diff --git a/.rubocop.yml b/.rubocop.yml
new file mode 100644
index 0000000..b7dc82c
--- /dev/null
+++ b/.rubocop.yml
@@ -0,0 +1,13 @@
+inherit_from: .rubocop_todo.yml
+
+AllCops:
+  TargetRubyVersion: '2.3'
+
+Gemspec/OrderedDependencies:
+  Enabled: false
+
+Metrics/LineLength:
+  Max: 200
+
+Style/Documentation:
+  Enabled: false
diff --git a/.rubocop_todo.yml b/.rubocop_todo.yml
new file mode 100644
index 0000000..f097309
--- /dev/null
+++ b/.rubocop_todo.yml
@@ -0,0 +1,308 @@
+# This configuration was generated by
+# `rubocop --auto-gen-config`
+# on 2018-02-23 11:13:02 +0100 using RuboCop version 0.52.1.
+# 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: 1
+# Cop supports --auto-correct.
+# Configuration parameters: AllowForAlignment, ForceEqualSignAlignment.
+Layout/ExtraSpacing:
+  Exclude:
+    - 'dyndnsd.gemspec'
+
+# Offense count: 1
+# Cop supports --auto-correct.
+Layout/SpaceAfterComma:
+  Exclude:
+    - 'lib/dyndnsd/generator/bind.rb'
+
+# Offense count: 3
+# Cop supports --auto-correct.
+# Configuration parameters: AllowForAlignment.
+Layout/SpaceAroundOperators:
+  Exclude:
+    - 'dyndnsd.gemspec'
+
+# Offense count: 38
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle, EnforcedStyleForEmptyBraces.
+# SupportedStyles: space, no_space, compact
+# SupportedStylesForEmptyBraces: space, no_space
+Layout/SpaceInsideHashLiteralBraces:
+  Exclude:
+    - 'lib/dyndnsd.rb'
+    - 'lib/dyndnsd/responder/dyndns_style.rb'
+    - 'lib/dyndnsd/responder/rest_style.rb'
+
+# Offense count: 1
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: final_newline, final_blank_line
+Layout/TrailingBlankLines:
+  Exclude:
+    - 'spec/support/dummy_database.rb'
+
+# Offense count: 8
+# Cop supports --auto-correct.
+Layout/TrailingWhitespace:
+  Exclude:
+    - 'lib/dyndnsd/database.rb'
+    - 'lib/dyndnsd/updater/command_with_bind_zone.rb'
+    - 'spec/support/dummy_database.rb'
+
+# Offense count: 4
+Lint/IneffectiveAccessModifier:
+  Exclude:
+    - 'lib/dyndnsd.rb'
+
+# Offense count: 1
+# Cop supports --auto-correct.
+Lint/ScriptPermission:
+  Exclude:
+    - 'lib/dyndnsd.rb'
+
+# Offense count: 5
+# Cop supports --auto-correct.
+# Configuration parameters: AllowUnusedKeywordArguments, IgnoreEmptyMethods.
+Lint/UnusedMethodArgument:
+  Exclude:
+    - 'lib/dyndnsd.rb'
+    - 'lib/dyndnsd/responder/dyndns_style.rb'
+    - 'lib/dyndnsd/responder/rest_style.rb'
+
+# Offense count: 1
+Lint/UselessAssignment:
+  Exclude:
+    - 'spec/daemon_spec.rb'
+
+# Offense count: 5
+Metrics/AbcSize:
+  Max: 31
+
+# Offense count: 1
+# Configuration parameters: CountComments, ExcludedMethods.
+Metrics/BlockLength:
+  Max: 159
+
+# Offense count: 1
+# Configuration parameters: CountComments.
+Metrics/ClassLength:
+  Max: 149
+
+# Offense count: 6
+# Configuration parameters: CountComments.
+Metrics/MethodLength:
+  Max: 19
+
+# Offense count: 2
+Naming/AccessorMethodName:
+  Exclude:
+    - 'lib/dyndnsd/responder/dyndns_style.rb'
+    - 'lib/dyndnsd/responder/rest_style.rb'
+
+# Offense count: 3
+# Configuration parameters: NamePrefix, NamePrefixBlacklist, NameWhitelist, MethodDefinitionMacros.
+# NamePrefix: is_, has_, have_
+# NamePrefixBlacklist: is_, has_, have_
+# NameWhitelist: is_a?
+# MethodDefinitionMacros: define_method, define_singleton_method
+Naming/PredicateName:
+  Exclude:
+    - 'spec/**/*'
+    - 'lib/dyndnsd.rb'
+    - 'lib/dyndnsd/helper.rb'
+
+# Offense count: 1
+# Cop supports --auto-correct.
+# Configuration parameters: AutoCorrect.
+Security/JSONLoad:
+  Exclude:
+    - 'lib/dyndnsd/database.rb'
+
+# Offense count: 1
+# Cop supports --auto-correct.
+Security/YAMLLoad:
+  Exclude:
+    - 'lib/dyndnsd.rb'
+
+# Offense count: 4
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: always, conditionals
+Style/AndOr:
+  Exclude:
+    - 'lib/dyndnsd.rb'
+
+# Offense count: 1
+# Cop supports --auto-correct.
+Style/ColonMethodCall:
+  Exclude:
+    - 'lib/dyndnsd.rb'
+
+# Offense count: 3
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle, SingleLineConditionsOnly, IncludeTernaryExpressions.
+# SupportedStyles: assign_to_condition, assign_inside_condition
+Style/ConditionalAssignment:
+  Exclude:
+    - 'lib/dyndnsd.rb'
+    - 'lib/dyndnsd/database.rb'
+
+# Offense count: 2
+# Cop supports --auto-correct.
+Style/DefWithParentheses:
+  Exclude:
+    - 'lib/dyndnsd.rb'
+
+# Offense count: 1
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: format, sprintf, percent
+Style/FormatString:
+  Exclude:
+    - 'lib/dyndnsd.rb'
+
+# Offense count: 3
+# Configuration parameters: .
+# SupportedStyles: annotated, template, unannotated
+Style/FormatStringToken:
+  EnforcedStyle: unannotated
+
+# Offense count: 15
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: when_needed, always, never
+Style/FrozenStringLiteralComment:
+  Exclude:
+    - 'Gemfile'
+    - 'Rakefile'
+    - 'dyndnsd.gemspec'
+    - 'lib/dyndnsd.rb'
+    - 'lib/dyndnsd/database.rb'
+    - 'lib/dyndnsd/generator/bind.rb'
+    - 'lib/dyndnsd/helper.rb'
+    - 'lib/dyndnsd/responder/dyndns_style.rb'
+    - 'lib/dyndnsd/responder/rest_style.rb'
+    - 'lib/dyndnsd/updater/command_with_bind_zone.rb'
+    - 'lib/dyndnsd/version.rb'
+    - 'spec/daemon_spec.rb'
+    - 'spec/spec_helper.rb'
+    - 'spec/support/dummy_database.rb'
+    - 'spec/support/dummy_updater.rb'
+
+# Offense count: 2
+# Configuration parameters: MinBodyLength.
+Style/GuardClause:
+  Exclude:
+    - 'lib/dyndnsd/responder/dyndns_style.rb'
+    - 'lib/dyndnsd/responder/rest_style.rb'
+
+# Offense count: 3
+# Cop supports --auto-correct.
+# Configuration parameters: UseHashRocketsWithSymbolValues, PreferHashRocketsForNonAlnumEndingSymbols.
+# SupportedStyles: ruby19, hash_rockets, no_mixed_keys, ruby19_no_mixed_keys
+Style/HashSyntax:
+  EnforcedStyle: hash_rockets
+
+# Offense count: 2
+Style/IdenticalConditionalBranches:
+  Exclude:
+    - 'lib/dyndnsd.rb'
+
+# Offense count: 1
+# Cop supports --auto-correct.
+# Configuration parameters: InverseMethods, InverseBlocks.
+Style/InverseMethods:
+  Exclude:
+    - 'lib/dyndnsd.rb'
+
+# Offense count: 1
+# Cop supports --auto-correct.
+Style/MethodCallWithoutArgsParentheses:
+  Exclude:
+    - 'lib/dyndnsd.rb'
+
+# Offense count: 1
+# Cop supports --auto-correct.
+Style/MutableConstant:
+  Exclude:
+    - 'lib/dyndnsd/version.rb'
+
+# Offense count: 6
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: both, prefix, postfix
+Style/NegatedIf:
+  Exclude:
+    - 'lib/dyndnsd.rb'
+    - 'lib/dyndnsd/helper.rb'
+
+# Offense count: 8
+# Cop supports --auto-correct.
+Style/Not:
+  Exclude:
+    - 'lib/dyndnsd.rb'
+    - 'lib/dyndnsd/helper.rb'
+
+# Offense count: 6
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: short, verbose
+Style/PreferredHashMethods:
+  Exclude:
+    - 'lib/dyndnsd.rb'
+    - 'lib/dyndnsd/responder/dyndns_style.rb'
+    - 'lib/dyndnsd/responder/rest_style.rb'
+
+# Offense count: 1
+# Cop supports --auto-correct.
+Style/RedundantBegin:
+  Exclude:
+    - 'lib/dyndnsd/helper.rb'
+
+# Offense count: 1
+# Cop supports --auto-correct.
+# Configuration parameters: AllowAsExpressionSeparator.
+Style/Semicolon:
+  Exclude:
+    - 'lib/dyndnsd.rb'
+
+# Offense count: 2
+# Cop supports --auto-correct.
+# Configuration parameters: .
+# SupportedStyles: use_perl_names, use_english_names
+Style/SpecialGlobalVars:
+  EnforcedStyle: use_perl_names
+
+# Offense count: 80
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle, ConsistentQuotesInMultiline.
+# SupportedStyles: single_quotes, double_quotes
+Style/StringLiterals:
+  Exclude:
+    - 'dyndnsd.gemspec'
+    - 'lib/dyndnsd.rb'
+    - 'lib/dyndnsd/generator/bind.rb'
+    - 'lib/dyndnsd/responder/dyndns_style.rb'
+    - 'lib/dyndnsd/responder/rest_style.rb'
+    - 'lib/dyndnsd/version.rb'
+    - 'spec/daemon_spec.rb'
+
+# Offense count: 1
+# Cop supports --auto-correct.
+# Configuration parameters: MinSize.
+# SupportedStyles: percent, brackets
+Style/SymbolArray:
+  EnforcedStyle: brackets
+
+# Offense count: 2
+# Cop supports --auto-correct.
+# Configuration parameters: IgnoredMethods.
+# IgnoredMethods: respond_to, define_method
+Style/SymbolProc:
+  Exclude:
+    - 'lib/dyndnsd.rb'
+    - 'lib/dyndnsd/database.rb'
diff --git a/Rakefile b/Rakefile
index 93cb943..ff8bf7c 100644
--- a/Rakefile
+++ b/Rakefile
@@ -1,6 +1,8 @@
 require 'bundler/gem_tasks'
 require 'rspec/core/rake_task'
+require 'rubocop/rake_task'
 
 RSpec::Core::RakeTask.new(:spec)
+RuboCop::RakeTask.new
 
-task :default => :spec
+task :default => [:rubocop, :spec]
diff --git a/dyndnsd.gemspec b/dyndnsd.gemspec
index 2bfed0e..376d0ae 100644
--- a/dyndnsd.gemspec
+++ b/dyndnsd.gemspec
@@ -28,4 +28,5 @@ Gem::Specification.new do |s|
   s.add_development_dependency 'rake'
   s.add_development_dependency 'rspec'
   s.add_development_dependency 'rack-test'
+  s.add_development_dependency 'rubocop', '~> 0.52.1'
 end