diff --git a/Gemfile b/Gemfile
index b4e2a20bb..8bcbf50a7 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,3 +1,10 @@
 source "https://rubygems.org"
 
 gemspec
+
+group :development do
+  gem "bundler"
+  gem "minitest"
+  gem "coveralls"
+  gem "rubocop"
+end
diff --git a/rake.gemspec b/rake.gemspec
index 66c567ca9..1fb4515f1 100644
--- a/rake.gemspec
+++ b/rake.gemspec
@@ -33,10 +33,4 @@ Rake has the following features:
   s.rubygems_version = "2.6.1".freeze
   s.required_rubygems_version = Gem::Requirement.new(">= 1.3.2".freeze)
   s.rdoc_options = ["--main".freeze, "README.rdoc".freeze]
-
-  s.add_development_dependency(%q<bundler>.freeze)
-  s.add_development_dependency(%q<minitest>.freeze)
-  s.add_development_dependency(%q<rdoc>.freeze)
-  s.add_development_dependency(%q<coveralls>.freeze)
-  s.add_development_dependency(%q<rubocop>.freeze)
 end