diff --git a/.gemfiles/rails4_2.gemfile b/.gemfiles/rails4_2.gemfile
index e76fa13..6e892ee 100644
--- a/.gemfiles/rails4_2.gemfile
+++ b/.gemfiles/rails4_2.gemfile
@@ -1,5 +1,5 @@
 source 'https://rubygems.org'
 
-gem 'activesupport', '~> 4.1.0'
-gem 'activemodel', '~> 4.1.0'
+gem 'activesupport', '~> 4.2.0'
+gem 'activemodel', '~> 4.2.0'
 gemspec path: '../'
diff --git a/.gemfiles/rails_5_0.gemfile b/.gemfiles/rails_5_0.gemfile
new file mode 100644
index 0000000..086187f
--- /dev/null
+++ b/.gemfiles/rails_5_0.gemfile
@@ -0,0 +1,5 @@
+source 'https://rubygems.org'
+
+gem 'activesupport', '~> 5.0.0'
+gem 'activemodel', '~> 5.0.0'
+gemspec path: '../'
diff --git a/.gemfiles/rails_5_1.gemfile b/.gemfiles/rails_5_1.gemfile
new file mode 100644
index 0000000..9f265ae
--- /dev/null
+++ b/.gemfiles/rails_5_1.gemfile
@@ -0,0 +1,5 @@
+source 'https://rubygems.org'
+
+gem 'activesupport', '~> 5.1.0'
+gem 'activemodel', '~> 5.1.0'
+gemspec path: '../'
diff --git a/.gemfiles/rails_5_2.gemfile b/.gemfiles/rails_5_2.gemfile
new file mode 100644
index 0000000..c73b361
--- /dev/null
+++ b/.gemfiles/rails_5_2.gemfile
@@ -0,0 +1,5 @@
+source 'https://rubygems.org'
+
+gem 'activesupport', '~> 5.2.0'
+gem 'activemodel', '~> 5.2.0'
+gemspec path: '../'
diff --git a/.travis.yml b/.travis.yml
index 3d02775..67bf7dc 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,6 +4,10 @@ rvm:
   - 2.0
   - 2.1
   - 2.2
+  - 2.3
+  - 2.4
+  - 2.5
+  - 2.6
   - jruby
   - rbx
 gemfile:
@@ -11,3 +15,6 @@ gemfile:
   - .gemfiles/rails4_0.gemfile
   - .gemfiles/rails4_1.gemfile
   - .gemfiles/rails4_2.gemfile
+  - .gemfiles/rails5_0.gemfile
+  - .gemfiles/rails5_1.gemfile
+  - .gemfiles/rails5_2.gemfile