diff --git a/.gitignore b/.gitignore
index 8ca883c..d0f5704 100644
--- a/.gitignore
+++ b/.gitignore
@@ -20,7 +20,6 @@ tmtags
 coverage
 rdoc
 pkg
-Gemfile.lock
 .ruby-version
 
 ## PROJECT::RVM
diff --git a/Gemfile b/Gemfile
index 8690046..b67838e 100644
--- a/Gemfile
+++ b/Gemfile
@@ -5,16 +5,16 @@ group :development do
 
   # ActionView extension
   # ####################
-  gem 'actionview', '~> 4.1.4'
+  gem 'actionview', '>= 4.2.0'
 
   # ActiveSupport extension
   # #######################
-  gem 'activesupport', '~> 4.1.4'
+  gem 'activesupport', '>= 4.2.0'
 
   # ActiveRecord extension
   # ######################
   # * To simplify creating test models we use an in-memory SQLite DB
-  gem 'activerecord', '~> 4.1.4'
+  gem 'activerecord', '>= 4.2.0'
   gem 'sqlite3'
 
   # MongoMapper extension
@@ -25,7 +25,7 @@ group :development do
 
   # Nokogiri extension
   # ##################
-  gem 'nokogiri', '~> 1.6.3.1'
+  gem 'nokogiri', '>= 1.6.5'
 
   # Ripple extension
   # ################
@@ -37,5 +37,5 @@ group :development do
   # Mongoid extension
   # #################
   # * cannot be enabled at the same time as mongo_mapper
-  gem 'mongoid', '~> 4.0.0' 
+  gem 'mongoid', '>= 4.0.0' 
 end
diff --git a/Gemfile.lock b/Gemfile.lock
new file mode 100644
index 0000000..31781b7
--- /dev/null
+++ b/Gemfile.lock
@@ -0,0 +1,91 @@
+PATH
+  remote: .
+  specs:
+    awesome_print (1.2.0)
+
+GEM
+  remote: https://rubygems.org/
+  specs:
+    actionview (4.2.0)
+      activesupport (= 4.2.0)
+      builder (~> 3.1)
+      erubis (~> 2.7.0)
+      rails-dom-testing (~> 1.0, >= 1.0.5)
+      rails-html-sanitizer (~> 1.0, >= 1.0.1)
+    activemodel (4.2.0)
+      activesupport (= 4.2.0)
+      builder (~> 3.1)
+    activerecord (4.2.0)
+      activemodel (= 4.2.0)
+      activesupport (= 4.2.0)
+      arel (~> 6.0)
+    activesupport (4.2.0)
+      i18n (~> 0.7)
+      json (~> 1.7, >= 1.7.7)
+      minitest (~> 5.1)
+      thread_safe (~> 0.3, >= 0.3.4)
+      tzinfo (~> 1.1)
+    arel (6.0.0)
+    bson (2.3.0)
+    builder (3.2.2)
+    connection_pool (2.1.0)
+    diff-lcs (1.2.5)
+    erubis (2.7.0)
+    fakefs (0.5.3)
+    i18n (0.7.0)
+    json (1.8.1)
+    loofah (2.0.1)
+      nokogiri (>= 1.5.9)
+    mini_portile (0.6.1)
+    minitest (5.5.0)
+    mongoid (4.0.0)
+      activemodel (~> 4.0)
+      moped (~> 2.0.0)
+      origin (~> 2.1)
+      tzinfo (>= 0.3.37)
+    moped (2.0.2)
+      bson (~> 2.2)
+      connection_pool (~> 2.0)
+      optionable (~> 0.2.0)
+    nokogiri (1.6.5)
+      mini_portile (~> 0.6.0)
+    optionable (0.2.0)
+    origin (2.1.1)
+    rails-deprecated_sanitizer (1.0.3)
+      activesupport (>= 4.2.0.alpha)
+    rails-dom-testing (1.0.5)
+      activesupport (>= 4.2.0.beta, < 5.0)
+      nokogiri (~> 1.6.0)
+      rails-deprecated_sanitizer (>= 1.0.1)
+    rails-html-sanitizer (1.0.1)
+      loofah (~> 2.0)
+    rspec (3.0.0)
+      rspec-core (~> 3.0.0)
+      rspec-expectations (~> 3.0.0)
+      rspec-mocks (~> 3.0.0)
+    rspec-core (3.0.4)
+      rspec-support (~> 3.0.0)
+    rspec-expectations (3.0.4)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.0.0)
+    rspec-mocks (3.0.4)
+      rspec-support (~> 3.0.0)
+    rspec-support (3.0.4)
+    sqlite3 (1.3.10)
+    thread_safe (0.3.4)
+    tzinfo (1.2.2)
+      thread_safe (~> 0.1)
+
+PLATFORMS
+  ruby
+
+DEPENDENCIES
+  actionview (>= 4.2.0)
+  activerecord (>= 4.2.0)
+  activesupport (>= 4.2.0)
+  awesome_print!
+  fakefs (>= 0.2.1)
+  mongoid (>= 4.0.0)
+  nokogiri (>= 1.6.5)
+  rspec (>= 3.0.0)
+  sqlite3
diff --git a/awesome_print.gemspec b/awesome_print.gemspec
index b061366..f336395 100644
--- a/awesome_print.gemspec
+++ b/awesome_print.gemspec
@@ -25,10 +25,4 @@ Gem::Specification.new do |s|
 
   s.add_development_dependency "rspec",  ">= 3.0.0"
   s.add_development_dependency "fakefs", ">= 0.2.1"
-  s.add_development_dependency "actionview"
-  s.add_development_dependency "activerecord"
-  s.add_development_dependency "activesupport"
-  s.add_development_dependency "mongoid"
-  s.add_development_dependency "mongo_mapper"
-  s.add_development_dependency "nokogiri"
 end
diff --git a/spec/active_record_helper.rb b/spec/active_record_helper.rb
index bf1203f..7a170f5 100644
--- a/spec/active_record_helper.rb
+++ b/spec/active_record_helper.rb
@@ -1,5 +1,12 @@
 require 'active_record'
 
+# Required to use the column support
+module Rails
+  def self.env
+    {}
+  end
+end
+
 # Establish connection to in-memory SQLite DB
 ActiveRecord::Base.establish_connection adapter: "sqlite3", database: ":memory:"