memery.gemspec in memery-1.3.0 vs memery.gemspec in memery-1.4.0

@@ -3,10 +3,12 @@
 lib = File.expand_path("lib", __dir__)
 $LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
 require "memery/version"
 
 Gem::Specification.new do |spec|
+  spec.required_ruby_version = ">= 2.5.0"
+
   spec.name          = "memery"
   spec.version       = Memery::VERSION
   spec.authors       = ["Yuri Smirnov"]
   spec.email         = ["[e-mail]"]
 
@@ -20,9 +22,10 @@
   end
   spec.require_paths = ["lib"]
 
   spec.add_runtime_dependency "ruby2_keywords", "~> 0.0.2"
 
+  spec.add_development_dependency "activesupport"
   spec.add_development_dependency "benchmark-ips"
   spec.add_development_dependency "benchmark-memory"
   spec.add_development_dependency "bundler"
   spec.add_development_dependency "coveralls"
   spec.add_development_dependency "pry"