diff --git a/Gemfile b/Gemfile
index 5034345..de7fcff 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 source 'https://rubygems.org'
 
 # Specify your gem's dependencies in bunnyrun.gemspec
diff --git a/Rakefile b/Rakefile
index 4c774a2..82bb534 100644
--- a/Rakefile
+++ b/Rakefile
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'bundler/gem_tasks'
 require 'rspec/core/rake_task'
 
diff --git a/bin/console b/bin/console
index 6e7f2a7..d44485f 100755
--- a/bin/console
+++ b/bin/console
@@ -1,7 +1,8 @@
 #!/usr/bin/env ruby
+# frozen_string_literal: true
 
-require "bundler/setup"
-require "bunnyrun"
+require 'bundler/setup'
+require 'bunnyrun'
 
 # You can add fixtures and/or initialization code here to make experimenting
 # with your gem easier. You can also use a different console, if you like.
@@ -10,5 +11,5 @@ require "bunnyrun"
 # require "pry"
 # Pry.start
 
-require "irb"
+require 'irb'
 IRB.start(__FILE__)
diff --git a/bunnyrun.gemspec b/bunnyrun.gemspec
index 9f8545c..3cd0ee9 100644
--- a/bunnyrun.gemspec
+++ b/bunnyrun.gemspec
@@ -1,4 +1,4 @@
-# coding: utf-8
+# frozen_string_literal: true
 
 lib = File.expand_path('../lib', __FILE__)
 $LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
@@ -23,10 +23,10 @@ Gem::Specification.new do |spec|
   spec.require_paths = ['lib']
 
   spec.add_development_dependency 'bundler', '~> 1.14'
+  spec.add_development_dependency 'byebug'
   spec.add_development_dependency 'rake', '~> 10.0'
   spec.add_development_dependency 'rspec', '~> 3.0'
-  spec.add_development_dependency 'rubocop', '~> 0.50'
-  spec.add_development_dependency 'byebug'
+  spec.add_development_dependency 'rubocop', '~> 0.51'
 
   spec.add_runtime_dependency 'bunny', '~> 2.6'
   spec.add_runtime_dependency 'trollop', '~> 2.1.2'
diff --git a/lib/bunny_run.rb b/lib/bunny_run.rb
index 1869f9b..304a689 100644
--- a/lib/bunny_run.rb
+++ b/lib/bunny_run.rb
@@ -1 +1,3 @@
+# frozen_string_literal: true
+
 require 'bunnyrun'
diff --git a/lib/bunnyrun/consumer.rb b/lib/bunnyrun/consumer.rb
index 9a4562d..4a591a6 100644
--- a/lib/bunnyrun/consumer.rb
+++ b/lib/bunnyrun/consumer.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'bunnyrun/message'
 
 module BunnyRun
diff --git a/lib/bunnyrun/message.rb b/lib/bunnyrun/message.rb
index 567160b..0bd5ee3 100644
--- a/lib/bunnyrun/message.rb
+++ b/lib/bunnyrun/message.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module BunnyRun
   class Message
     attr_reader :delivery_info
diff --git a/lib/bunnyrun/runner.rb b/lib/bunnyrun/runner.rb
index 510a901..1009b1d 100644
--- a/lib/bunnyrun/runner.rb
+++ b/lib/bunnyrun/runner.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'bunny'
 require 'logger'
 
diff --git a/lib/bunnyrun/version.rb b/lib/bunnyrun/version.rb
index 0407877..c2a6812 100644
--- a/lib/bunnyrun/version.rb
+++ b/lib/bunnyrun/version.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module BunnyRun
-  VERSION = '0.1.0'.freeze
+  VERSION = '0.1.0'
 end
diff --git a/spec/bunnyrun_spec.rb b/spec/bunnyrun_spec.rb
index 2e28654..bff3d4e 100644
--- a/spec/bunnyrun_spec.rb
+++ b/spec/bunnyrun_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 RSpec.describe Bunnyrun do
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index 7343800..8afb796 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'bundler/setup'
 require 'bunnyrun'