diff --git a/.rubocop.yml b/.rubocop.yml
new file mode 100644
index 0000000..6640ebf
--- /dev/null
+++ b/.rubocop.yml
@@ -0,0 +1,4 @@
+inherit_from: .rubocop_todo.yml
+
+AllCops:
+  DisplayCopNames: true
diff --git a/.rubocop_todo.yml b/.rubocop_todo.yml
new file mode 100644
index 0000000..5008d6e
--- /dev/null
+++ b/.rubocop_todo.yml
@@ -0,0 +1,416 @@
+# This configuration was generated by `rubocop --auto-gen-config`
+# on 2015-04-06 09:56:00 -0700 using RuboCop version 0.30.0.
+# The point is for the user to remove these configuration records
+# one by one as the offenses are removed from the code base.
+# Note that changes in the inspected code, or installation of new
+# versions of RuboCop, may require this file to be generated again.
+
+# Offense count: 2
+Lint/AmbiguousOperator:
+  Enabled: false
+
+# Offense count: 3
+# Configuration parameters: AllowSafeAssignment.
+Lint/AssignmentInCondition:
+  Enabled: false
+
+# Offense count: 1
+# Cop supports --auto-correct.
+Lint/BlockAlignment:
+  Enabled: false
+
+# Offense count: 1
+# Cop supports --auto-correct.
+Lint/DeprecatedClassMethods:
+  Enabled: false
+
+# Offense count: 1
+Lint/Eval:
+  Enabled: false
+
+# Offense count: 5
+Lint/ParenthesesAsGroupedExpression:
+  Enabled: false
+
+# Offense count: 4
+Lint/RescueException:
+  Enabled: false
+
+# Offense count: 2
+Lint/ShadowingOuterLocalVariable:
+  Enabled: false
+
+# Offense count: 6
+# Cop supports --auto-correct.
+Lint/UnusedBlockArgument:
+  Enabled: false
+
+# Offense count: 11
+Lint/UselessAssignment:
+  Enabled: false
+
+# Offense count: 25
+Metrics/AbcSize:
+  Max: 196
+
+# Offense count: 17
+Metrics/BlockNesting:
+  Max: 5
+
+# Offense count: 7
+# Configuration parameters: CountComments.
+Metrics/ClassLength:
+  Max: 342
+
+# Offense count: 12
+Metrics/CyclomaticComplexity:
+  Max: 60
+
+# Offense count: 347
+# Configuration parameters: AllowURI, URISchemes.
+Metrics/LineLength:
+  Max: 201
+
+# Offense count: 28
+# Configuration parameters: CountComments.
+Metrics/MethodLength:
+  Max: 128
+
+# Offense count: 1
+# Configuration parameters: CountKeywordArgs.
+Metrics/ParameterLists:
+  Max: 6
+
+# Offense count: 10
+Metrics/PerceivedComplexity:
+  Max: 46
+
+# Offense count: 4
+# Cop supports --auto-correct.
+Performance/Detect:
+  Enabled: false
+
+# Offense count: 3
+Style/AccessorMethodName:
+  Enabled: false
+
+# Offense count: 6
+# Cop supports --auto-correct.
+Style/Alias:
+  Enabled: false
+
+# Offense count: 1
+# Cop supports --auto-correct.
+Style/AlignArray:
+  Enabled: false
+
+# Offense count: 27
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle, SupportedStyles.
+Style/AndOr:
+  Enabled: false
+
+# Offense count: 1
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle, SupportedStyles.
+Style/BarePercentLiterals:
+  Enabled: false
+
+# Offense count: 29
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle, SupportedStyles, ProceduralMethods, FunctionalMethods, IgnoredMethods.
+Style/BlockDelimiters:
+  Enabled: false
+
+# Offense count: 1
+# Cop supports --auto-correct.
+Style/BlockEndNewline:
+  Enabled: false
+
+# Offense count: 44
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle, SupportedStyles.
+Style/BracesAroundHashParameters:
+  Enabled: false
+
+# Offense count: 8
+# Configuration parameters: IndentWhenRelativeTo, SupportedStyles, IndentOneStep.
+Style/CaseIndentation:
+  Enabled: false
+
+# Offense count: 3
+Style/ClassVars:
+  Enabled: false
+
+# Offense count: 2
+# Cop supports --auto-correct.
+Style/CommentIndentation:
+  Enabled: false
+
+# Offense count: 1
+# Cop supports --auto-correct.
+Style/DeprecatedHashMethods:
+  Enabled: false
+
+# Offense count: 7
+Style/Documentation:
+  Enabled: false
+
+# Offense count: 2
+Style/EachWithObject:
+  Enabled: false
+
+# Offense count: 3
+# Configuration parameters: EnforcedStyle, SupportedStyles.
+Style/EmptyElse:
+  Enabled: false
+
+# Offense count: 1
+# Cop supports --auto-correct.
+# Configuration parameters: AllowAdjacentOneLineDefs.
+Style/EmptyLineBetweenDefs:
+  Enabled: false
+
+# Offense count: 3
+# Cop supports --auto-correct.
+Style/EmptyLines:
+  Enabled: false
+
+# Offense count: 13
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle, SupportedStyles.
+Style/EmptyLinesAroundBlockBody:
+  Enabled: false
+
+# Offense count: 7
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle, SupportedStyles.
+Style/EmptyLinesAroundClassBody:
+  Enabled: false
+
+# Offense count: 23
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle, SupportedStyles.
+Style/EmptyLinesAroundModuleBody:
+  Enabled: false
+
+# Offense count: 1
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle, SupportedStyles.
+Style/FirstParameterIndentation:
+  Enabled: false
+
+# Offense count: 3
+# Configuration parameters: MinBodyLength.
+Style/GuardClause:
+  Enabled: false
+
+# Offense count: 8
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle, SupportedStyles, UseHashRocketsWithSymbolValues.
+Style/HashSyntax:
+  Enabled: false
+
+# Offense count: 11
+# Cop supports --auto-correct.
+# Configuration parameters: MaxLineLength.
+Style/IfUnlessModifier:
+  Enabled: false
+
+# Offense count: 20
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle, SupportedStyles.
+Style/IndentHash:
+  Enabled: false
+
+# Offense count: 1
+# Cop supports --auto-correct.
+# Configuration parameters: Width.
+Style/IndentationWidth:
+  Enabled: false
+
+# Offense count: 2
+# Cop supports --auto-correct.
+Style/LeadingCommentSpace:
+  Enabled: false
+
+# Offense count: 2
+# Configuration parameters: EnforcedStyle, SupportedStyles.
+Style/MethodName:
+  Enabled: false
+
+# Offense count: 1
+# Cop supports --auto-correct.
+Style/MultilineBlockLayout:
+  Enabled: false
+
+# Offense count: 6
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle, SupportedStyles.
+Style/MultilineOperationIndentation:
+  Enabled: false
+
+# Offense count: 16
+# Cop supports --auto-correct.
+Style/NegatedIf:
+  Enabled: false
+
+# Offense count: 1
+# Cop supports --auto-correct.
+Style/NegatedWhile:
+  Enabled: false
+
+# Offense count: 1
+# Configuration parameters: EnforcedStyle, MinBodyLength, SupportedStyles.
+Style/Next:
+  Enabled: false
+
+# Offense count: 16
+# Cop supports --auto-correct.
+Style/NumericLiterals:
+  MinDigits: 11
+
+# Offense count: 2
+# Cop supports --auto-correct.
+# Configuration parameters: AllowSafeAssignment.
+Style/ParenthesesAroundCondition:
+  Enabled: false
+
+# Offense count: 3
+# Cop supports --auto-correct.
+# Configuration parameters: PreferredDelimiters.
+Style/PercentLiteralDelimiters:
+  Enabled: false
+
+# Offense count: 35
+# Configuration parameters: SupportedStyles.
+Style/RaiseArgs:
+  EnforcedStyle: compact
+
+# Offense count: 1
+# Cop supports --auto-correct.
+# Configuration parameters: AllowMultipleReturnValues.
+Style/RedundantReturn:
+  Enabled: false
+
+# Offense count: 2
+Style/RescueModifier:
+  Enabled: false
+
+# Offense count: 1
+# Cop supports --auto-correct.
+Style/SelfAssignment:
+  Enabled: false
+
+# Offense count: 1
+# Cop supports --auto-correct.
+# Configuration parameters: AllowAsExpressionSeparator.
+Style/Semicolon:
+  Enabled: false
+
+# Offense count: 36
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle, SupportedStyles.
+Style/SignalException:
+  Enabled: false
+
+# Offense count: 2
+# Cop supports --auto-correct.
+Style/SingleSpaceBeforeFirstArg:
+  Enabled: false
+
+# Offense count: 1
+# Cop supports --auto-correct.
+Style/SpaceAfterColon:
+  Enabled: false
+
+# Offense count: 8058
+# Cop supports --auto-correct.
+Style/SpaceAfterComma:
+  Enabled: false
+
+# Offense count: 1
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyleInsidePipes, SupportedStyles.
+Style/SpaceAroundBlockParameters:
+  Enabled: false
+
+# Offense count: 30
+# Cop supports --auto-correct.
+# Configuration parameters: MultiSpaceAllowedForOperators.
+Style/SpaceAroundOperators:
+  Enabled: false
+
+# Offense count: 12
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle, SupportedStyles.
+Style/SpaceBeforeBlockBraces:
+  Enabled: false
+
+# Offense count: 1
+# Cop supports --auto-correct.
+Style/SpaceBeforeComment:
+  Enabled: false
+
+# Offense count: 46
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle, SupportedStyles, EnforcedStyleForEmptyBraces, SpaceBeforeBlockParameters.
+Style/SpaceInsideBlockBraces:
+  Enabled: false
+
+# Offense count: 321
+# Cop supports --auto-correct.
+Style/SpaceInsideBrackets:
+  Enabled: false
+
+# Offense count: 135
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle, EnforcedStyleForEmptyBraces, SupportedStyles.
+Style/SpaceInsideHashLiteralBraces:
+  Enabled: false
+
+# Offense count: 2
+# Cop supports --auto-correct.
+Style/SpecialGlobalVars:
+  Enabled: false
+
+# Offense count: 2148
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle, SupportedStyles.
+Style/StringLiterals:
+  Enabled: false
+
+# Offense count: 1
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle, SupportedStyles.
+Style/StringLiteralsInInterpolation:
+  Enabled: false
+
+# Offense count: 1
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle, SupportedStyles.
+Style/TrailingBlankLines:
+  Enabled: false
+
+# Offense count: 331
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyleForMultiline, SupportedStyles.
+Style/TrailingComma:
+  Enabled: false
+
+# Offense count: 1
+# Cop supports --auto-correct.
+# Configuration parameters: ExactNameMatch, AllowPredicates, AllowDSLWriters, IgnoreClassMethods, Whitelist.
+Style/TrivialAccessors:
+  Enabled: false
+
+# Offense count: 6
+# Cop supports --auto-correct.
+Style/WhileUntilDo:
+  Enabled: false
+
+# Offense count: 6
+# Cop supports --auto-correct.
+# Configuration parameters: WordRegex.
+Style/WordArray:
+  MinSize: 2
diff --git a/.travis.yml b/.travis.yml
index 2ef65c2..e5fd8ad 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,5 +1,4 @@
 language: ruby
-script: bundle exec rake test
 rvm:
   - 2.0.0
   - 2.1
diff --git a/Gemfile b/Gemfile
index 98294b4..76e062f 100644
--- a/Gemfile
+++ b/Gemfile
@@ -11,6 +11,7 @@ group :test do
   gem 'pry-byebug', :platform => :mri
   gem 'rspec'
   gem 'rspec-autotest'
+  gem 'rubocop', '~> 0.30.0'
 end
 
 gemspec
diff --git a/Rakefile b/Rakefile
index df33fd0..5a274b6 100644
--- a/Rakefile
+++ b/Rakefile
@@ -1,12 +1,11 @@
-require "bundler/gem_tasks"
-require "rspec/core/rake_task"
-require_relative "lib/tasks/generate_huffman_table"
-
-desc "Run all RSpec tests"
-RSpec::Core::RakeTask.new(:spec)
-
-task :default => :spec
-task :test => [:spec]
-
+require 'bundler/gem_tasks'
+require 'rspec/core/rake_task'
+require 'rubocop/rake_task'
 require 'yard'
+require_relative 'lib/tasks/generate_huffman_table'
+
+RSpec::Core::RakeTask.new
+RuboCop::RakeTask.new
 YARD::Rake::YardocTask.new
+
+task default: [:spec, :rubocop]