diff --git a/.travis.yml b/.travis.yml
index 2342226..ae8e7c6 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,7 +2,6 @@ language: ruby
 cache: bundler
 sudo: false
 gemfile:
-  - Gemfile-rails.3.2.x
   - Gemfile-rails.4.0.x
   - Gemfile-rails.4.1.x
   - Gemfile-rails.4.2.x
@@ -10,9 +9,6 @@ gemfile:
   - Gemfile-rails.5.1.x
   - Gemfile
 rvm:
-  - 1.9.3
-  - 2.0.0
-  - 2.1.10
   - 2.2.10
   - 2.3.7
   - 2.4.3
@@ -20,14 +16,6 @@ rvm:
   - jruby
 matrix:
   exclude:
-    - rvm: 2.2.10
-      gemfile: Gemfile-rails.3.2.x
-    - rvm: 2.3.7
-      gemfile: Gemfile-rails.3.2.x
-    - rvm: 2.4.3
-      gemfile: Gemfile-rails.3.2.x
-    - rvm: 2.5.1
-      gemfile: Gemfile-rails.3.2.x
     - rvm: 2.4.3
       gemfile: Gemfile-rails.4.0.x
     - rvm: 2.5.1
@@ -36,32 +24,10 @@ matrix:
       gemfile: Gemfile-rails.4.1.x
     - rvm: 2.5.1
       gemfile: Gemfile-rails.4.1.x
-    - rvm: 1.9.3
-      gemfile: Gemfile-rails.4.2.x
-    - rvm: 2.0.0
-      gemfile: Gemfile-rails.4.2.x
-    - rvm: 1.9.3
-      gemfile: Gemfile
-    - rvm: 2.0.0
-      gemfile: Gemfile
-    - rvm: 2.1.10
-      gemfile: Gemfile
     - rvm: jruby
       gemfile: Gemfile
-    - rvm: 1.9.3
-      gemfile: Gemfile-rails.5.0.x
-    - rvm: 2.0.0
-      gemfile: Gemfile-rails.5.0.x
-    - rvm: 2.1.10
-      gemfile: Gemfile-rails.5.0.x
     - rvm: jruby
       gemfile: Gemfile-rails.5.0.x
-    - rvm: 1.9.3
-      gemfile: Gemfile-rails.5.1.x
-    - rvm: 2.0.0
-      gemfile: Gemfile-rails.5.1.x
-    - rvm: 2.1.10
-      gemfile: Gemfile-rails.5.1.x
     - rvm: jruby
       gemfile: Gemfile-rails.5.1.x
   allow_failures:
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9b34457..1015b50 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,7 @@
 ## unreleased
 
 * Update I18n dependency to require >= 0.7, allowing to install more recent versions ([@nazarhussain](https://github.com/nazarhussain))
+* Drop support to Rails 3.2 and Ruby 1.9.3/2.0.x/2.1.x
 
 ## v0.2.4 - 2017-08-03
 
diff --git a/Gemfile-rails.3.2.x b/Gemfile-rails.3.2.x
deleted file mode 100644
index f013f62..0000000
--- a/Gemfile-rails.3.2.x
+++ /dev/null
@@ -1,14 +0,0 @@
-source 'https://rubygems.org'
-
-gemspec
-
-gem 'activerecord',  '~> 3.2.0'
-gem 'activesupport', '~> 3.2.0'
-
-platform :jruby do
-  gem 'activerecord-jdbcsqlite3-adapter', '~> 1.2.0'
-end
-
-platform :ruby do
-  gem 'sqlite3', '~> 1.3.8'
-end
diff --git a/i18n_alchemy.gemspec b/i18n_alchemy.gemspec
index 08cb4dd..f9f82d6 100644
--- a/i18n_alchemy.gemspec
+++ b/i18n_alchemy.gemspec
@@ -18,11 +18,11 @@ Gem::Specification.new do |s|
   s.test_files    = Dir["test/**/*"]
   s.require_paths = ["lib"]
 
-  s.add_dependency "activesupport", ">= 3.2.0", "< 5.3.0"
+  s.add_dependency "activesupport", ">= 4.0.0", "< 5.3.0"
   s.add_dependency "i18n", ">= 0.7"
 
-  s.add_development_dependency "actionpack", ">= 3.2.0", "< 5.3.0"
-  s.add_development_dependency "activerecord", ">= 3.2.0", "< 5.3.0"
+  s.add_development_dependency "actionpack", ">= 4.0.0", "< 5.3.0"
+  s.add_development_dependency "activerecord", ">= 4.0.0", "< 5.3.0"
   s.add_development_dependency "minitest", ">= 4.3.2"
   s.add_development_dependency "rake", "~> 10.1"
 end
diff --git a/test/test_helper.rb b/test/test_helper.rb
index e13d0b9..2bf3be8 100644
--- a/test/test_helper.rb
+++ b/test/test_helper.rb
@@ -9,7 +9,7 @@
   Minitest.autorun
   MiniTestCase = Minitest::Test
 rescue LoadError
-  # Rails 4.0/3.2
+  # Rails 4.0
   require 'minitest/unit'
   MiniTest::Unit.autorun
   MiniTestCase = MiniTest::Unit::TestCase