diff --git a/Gemfile b/Gemfile
index f7200f1..7cd124e 100644
--- a/Gemfile
+++ b/Gemfile
@@ -3,3 +3,10 @@
 source 'http://rubygems.org'
 
 gemspec
+
+group :development, :test do
+  gem 'rake', '~> 13.0.6'
+  gem 'rspec', '~> 3.3'
+  gem 'rspec_junit_formatter', '~> 0.2'
+  gem 'rubocop', '~> 1.23'
+end
diff --git a/README.md b/README.md
index b15bba6..71d985d 100644
--- a/README.md
+++ b/README.md
@@ -89,6 +89,12 @@ comment = Comment.new(text: 'Hey!')
 comment.text_html # => '<p>Hey!</p>'
 ```
 
+## Development
+
+### Run Rubocop
+
+
+
 ## Licence
 
 AutoHtml is released under the [MIT License](https://raw.githubusercontent.com/dejan/auto_html/master/MIT-LICENSE).
diff --git a/auto_html.gemspec b/auto_html.gemspec
index e8db8a4..0e6979d 100644
--- a/auto_html.gemspec
+++ b/auto_html.gemspec
@@ -19,11 +19,6 @@ Gem::Specification.new do |gem|
 
   gem.required_ruby_version = '>= 2.5.0'
 
-  gem.add_development_dependency 'rake', '~> 13.0.6'
-  gem.add_development_dependency 'rspec', '~> 3.3'
-  gem.add_development_dependency 'rspec_junit_formatter', '~> 0.2'
-  gem.add_development_dependency 'rubocop', '~> 1.23'
-
   gem.files = Dir['Rakefile', '{bin,lib,man,test,spec}/**/*',
                   'README*', 'LICENSE'] & `git ls-files -z`.split("\0")
   gem.metadata = {