diff --git a/chef-handler-sns.gemspec b/chef-handler-sns.gemspec
index d626421..116cf4f 100644
--- a/chef-handler-sns.gemspec
+++ b/chef-handler-sns.gemspec
@@ -1,8 +1,8 @@
 $LOAD_PATH.push File.expand_path('../lib', __FILE__)
 require 'chef/handler/sns/version'
-chef_version =
-  ENV.key?('CHEF_VERSION') ? "#{ENV['CHEF_VERSION']}" : ['>= 0.9.0']
+chef_version = ENV.key?('CHEF_VERSION') ? ENV['CHEF_VERSION'] : ['>= 0.9.0']
 
+# rubocop:disable Metrics/BlockLength
 Gem::Specification.new do |s|
   s.name = 'chef-handler-sns'
   s.version = ::Chef::Handler::Sns::VERSION
@@ -31,11 +31,12 @@ Gem::Specification.new do |s|
   s.add_development_dependency 'mocha', '~> 1.1'
   s.add_development_dependency 'coveralls', '~> 0.7'
   s.add_development_dependency 'simplecov', '~> 0.9'
-  s.add_development_dependency 'rubocop', '~> 0.35.0'
+  s.add_development_dependency 'rubocop', '~> 0.47.0'
   s.add_development_dependency 'should_not', '~> 1.1'
   s.add_development_dependency 'yard', '~> 0.8'
   if Gem::Requirement.new('< 2.2.2')
-     .satisfied_by?(Gem::Version.new(RUBY_VERSION))
+                     .satisfied_by?(Gem::Version.new(RUBY_VERSION))
     s.add_development_dependency 'rack', '~> 1.0'
   end
 end
+# rubocop:enable Metrics/BlockLength
diff --git a/lib/chef/handler/sns/config.rb b/lib/chef/handler/sns/config.rb
index 6d5ed75..f50797c 100644
--- a/lib/chef/handler/sns/config.rb
+++ b/lib/chef/handler/sns/config.rb
@@ -42,7 +42,7 @@ module Config
         #
         # Required configuration options.
         #
-        REQUIRED = %w(access_key secret_key topic_arn)
+        REQUIRED = %w(access_key secret_key topic_arn).freeze
 
         #
         # Reads some configuration options from Ohai information.
@@ -108,13 +108,13 @@ def config_check(node = nil)
           config_from_ohai(node) if node
           REQUIRED.each do |key|
             next unless send(key).nil?
-            fail Exceptions::ValidationFailed,
-                 "Required argument #{key} is missing!"
+            raise Exceptions::ValidationFailed,
+                  "Required argument #{key} is missing!"
           end
 
           return unless body_template && !::File.exist?(body_template)
-          fail Exceptions::ValidationFailed,
-               "Template file not found: #{body_template}."
+          raise Exceptions::ValidationFailed,
+                "Template file not found: #{body_template}."
         end
 
         #
diff --git a/lib/chef/handler/sns/version.rb b/lib/chef/handler/sns/version.rb
index edac59a..7b57097 100644
--- a/lib/chef/handler/sns/version.rb
+++ b/lib/chef/handler/sns/version.rb
@@ -30,7 +30,7 @@ class Sns < ::Chef::Handler
       #
       # chef-handler-sns Ruby Gem version.
       #
-      VERSION = '2.1.0.dev'
+      VERSION = '2.1.0.dev'.freeze
     end
   end
 end
diff --git a/test/test_chef_handler_sns.rb b/test/test_chef_handler_sns.rb
index 7b4e589..75a2e42 100644
--- a/test/test_chef_handler_sns.rb
+++ b/test/test_chef_handler_sns.rb
@@ -40,6 +40,7 @@ def config
   end
 end
 
+# rubocop:disable Metrics/BlockLength
 describe Chef::Handler::Sns do
   let(:data_dir) { ::File.join(::File.dirname(__FILE__), 'data') }
   let(:node) do
@@ -301,3 +302,4 @@ def config
     sns_handler.run_report_safely(run_status)
   end
 end
+# rubocop:enable Metrics/BlockLength
diff --git a/test/test_chef_handler_sns_config.rb b/test/test_chef_handler_sns_config.rb
index e09f2f7..505fc74 100644
--- a/test/test_chef_handler_sns_config.rb
+++ b/test/test_chef_handler_sns_config.rb
@@ -25,10 +25,10 @@ class SnsConfig
 end
 
 class ChefFakeOhai < Chef::Handler::Sns::Config::Ohai
-  def intialize
-  end
+  def intialize; end
 end
 
+# rubocop:disable Metrics/BlockLength
 describe Chef::Handler::Sns::Config do
   let(:node) do
     node = Chef::Node.new
@@ -166,3 +166,4 @@ def intialize
     end
   end
 end
+# rubocop:enable Metrics/BlockLength
diff --git a/test/test_chef_handler_sns_config_ohai.rb b/test/test_chef_handler_sns_config_ohai.rb
index cf43f3a..5e9dd3d 100644
--- a/test/test_chef_handler_sns_config_ohai.rb
+++ b/test/test_chef_handler_sns_config_ohai.rb
@@ -19,6 +19,7 @@
 
 require 'helper'
 
+# rubocop:disable Metrics/BlockLength
 describe Chef::Handler::Sns::Config::Ohai do
   let(:node) do
     Chef::Node.new.tap do |node|
@@ -85,3 +86,4 @@
     end
   end
 end
+# rubocop:enable Metrics/BlockLength