asciidoctor-epub3.gemspec in asciidoctor-epub3-1.5.0.alpha.9 vs asciidoctor-epub3.gemspec in asciidoctor-epub3-1.5.0.alpha.10

@@ -1,6 +1,7 @@
-# -*- encoding: utf-8 -*-
+# frozen_string_literal: true
+
 require File.expand_path('lib/asciidoctor-epub3/version', File.dirname(__FILE__))
 require 'open3' unless defined? Open3
 
 Gem::Specification.new do |s|
   s.name = 'asciidoctor-epub3'
@@ -28,12 +29,15 @@
   s.executables = %w(asciidoctor-epub3 adb-push-ebook)
   s.test_files = s.files.grep(/^(?:test|spec|feature)\/.*$/)
 
   s.require_paths = ['lib']
 
-  s.add_development_dependency 'rake', '~> 12.3.2'
+  s.add_development_dependency 'rake', '~> 12.3.0'
+  s.add_development_dependency 'rspec', '~> 3.9.0'
+  s.add_development_dependency 'rubocop', '~> 0.78.0'
+  s.add_development_dependency 'rubocop-rspec', '~> 1.37.0'
 
   s.add_runtime_dependency 'asciidoctor', '>= 1.5.0', '< 3.0.0'
-  s.add_runtime_dependency 'gepub', '~> 1.0.2'
-  s.add_runtime_dependency 'thread_safe', '~> 0.3.6'
-  s.add_runtime_dependency 'concurrent-ruby', '~> 1.1.5'
+  s.add_runtime_dependency 'concurrent-ruby', '~> 1.1.0'
+  s.add_runtime_dependency 'gepub', '~> 1.0.0'
+  s.add_runtime_dependency 'thread_safe', '~> 0.3.0'
 end