, :separator => "\001") if I18n.t(zone.name, :scope => :timezones, :separator => "\001").include?('translation missing')
-        
       it { I18n.t(zone.name, :scope => :timezones, :separator => "\001").should_not == zone }
       it { I18n.t(zone.name, :scope => :timezones, :separator => "\001").include?('translation missing').should == false }
     end