diff --git a/.travis.yml b/.travis.yml
index 4d4472b..81e812d 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,11 +1,7 @@
+language: ruby
 rvm:
-  - 1.8.7
+  - rbx-19mode
+  - ruby-head
   - 1.9.2
   - 1.9.3
-  - jruby-18mode
-  - jruby-19mode
-  - jruby-head
-  - rbx-18mode
-  - rbx-19mode
-  - ree
-  - ruby-head
+  - 2.0.0
diff --git a/execjs.gemspec b/execjs.gemspec
index 8ecabc3..340f568 100644
--- a/execjs.gemspec
+++ b/execjs.gemspec
@@ -14,6 +14,8 @@ Gem::Specification.new do |s|
   s.add_dependency "multi_json", "~>1.0"
   s.add_development_dependency "rake"
 
+  s.required_ruby_version = '>= 1.9.2'
+
   s.authors = ["Sam Stephenson", "Josh Peek"]
   s.email   = ["sstephenson@gmail.com", "josh@joshpeek.com"]
 end