diff --git a/.travis.yml b/.travis.yml
index 01db879..c006203 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -8,6 +8,7 @@ rvm:
   - 2.2.6
   - 2.3.3
   - 2.4.1
+  - ruby-head
   - jruby-19mode
   - jruby-9.1.8.0
 git:
@@ -27,3 +28,5 @@ matrix:
     - rvm: 2.4.1
       gemfile: gemfiles/alaska
       env: ALASKA=1
+    - rvm: ruby-head
+  fast_finish: true