diff --git a/.rubocop.yml b/.rubocop.yml
index 1097e9d..85c9ff2 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -1,4 +1,6 @@
 ---
+require: rubocop-packaging
+
 AllCops:
   DisplayCopNames:    true
   DisplayStyleGuide:  true
diff --git a/fixturama.gemspec b/fixturama.gemspec
index faa8166..271180a 100644
--- a/fixturama.gemspec
+++ b/fixturama.gemspec
@@ -40,10 +40,11 @@ Gem::Specification.new do |gem|
 
   gem.add_runtime_dependency "factory_bot", "~> 4.0"
   gem.add_runtime_dependency "rspec", "~> 3.0"
-  gem.add_runtime_dependency "hashie", "~> 3.0"
+  gem.add_runtime_dependency "hashie", "> 3", "< 5"
   gem.add_runtime_dependency "webmock", "~> 3.0"
 
   gem.add_development_dependency "rake", "~> 13.0"
   gem.add_development_dependency "rspec-its", "~> 1.3"
   gem.add_development_dependency "rubocop", "~> 0.80"
+  gem.add_development_dependency "rubocop-packaging"
 end