diff --git a/.rubocop.yml b/.rubocop.yml
new file mode 100644
index 0000000..d98aadf
--- /dev/null
+++ b/.rubocop.yml
@@ -0,0 +1,4 @@
+inherit_from: .rubocop_todo.yml
+
+AllCops:
+  TargetRubyVersion: 2.3
diff --git a/.rubocop_todo.yml b/.rubocop_todo.yml
new file mode 100644
index 0000000..9f5cdcb
--- /dev/null
+++ b/.rubocop_todo.yml
@@ -0,0 +1,372 @@
+# This configuration was generated by
+# `rubocop --auto-gen-config`
+# on 2019-05-31 14:29:36 +0200 using RuboCop version 0.71.0.
+# 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
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle, IndentationWidth.
+# SupportedStyles: with_first_argument, with_fixed_indentation
+Layout/AlignArguments:
+  Exclude:
+    - 'lib/report_portal/rspec/formatter.rb'
+
+# Offense count: 2
+# Cop supports --auto-correct.
+Layout/EmptyLineAfterGuardClause:
+  Exclude:
+    - 'lib/report_portal/cucumber/json_slurper.rb'
+    - 'tests/features/step_definitions/steps.rb'
+
+# Offense count: 1
+# Cop supports --auto-correct.
+# Configuration parameters: AllowForAlignment, AllowBeforeTrailingComments, ForceEqualSignAlignment.
+Layout/ExtraSpacing:
+  Exclude:
+    - 'lib/report_portal/logging/logging_appender.rb'
+
+# Offense count: 1
+# Cop supports --auto-correct.
+Layout/LeadingCommentSpace:
+  Exclude:
+    - 'lib/report_portal/cucumber/parallel_formatter.rb'
+
+# Offense count: 2
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle, IndentationWidth.
+# SupportedStyles: aligned, indented
+Layout/MultilineOperationIndentation:
+  Exclude:
+    - 'lib/report_portal/cucumber/report.rb'
+
+# Offense count: 3
+# Cop supports --auto-correct.
+Layout/SpaceAfterComma:
+  Exclude:
+    - 'lib/report_portal/cucumber/report.rb'
+    - 'lib/reportportal.rb'
+    - 'tests/formatter_spec.rb'
+
+# Offense count: 1
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: space, no_space
+Layout/SpaceAroundEqualsInParameterDefault:
+  Exclude:
+    - 'lib/reportportal.rb'
+
+# Offense count: 5
+# Cop supports --auto-correct.
+# Configuration parameters: AllowForAlignment.
+Layout/SpaceAroundOperators:
+  Exclude:
+    - 'lib/report_portal/cucumber/report.rb'
+    - 'lib/report_portal/logging/logging_appender.rb'
+    - 'lib/report_portal/rspec/formatter.rb'
+
+# Offense count: 4
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle, EnforcedStyleForEmptyBraces, SpaceBeforeBlockParameters.
+# SupportedStyles: space, no_space
+# SupportedStylesForEmptyBraces: space, no_space
+Layout/SpaceInsideBlockBraces:
+  Exclude:
+    - 'tests/formatter_spec.rb'
+
+# Offense count: 5
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle, EnforcedStyleForEmptyBraces.
+# SupportedStyles: space, no_space, compact
+# SupportedStylesForEmptyBraces: space, no_space
+Layout/SpaceInsideHashLiteralBraces:
+  Exclude:
+    - 'lib/reportportal.rb'
+    - 'tests/formatter_spec.rb'
+
+# Offense count: 100
+# Cop supports --auto-correct.
+# Configuration parameters: AllowInHeredoc.
+Layout/TrailingWhitespace:
+  Enabled: false
+
+# Offense count: 1
+Lint/ParenthesesAsGroupedExpression:
+  Exclude:
+    - 'tests/features/step_definitions/steps.rb'
+
+# Offense count: 1
+# Cop supports --auto-correct.
+Lint/UnneededRequireStatement:
+  Exclude:
+    - 'lib/report_portal/cucumber/formatter.rb'
+
+# Offense count: 2
+Lint/UriEscapeUnescape:
+  Exclude:
+    - 'lib/reportportal.rb'
+
+# Offense count: 18
+Metrics/AbcSize:
+  Max: 106
+
+# Offense count: 5
+# Configuration parameters: CountComments, ExcludedMethods.
+# ExcludedMethods: refine
+Metrics/BlockLength:
+  Max: 74
+
+# Offense count: 2
+# Configuration parameters: CountComments.
+Metrics/ClassLength:
+  Max: 165
+
+# Offense count: 3
+Metrics/CyclomaticComplexity:
+  Max: 13
+
+# Offense count: 21
+# Configuration parameters: CountComments, ExcludedMethods.
+Metrics/MethodLength:
+  Max: 79
+
+# Offense count: 1
+# Configuration parameters: CountComments.
+Metrics/ModuleLength:
+  Max: 158
+
+# Offense count: 5
+Metrics/PerceivedComplexity:
+  Max: 14
+
+# Offense count: 3
+# Configuration parameters: MinNameLength, AllowNamesEndingInNumbers, AllowedNames, ForbiddenNames.
+# AllowedNames: io, id, to, by, on, in, at, ip, db
+Naming/UncommunicativeMethodParamName:
+  Exclude:
+    - 'lib/report_portal/patches/rest_client.rb'
+
+# Offense count: 1
+# Cop supports --auto-correct.
+Security/YAMLLoad:
+  Exclude:
+    - 'lib/report_portal/settings.rb'
+
+# Offense count: 1
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: braces, no_braces, context_dependent
+Style/BracesAroundHashParameters:
+  Exclude:
+    - 'tests/formatter_spec.rb'
+
+# Offense count: 1
+Style/CommentedKeyword:
+  Exclude:
+    - 'lib/report_portal/cucumber/report.rb'
+
+# Offense count: 2
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle, SingleLineConditionsOnly, IncludeTernaryExpressions.
+# SupportedStyles: assign_to_condition, assign_inside_condition
+Style/ConditionalAssignment:
+  Exclude:
+    - 'lib/reportportal.rb'
+
+# Offense count: 9
+Style/Documentation:
+  Exclude:
+    - 'spec/**/*'
+    - 'test/**/*'
+    - 'lib/report_portal/cucumber/formatter.rb'
+    - 'lib/report_portal/cucumber/parallel_formatter.rb'
+    - 'lib/report_portal/cucumber/parallel_report.rb'
+    - 'lib/report_portal/logging/logger.rb'
+    - 'lib/report_portal/patches/rest_client.rb'
+    - 'lib/report_portal/rspec/formatter.rb'
+    - 'lib/report_portal/settings.rb'
+    - 'lib/reportportal.rb'
+
+# Offense count: 2
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: empty, nil, both
+Style/EmptyElse:
+  Exclude:
+    - 'lib/report_portal/cucumber/json_slurper.rb'
+    - 'lib/reportportal.rb'
+
+# Offense count: 2
+# Cop supports --auto-correct.
+Style/ExpandPathArguments:
+  Exclude:
+    - 'Rakefile'
+    - 'reportportal.gemspec'
+
+# Offense count: 2
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: format, sprintf, percent
+Style/FormatString:
+  Exclude:
+    - 'lib/report_portal/cucumber/report.rb'
+
+# Offense count: 5
+# Configuration parameters: .
+# SupportedStyles: annotated, template, unannotated
+Style/FormatStringToken:
+  EnforcedStyle: unannotated
+
+# Offense count: 21
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: always, never
+Style/FrozenStringLiteralComment:
+  Enabled: false
+
+# Offense count: 8
+# Configuration parameters: AllowedVariables.
+Style/GlobalVars:
+  Exclude:
+    - 'tests/features/step_definitions/steps.rb'
+    - 'tests/features/support/env.rb'
+
+# Offense count: 8
+# Configuration parameters: MinBodyLength.
+Style/GuardClause:
+  Exclude:
+    - 'lib/report_portal/cucumber/parallel_report.rb'
+    - 'lib/report_portal/cucumber/report.rb'
+    - 'lib/report_portal/rspec/formatter.rb'
+    - 'lib/reportportal.rb'
+    - 'tests/features/step_definitions/steps.rb'
+
+# Offense count: 3
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle, UseHashRocketsWithSymbolValues, PreferHashRocketsForNonAlnumEndingSymbols.
+# SupportedStyles: ruby19, hash_rockets, no_mixed_keys, ruby19_no_mixed_keys
+Style/HashSyntax:
+  Exclude:
+    - 'lib/reportportal.rb'
+    - 'tests/formatter_spec.rb'
+
+# Offense count: 5
+# Cop supports --auto-correct.
+Style/IfUnlessModifier:
+  Exclude:
+    - 'lib/report_portal/cucumber/json_slurper.rb'
+    - 'lib/report_portal/cucumber/report.rb'
+    - 'tests/features/support/env.rb'
+
+# Offense count: 1
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle, Autocorrect.
+# SupportedStyles: module_function, extend_self
+Style/ModuleFunction:
+  Exclude:
+    - 'lib/report_portal/patches/rest_client.rb'
+
+# Offense count: 3
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: literals, strict
+Style/MutableConstant:
+  Exclude:
+    - 'lib/report_portal/settings.rb'
+    - 'lib/report_portal/version.rb'
+    - 'lib/reportportal.rb'
+
+# Offense count: 1
+# Cop supports --auto-correct.
+# Configuration parameters: AutoCorrect, EnforcedStyle, IgnoredMethods.
+# SupportedStyles: predicate, comparison
+Style/NumericPredicate:
+  Exclude:
+    - 'spec/**/*'
+    - 'lib/report_portal/cucumber/formatter.rb'
+
+# Offense count: 1
+# Cop supports --auto-correct.
+# Configuration parameters: PreferredDelimiters.
+Style/PercentLiteralDelimiters:
+  Exclude:
+    - 'lib/report_portal/cucumber/json_slurper.rb'
+
+# Offense count: 1
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: implicit, explicit
+Style/RescueStandardError:
+  Exclude:
+    - 'lib/reportportal.rb'
+
+# Offense count: 2
+# Cop supports --auto-correct.
+# Configuration parameters: ConvertCodeThatCanStartToReturnNil, Whitelist.
+# Whitelist: present?, blank?, presence, try, try!
+Style/SafeNavigation:
+  Exclude:
+    - 'lib/report_portal/cucumber/json_slurper.rb'
+    - 'lib/reportportal.rb'
+
+# Offense count: 10
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: only_raise, only_fail, semantic
+Style/SignalException:
+  Exclude:
+    - 'lib/report_portal/cucumber/json_slurper.rb'
+    - 'lib/report_portal/settings.rb'
+    - 'tests/features/step_definitions/steps.rb'
+    - 'tests/features/support/env.rb'
+    - 'tests/spec/test_spec.rb'
+
+# Offense count: 3
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: use_perl_names, use_english_names
+Style/SpecialGlobalVars:
+  Exclude:
+    - 'lib/reportportal.rb'
+
+# Offense count: 2
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle, ConsistentQuotesInMultiline.
+# SupportedStyles: single_quotes, double_quotes
+Style/StringLiterals:
+  Exclude:
+    - 'lib/report_portal/cucumber/report.rb'
+    - 'lib/report_portal/tasks.rb'
+
+# Offense count: 5
+# Cop supports --auto-correct.
+# Configuration parameters: MinSize.
+# SupportedStyles: percent, brackets
+Style/SymbolArray:
+  EnforcedStyle: brackets
+
+# Offense count: 2
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle, AllowSafeAssignment.
+# SupportedStyles: require_parentheses, require_no_parentheses, require_parentheses_when_complex
+Style/TernaryParentheses:
+  Exclude:
+    - 'lib/report_portal/cucumber/report.rb'
+    - 'lib/report_portal/rspec/formatter.rb'
+
+# Offense count: 1
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyleForMultiline.
+# SupportedStylesForMultiline: comma, consistent_comma, no_comma
+Style/TrailingCommaInHashLiteral:
+  Exclude:
+    - 'lib/report_portal/settings.rb'
+
+# Offense count: 102
+# Cop supports --auto-correct.
+# Configuration parameters: AutoCorrect, AllowHeredoc, AllowURI, URISchemes, IgnoreCopDirectives, IgnoredPatterns.
+# URISchemes: http, https
+Metrics/LineLength:
+  Max: 164
diff --git a/.travis.yml b/.travis.yml
index 6298504..2e07845 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,6 +2,7 @@ dist: trusty
 sudo: required
 language: ruby
 rvm:
- - 2.2
  - 2.3
  - 2.4
+ - 2.5
+ - 2.6
diff --git a/Gemfile b/Gemfile
index 12723c1..e45c32c 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,11 +1,12 @@
 source 'https://rubygems.org'
 
+gemspec
+
 gem 'cucumber', '~> 3'
-gem 'rest-client'
-gem 'rubytree', git: 'https://github.com/razboev/RubyTree'
-gem 'rspec'
-gem 'rake'
 gem 'parallel_tests'
+gem 'rake'
+gem 'rspec'
+gem 'rubytree', git: 'https://github.com/razboev/RubyTree'
 
-gem 'logging'
 gem 'log4r'
+gem 'logging'
diff --git a/README.md b/README.md
index 671478b..9c5eb28 100644
--- a/README.md
+++ b/README.md
@@ -10,7 +10,7 @@
 
 ## Installation
 
-Use Ruby 2.2+
+Use Ruby 2.3+
 
 **Rubygems**
 
diff --git a/Rakefile b/Rakefile
index 2d87ec1..98e5178 100644
--- a/Rakefile
+++ b/Rakefile
@@ -3,8 +3,11 @@ $LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
 
 # used for testing purposes
 require 'report_portal/tasks'
+require 'rubocop/rake_task'
 
-task default: %w[test]
+RuboCop::RakeTask.new
+
+task default: %w[rubocop test]
 
 task :test do
   # execute tests here, e.g.
diff --git a/reportportal.gemspec b/reportportal.gemspec
index 441a1b1..c5a110f 100644
--- a/reportportal.gemspec
+++ b/reportportal.gemspec
@@ -11,9 +11,11 @@ Gem::Specification.new do |s|
   s.email                  = 'dzmitry_humianiuk@epam.com'
   s.homepage               = 'https://github.com/reportportal/agent-ruby'
   s.files                  = ['README.md', 'LICENSE', 'LICENSE.LESSER'] + Dir['lib/**/*']
-  s.required_ruby_version  = '>= 1.9.3'
+  s.required_ruby_version  = '>= 2.3.0'
   s.license                = 'Apache-2.0'
 
   s.add_dependency('rest-client', '~> 2.0')
   s.add_dependency('rubytree', '>=0.9.3')
+
+  s.add_development_dependency('rubocop', '0.71')
 end