diff --git a/Gemfile b/Gemfile
index 379f975d..40222c59 100644
--- a/Gemfile
+++ b/Gemfile
@@ -24,4 +24,7 @@ if RUBY_VERSION >= '2.4' && RUBY_ENGINE == 'ruby'
   gem "rubocop", "~> 0.52.1"
 end
 
+gem "rake", ">= 12.3.3"
+gem "thread_order", "~> 1.1.0"
+
 eval_gemfile 'Gemfile-custom' if File.exist?('Gemfile-custom')
diff --git a/rspec-support.gemspec b/rspec-support.gemspec
index 625f57cd..69cacbe2 100644
--- a/rspec-support.gemspec
+++ b/rspec-support.gemspec
@@ -33,7 +33,4 @@ Gem::Specification.new do |spec|
   end
 
   spec.required_ruby_version = '>= 2.3.0'
-
-  spec.add_development_dependency "rake", ">= 12.3.3"
-  spec.add_development_dependency "thread_order", "~> 1.1.0"
 end