diff --git a/.gitignore b/.gitignore
index 0cb6eeb..e13d292 100644
--- a/.gitignore
+++ b/.gitignore
@@ -7,3 +7,4 @@
 /pkg/
 /spec/reports/
 /tmp/
+*.gemfile.lock
diff --git a/.travis.yml b/.travis.yml
index c37f0ec..d92db18 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,4 +1,18 @@
 language: ruby
 rvm:
+  - 1.9.3
+  - 2.0.0
+  - 2.1.0
   - 2.2.2
-before_install: gem install bundler -v 1.10.4
+before_install:
+  - gem update --system
+install: "bundle install"
+gemfile:
+  - gemfiles/activemodel_3.0.gemfile
+  - gemfiles/activemodel_3.1.gemfile
+  - gemfiles/activemodel_3.2.gemfile
+  - gemfiles/activemodel_4.0.gemfile
+  - gemfiles/activemodel_4.1.gemfile
+  - gemfiles/activemodel_4.2.gemfile
+sudo: false
+cache: bundler
diff --git a/Appraisals b/Appraisals
new file mode 100644
index 0000000..1a9c802
--- /dev/null
+++ b/Appraisals
@@ -0,0 +1,23 @@
+appraise "activemodel-4.2" do
+  gem "activemodel", "~> 4.2.0"
+end
+
+appraise "activemodel-4.1" do
+  gem "activemodel", "~> 4.1.0"
+end
+
+appraise "activemodel-4.0" do
+  gem "activemodel", "~> 4.0.0"
+end
+
+appraise "activemodel-3.2" do
+  gem "activemodel", "~> 3.2.0"
+end
+
+appraise "activemodel-3.1" do
+  gem "activemodel", "~> 3.1.0"
+end
+
+appraise "activemodel-3.0" do
+  gem "activemodel", "~> 3.0.0"
+end
diff --git a/Gemfile b/Gemfile
index c7964bc..fa75df1 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,4 +1,3 @@
 source 'https://rubygems.org'
 
 gemspec
-gem "activemodel", "~> 4.1.0"
diff --git a/Rakefile b/Rakefile
index b7e9ed5..67bb6ce 100644
--- a/Rakefile
+++ b/Rakefile
@@ -1,6 +1,10 @@
-require "bundler/gem_tasks"
+require "rubygems"
+require "bundler"
+require 'rake'
+require 'appraisal'
 require "rspec/core/rake_task"
 
+Bundler::GemHelper.install_tasks
 RSpec::Core::RakeTask.new(:spec)
 
 task :default => :spec
diff --git a/active_model_warnings.gemspec b/active_model_warnings.gemspec
index ac9f12c..16f0381 100644
--- a/active_model_warnings.gemspec
+++ b/active_model_warnings.gemspec
@@ -11,7 +11,7 @@ Gem::Specification.new do |spec|
 
   spec.summary       = %q{Compliant validtions for ActiveModel.}
   spec.description   = %q{This is useful when you want to define optional validations for a resource and keep it valid.}
-  spec.homepage      = "https://github.com/babasbot/active_model_validations."
+  spec.homepage      = "https://github.com/babasbot/active_model_validations"
   spec.license       = "MIT"
 
   spec.files         = `git ls-files -z`.split("\x0").reject { |f| f.match(%r{^(test|spec|features)/}) }
@@ -19,10 +19,9 @@ Gem::Specification.new do |spec|
   spec.executables   = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }
   spec.require_paths = ["lib"]
 
-  spec.add_development_dependency "bundler", "~> 1.10"
-  spec.add_development_dependency "rake",    "~> 10.0"
+  spec.add_dependency("activemodel", ">= 3.0.0")
+
   spec.add_development_dependency "rspec"
   spec.add_development_dependency "coveralls"
-
-  spec.add_runtime_dependency "activemodel",   "~> 4.1.0"
+  spec.add_development_dependency 'appraisal'
 end
diff --git a/gemfiles/activemodel_3.0.gemfile b/gemfiles/activemodel_3.0.gemfile
new file mode 100644
index 0000000..7c2e7cb
--- /dev/null
+++ b/gemfiles/activemodel_3.0.gemfile
@@ -0,0 +1,7 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "activemodel", "~> 3.0.0"
+
+gemspec :path => "../"
diff --git a/gemfiles/activemodel_3.1.gemfile b/gemfiles/activemodel_3.1.gemfile
new file mode 100644
index 0000000..27c7ef8
--- /dev/null
+++ b/gemfiles/activemodel_3.1.gemfile
@@ -0,0 +1,7 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "activemodel", "~> 3.1.0"
+
+gemspec :path => "../"
diff --git a/gemfiles/activemodel_3.2.gemfile b/gemfiles/activemodel_3.2.gemfile
new file mode 100644
index 0000000..ea3a4f4
--- /dev/null
+++ b/gemfiles/activemodel_3.2.gemfile
@@ -0,0 +1,7 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "activemodel", "~> 3.2.0"
+
+gemspec :path => "../"
diff --git a/gemfiles/activemodel_4.0.gemfile b/gemfiles/activemodel_4.0.gemfile
new file mode 100644
index 0000000..369829d
--- /dev/null
+++ b/gemfiles/activemodel_4.0.gemfile
@@ -0,0 +1,7 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "activemodel", "~> 4.0.0"
+
+gemspec :path => "../"
diff --git a/gemfiles/activemodel_4.1.gemfile b/gemfiles/activemodel_4.1.gemfile
new file mode 100644
index 0000000..826bb51
--- /dev/null
+++ b/gemfiles/activemodel_4.1.gemfile
@@ -0,0 +1,7 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "activemodel", "~> 4.1.0"
+
+gemspec :path => "../"
diff --git a/gemfiles/activemodel_4.2.gemfile b/gemfiles/activemodel_4.2.gemfile
new file mode 100644
index 0000000..1d45c34
--- /dev/null
+++ b/gemfiles/activemodel_4.2.gemfile
@@ -0,0 +1,7 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "activemodel", "~> 4.2.0"
+
+gemspec :path => "../"
diff --git a/lib/active_model_warnings/version.rb b/lib/active_model_warnings/version.rb
index 4affdb6..78b1528 100644
--- a/lib/active_model_warnings/version.rb
+++ b/lib/active_model_warnings/version.rb
@@ -1,3 +1,3 @@
 module ActiveModelWarnings
-  VERSION = "0.1.0"
+  VERSION = "0.1.1"
 end