diff --git a/VERSION b/VERSION
index ccbccc3d..276cbf9e 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-2.2.0
+2.3.0
diff --git a/json.gemspec b/json.gemspec
index 51dd8f02..c3469186 100644
Binary files a/json.gemspec and b/json.gemspec differ
diff --git a/json_pure.gemspec b/json_pure.gemspec
index c0f1c51a..068deeb6 100644
--- a/json_pure.gemspec
+++ b/json_pure.gemspec
@@ -1,14 +1,14 @@
 # -*- encoding: utf-8 -*-
-# stub: json_pure 2.2.0 ruby lib
+# stub: json_pure 2.3.0 ruby lib
 
 Gem::Specification.new do |s|
   s.name = "json_pure".freeze
-  s.version = "2.2.0"
+  s.version = "2.3.0"
 
   s.required_rubygems_version = Gem::Requirement.new(">= 0".freeze) if s.respond_to? :required_rubygems_version=
   s.require_paths = ["lib".freeze]
   s.authors = ["Florian Frank".freeze]
-  s.date = "2019-07-13"
+  s.date = "2019-12-09"
   s.description = "This is a JSON implementation in pure Ruby.".freeze
   s.email = "flori@ping.de".freeze
   s.extra_rdoc_files = ["README.md".freeze]
@@ -17,17 +17,20 @@ Gem::Specification.new do |s|
   s.licenses = ["Ruby".freeze]
   s.rdoc_options = ["--title".freeze, "JSON implemention for ruby".freeze, "--main".freeze, "README.md".freeze]
   s.required_ruby_version = Gem::Requirement.new(">= 1.9".freeze)
-  s.rubygems_version = "3.0.3".freeze
+  s.rubygems_version = "3.0.6".freeze
   s.summary = "JSON Implementation for Ruby".freeze
   s.test_files = ["./tests/test_helper.rb".freeze]
 
   if s.respond_to? :specification_version then
     s.specification_version = 4
-  end
 
-  if s.respond_to? :add_runtime_dependency then
-    s.add_development_dependency(%q<rake>.freeze, [">= 0"])
-    s.add_development_dependency(%q<test-unit>.freeze, ["~> 2.0"])
+    if Gem::Version.new(Gem::VERSION) >= Gem::Version.new('1.2.0') then
+      s.add_development_dependency(%q<rake>.freeze, [">= 0"])
+      s.add_development_dependency(%q<test-unit>.freeze, ["~> 2.0"])
+    else
+      s.add_dependency(%q<rake>.freeze, [">= 0"])
+      s.add_dependency(%q<test-unit>.freeze, ["~> 2.0"])
+    end
   else
     s.add_dependency(%q<rake>.freeze, [">= 0"])
     s.add_dependency(%q<test-unit>.freeze, ["~> 2.0"])
diff --git a/lib/json/version.rb b/lib/json/version.rb
index 115eb5bb..9d781df8 100644
--- a/lib/json/version.rb
+++ b/lib/json/version.rb
@@ -1,7 +1,7 @@
 # frozen_string_literal: false
 module JSON
   # JSON version
-  VERSION         = '2.2.0'
+  VERSION         = '2.3.0'
   VERSION_ARRAY   = VERSION.split(/\./).map { |x| x.to_i } # :nodoc:
   VERSION_MAJOR   = VERSION_ARRAY[0] # :nodoc:
   VERSION_MINOR   = VERSION_ARRAY[1] # :nodoc: