diff --git a/Rakefile b/Rakefile
index ce390952..c75f5bbc 100644
--- a/Rakefile
+++ b/Rakefile
@@ -100,7 +100,7 @@ if defined?(Gem) and defined?(Gem::PackageTask)
     s.email = "flori@ping.de"
     s.homepage = "http://flori.github.com/#{PKG_NAME}"
     s.license = 'Ruby'
-    s.required_ruby_version = '>= 1.9'
+    s.required_ruby_version = '>= 2.0'
   end
 
   desc 'Creates a json_pure.gemspec file'
diff --git a/json.gemspec b/json.gemspec
index 63693d57..7af20558 100644
Binary files a/json.gemspec and b/json.gemspec differ