diff --git a/Gemfile b/Gemfile
index 5013310..f82aa24 100644
--- a/Gemfile
+++ b/Gemfile
@@ -2,5 +2,3 @@ source 'https://rubygems.org'
 
 # Specify your gem's dependencies in nagios_check_resque.gemspec
 gemspec
-
-gem 'nagios_check', git: 'https://github.com/tf/nagios_check', branch: 'check-result'
diff --git a/lib/nagios_check_resque/version.rb b/lib/nagios_check_resque/version.rb
index 4d2b21a..42e883d 100644
--- a/lib/nagios_check_resque/version.rb
+++ b/lib/nagios_check_resque/version.rb
@@ -1,3 +1,3 @@
 module NagiosCheckResque
-  VERSION = '1.2.0'.freeze
+  VERSION = '2.0.0'.freeze
 end
diff --git a/nagios_check_resque.gemspec b/nagios_check_resque.gemspec
index 1597555..66db9a8 100644
--- a/nagios_check_resque.gemspec
+++ b/nagios_check_resque.gemspec
@@ -20,12 +20,12 @@ Gem::Specification.new do |spec|
   spec.executables   = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }
   spec.require_paths = ['lib']
 
-  spec.required_ruby_version = '>= 2.0'
+  spec.required_ruby_version = '>= 3.0'
 
   spec.add_dependency 'nagios_check', '~> 0.4.0'
-  spec.add_dependency 'resque', ['>= 1.25', '< 3']
+  spec.add_dependency 'resque', ['>= 3', '< 4']
 
-  spec.add_development_dependency 'bundler', '~> 1.14'
+  spec.add_development_dependency 'bundler', '~> 2.5'
   spec.add_development_dependency 'rake', '~> 10.0'
   spec.add_development_dependency 'rspec', '~> 3.6'
 end