diff --git a/.travis.yml b/.travis.yml
index 314d72a..7e3b563 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,10 +1,9 @@
 language: ruby
 rvm:
-  -  2.0.0
-  -  2.1.0
-  -  jruby
-matrix:
-  allow_failures:
-    - rvm: jruby
+  -  2.1.10
+  -  2.2.6
+  -  2.3.3
+#  -  2.4.0 # wait for json > 1.8.3 or Rails 2.8
+  -  jruby-9.1.5.0
 script: "bundle exec rspec spec"