diff --git a/.gitignore b/.gitignore
index 1800886..4e83207 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,3 +3,5 @@ bin/*
 pkg
 .idea
 Gemfile.lock
+/Gemfile_activesupport_4.lock
+/Gemfile_activesupport_5.lock
diff --git a/.travis.yml b/.travis.yml
index 14984de..13c835e 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,6 +1,12 @@
 language: ruby
+
 rvm:
   - 2.2.5
   - 2.3.1
   - jruby
   - rbx
+
+gemfile:
+  - Gemfile
+  - Gemfile_activesupport_4
+  - Gemfile_activesupport_5
diff --git a/Gemfile_activesupport_4 b/Gemfile_activesupport_4
new file mode 100644
index 0000000..5ce51f5
--- /dev/null
+++ b/Gemfile_activesupport_4
@@ -0,0 +1,5 @@
+source "http://rubygems.org"
+
+gemspec
+
+gem 'activesupport', '~> 4'
diff --git a/Gemfile_activesupport_5 b/Gemfile_activesupport_5
new file mode 100644
index 0000000..96cf3e0
--- /dev/null
+++ b/Gemfile_activesupport_5
@@ -0,0 +1,5 @@
+source "http://rubygems.org"
+
+gemspec
+
+gem 'activesupport', '~> 5'