diff --git a/Gemfile b/Gemfile
index 3f1a9ea..7c8384a 100644
--- a/Gemfile
+++ b/Gemfile
@@ -3,6 +3,7 @@ source 'https://rubygems.org'
 gemspec
 
 group :test do
+  gem 'johnson'
   gem 'therubyracer', platform: :mri
   gem 'therubyrhino', ">=1.73.3", platform: :jruby
   gem 'minitest', require: false
diff --git a/lib/execjs/johnson_runtime.rb b/lib/execjs/johnson_runtime.rb
index c47a618..111f948 100644
--- a/lib/execjs/johnson_runtime.rb
+++ b/lib/execjs/johnson_runtime.rb
@@ -98,7 +98,7 @@ module ExecJS
     end
 
     def deprecated?
-      true
+      false
     end
   end
 end