diff --git a/declarative_authorization.gemspec b/declarative_authorization.gemspec
index c36e1cb7..a2f30162 100644
--- a/declarative_authorization.gemspec
+++ b/declarative_authorization.gemspec
@@ -12,6 +12,8 @@ Gem::Specification.new do |s|
   s.has_rdoc = true
   s.extra_rdoc_files = ['README.rdoc', 'CHANGELOG']
   s.homepage = %q{http://github.com/stffn/declarative_authorization}
+  s.add_development_dependency('test-unit')
+  s.add_development_dependency('ruby_parser', '~> 3.6.0')
 
   #s.add_dependency('rails', '>= 2.1.0')
 end
diff --git a/gemfiles/2.3.gemfile b/gemfiles/2.3.gemfile
index fa5f3b14..078d906a 100644
--- a/gemfiles/2.3.gemfile
+++ b/gemfiles/2.3.gemfile
@@ -2,7 +2,7 @@ source 'https://rubygems.org'
 
 gem 'rails', '~> 2.3.0'
 gem 'sqlite3'
-gem 'ruby_parser'
 gem 'rdoc'
+gem 'json'
 gemspec :path => '..'
 
diff --git a/gemfiles/3.0.gemfile b/gemfiles/3.0.gemfile
index d4349642..cde8ec80 100644
--- a/gemfiles/3.0.gemfile
+++ b/gemfiles/3.0.gemfile
@@ -2,7 +2,6 @@ source 'https://rubygems.org'
 
 gem 'rails', '~> 3.0.0'
 gem 'sqlite3'
-gem 'ruby_parser'
 gem 'rdoc'
 gemspec :path => '..'
 
diff --git a/gemfiles/3.1.gemfile b/gemfiles/3.1.gemfile
index c9cddba2..47e495c4 100644
--- a/gemfiles/3.1.gemfile
+++ b/gemfiles/3.1.gemfile
@@ -2,7 +2,6 @@ source 'https://rubygems.org'
 
 gem 'rails', '~> 3.1.0'
 gem 'sqlite3'
-gem 'ruby_parser'
 gem 'rdoc'
 gemspec :path => '..'
 
diff --git a/gemfiles/3.2.gemfile b/gemfiles/3.2.gemfile
index cdff0429..939a6b89 100644
--- a/gemfiles/3.2.gemfile
+++ b/gemfiles/3.2.gemfile
@@ -2,7 +2,6 @@ source 'https://rubygems.org'
 
 gem 'rails', '~> 3.2.0'
 gem 'sqlite3'
-gem 'ruby_parser'
 gem 'rdoc'
 gemspec :path => '..'
 
diff --git a/gemfiles/4.0.gemfile b/gemfiles/4.0.gemfile
index 2096153a..5de2126d 100644
--- a/gemfiles/4.0.gemfile
+++ b/gemfiles/4.0.gemfile
@@ -2,7 +2,6 @@ source 'https://rubygems.org'
 
 gem 'rails', '~> 4.0.0'
 gem 'sqlite3'
-gem 'ruby_parser'
 gem 'rdoc'
 gemspec :path => '..'
 
diff --git a/gemfiles/4.1.gemfile b/gemfiles/4.1.gemfile
index a54f675c..85f32ba5 100644
--- a/gemfiles/4.1.gemfile
+++ b/gemfiles/4.1.gemfile
@@ -2,6 +2,5 @@ source 'https://rubygems.org'
 
 gem 'rails', '~> 4.1.0'
 gem 'sqlite3'
-gem 'ruby_parser'
 gem 'rdoc'
-gemspec :path => '..'
\ No newline at end of file
+gemspec :path => '..'
diff --git a/gemfiles/4.2.gemfile b/gemfiles/4.2.gemfile
new file mode 100644
index 00000000..a9d60ab6
--- /dev/null
+++ b/gemfiles/4.2.gemfile
@@ -0,0 +1,6 @@
+source 'https://rubygems.org'
+
+gem 'rails', '~> 4.2.0'
+gem 'sqlite3'
+gem 'rdoc'
+gemspec :path => '..'