diff --git a/.travis.yml b/.travis.yml
index 8c4ccce..78a09bc 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,4 +2,5 @@ sudo: false
 language: ruby
 rvm:
   - "2.1.7"
-  - "2.2.3"
+  - "2.2.4"
+  - "2.3.0"
diff --git a/Gemfile b/Gemfile
index 226de66..d1f6eff 100755
--- a/Gemfile
+++ b/Gemfile
@@ -1,4 +1,3 @@
-ruby '2.1.7'
 source 'https://rubygems.org'
 
 gem 'rake', '~> 10.3'