diff --git a/.travis.yml b/.travis.yml
index ba48a76..9e25f6a 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -27,6 +27,14 @@ matrix:
       gemfile: gemfiles/Gemfile.rails-4.0
     - rvm: 2.3.1
       gemfile: gemfiles/Gemfile.rails-4.2
+    - rvm: 2.3.1
+      gemfile: gemfiles/Gemfile.rails-5.1
+    - rvm: 2.4.0-preview2
+      gemfile: gemfiles/Gemfile.rails-4.0
+    - rvm: 2.4.0-preview2
+      gemfile: gemfiles/Gemfile.rails-4.2
+    - rvm: 2.4.0-preview2
+      gemfile: gemfiles/Gemfile.rails-5.1
 
   fast_finish: true
   allow_failures:
@@ -39,7 +47,7 @@ matrix:
     - rvm: 2.3.1
       gemfile: gemfiles/Gemfile.rails-3.0
     - rvm: 2.3.1
-      gemfile: gemfiles/Gemfile.rails-5.0
+      gemfile: gemfiles/Gemfile.rails-5.1
     - rvm: 2.4.0-preview2
-      gemfile: gemfiles/Gemfile.rails-5.0
+      gemfile: gemfiles/Gemfile.rails-5.1