diff --git a/.travis.yml b/.travis.yml
index d14eb46..74e4510 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,15 +4,49 @@ language: ruby
 
 os:
   - linux
-  - osx
+  # - osx
 
 rvm:
-  - "2.0.0"
-  - "2.1" # latest 2.1.x
+  - "2.0.0-p0"
+  - "2.0.0-p195"
+  - "2.0.0-p247"
+  - "2.0.0-p353"
+  - "2.0.0-p451"
+  - "2.0.0-p481"
+  - "2.0.0-p576"
+  - "2.0.0-p598"
+  - "2.0.0-p647"
+  - "2.0.0-p648"
+
+  - "2.1.0"
+  - "2.1.1"
+  - "2.1.2"
+  - "2.1.3"
+  - "2.1.4"
+  - "2.1.5"
+  - "2.1.6"
+  - "2.1.7"
+  - "2.1.8"
+  - "2.1.9"
+  - "2.1.10"
+
+  - "2.2.0"
+  - "2.2.1"
+  - "2.2.2"
+  - "2.2.3"
+  - "2.2.4"
   - "2.2.5"
+  - "2.2.6"
+
+  - "2.3.0"
+  - "2.3.1"
+  - "2.3.2"
   - "2.3.3"
+
   - "2.4.0"
+
   - "ruby-head"
+
   - "jruby-9.0.5.0"
   - "jruby-9.1.5.0"
   - "jruby-head"
@@ -37,8 +71,8 @@ matrix:
   # exclude: {}
   # include: {}
 
-  allow_failures:
-    - rvm: 'ruby-head'
+  allow_failures: []
+    # - rvm: 'ruby-head'
 
   # return results as soon as mandatory versions are done
   fast_finish: true