diff --git a/.travis.yml b/.travis.yml
index b795351..9d11c98 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -10,6 +10,7 @@ gemfile:
   - gemfiles/activesupport3.2.gemfile
   - gemfiles/activesupport4.0.gemfile
   - gemfiles/activesupport4.1.gemfile
+  - gemfiles/activesupport4.2.gemfile
   - gemfiles/dalli1.1.gemfile
   - gemfiles/dalli2.gemfile
 
diff --git a/gemfiles/activesupport4.2.gemfile b/gemfiles/activesupport4.2.gemfile
new file mode 100644
index 0000000..67154bc
--- /dev/null
+++ b/gemfiles/activesupport4.2.gemfile
@@ -0,0 +1,7 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "activesupport", "~> 4.2.1"
+
+gemspec :path => "../"