diff --git a/.travis.yml b/.travis.yml
index a2f89d1..96af6e5 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,5 +2,17 @@ rvm:
   - 1.9.3
   - 1.9.2
   - ree
+
+gemfile:
+  - gemfiles/3.2.Gemfile
+  - gemfiles/4.0.Gemfile
+
+matrix:
+  exclude:
+    - rvm: 1.9.2
+      gemfile: gemfiles/4.0.Gemfile
+    - rvm: ree
+      gemfile: gemfiles/4.0.Gemfile
+
 notifications:
   email: false
diff --git a/gemfiles/3.2.Gemfile b/gemfiles/3.2.Gemfile
new file mode 100644
index 0000000..9e620ff
--- /dev/null
+++ b/gemfiles/3.2.Gemfile
@@ -0,0 +1,5 @@
+source "https://rubygems.org"
+
+gem "activemodel", "~> 3.2.14"
+
+gemspec :path=>"../"
diff --git a/gemfiles/4.0.Gemfile b/gemfiles/4.0.Gemfile
new file mode 100644
index 0000000..00e6e32
--- /dev/null
+++ b/gemfiles/4.0.Gemfile
@@ -0,0 +1,5 @@
+source "https://rubygems.org"
+
+gem "activemodel", "~> 4.0.0"
+
+gemspec :path=>"../"