diff --git a/.rubocop.yml b/.rubocop.yml
index c76d6ad7..10fbbd9b 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -2,7 +2,7 @@ require: rubocop-rspec
 
 AllCops:
   DisplayCopNames: true
-  TargetRubyVersion: 2.2
+  TargetRubyVersion: 2.3
   Exclude:
     - 'vendor/**/*'
     - 'spec/fixtures/**/*'
diff --git a/CHANGELOG.md b/CHANGELOG.md
index a267225a..4ce567c9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,7 @@
 * Fix `FactoryBot/AttributeDefinedStatically` not working with an explicit receiver. ([@composerinteralia][])
 * Add `RSpec/Dialect` enforces custom RSpec dialects. ([@gsamokovarov][])
 * Fix redundant blank lines in `RSpec/MultipleSubjects`'s autocorrect. ([@pirj][])
+* Drop support for ruby `2.2`. ([@bquorning][])
 
 ## 1.32.0 (2019-01-27)
 
diff --git a/Gemfile b/Gemfile
index 7a1348f1..515dec7c 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 source 'https://rubygems.org'
 
 gemspec
diff --git a/Rakefile b/Rakefile
index 0ea57573..4bea106c 100644
--- a/Rakefile
+++ b/Rakefile
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'open3'
 
 require 'bundler'
diff --git a/lib/rubocop-rspec_rails.rb b/lib/rubocop-rspec_rails.rb
index 475619a0..b3a550fe 100644
--- a/lib/rubocop-rspec_rails.rb
+++ b/lib/rubocop-rspec_rails.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'pathname'
 require 'yaml'
 
diff --git a/lib/rubocop/cop/rspec_rails/http_status.rb b/lib/rubocop/cop/rspec_rails/http_status.rb
index 897496a2..9941df49 100644
--- a/lib/rubocop/cop/rspec_rails/http_status.rb
+++ b/lib/rubocop/cop/rspec_rails/http_status.rb
@@ -67,7 +67,7 @@ def checker_class
           # :nodoc:
           class SymbolicStyleChecker
             MSG = 'Prefer `%<prefer>s` over `%<current>s` ' \
-                  'to describe HTTP status code.'.freeze
+                  'to describe HTTP status code.'
 
             attr_reader :node
             def initialize(node)
@@ -105,7 +105,7 @@ def custom_http_status_code?
           # :nodoc:
           class NumericStyleChecker
             MSG = 'Prefer `%<prefer>s` over `%<current>s` ' \
-                  'to describe HTTP status code.'.freeze
+                  'to describe HTTP status code.'
 
             WHITELIST_STATUS = %i[error success missing redirect].freeze
 
diff --git a/lib/rubocop/cop/rspec_rails_cops.rb b/lib/rubocop/cop/rspec_rails_cops.rb
index af75f325..927d0465 100644
--- a/lib/rubocop/cop/rspec_rails_cops.rb
+++ b/lib/rubocop/cop/rspec_rails_cops.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require_relative 'rspec/capybara/current_path_expectation'
 require_relative 'rspec/capybara/feature_methods'
 
diff --git a/lib/rubocop/rspec_rails/config_formatter.rb b/lib/rubocop/rspec_rails/config_formatter.rb
index 8a7e767d..ae863059 100644
--- a/lib/rubocop/rspec_rails/config_formatter.rb
+++ b/lib/rubocop/rspec_rails/config_formatter.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'yaml'
 
 module RuboCop
@@ -5,7 +7,7 @@ module RSpec
     # Builds a YAML config file from two config hashes
     class ConfigFormatter
       NAMESPACES = /^(RSpec|Capybara|FactoryBot|Rails)/.freeze
-      STYLE_GUIDE_BASE_URL = 'http://www.rubydoc.info/gems/rubocop-rspec/RuboCop/Cop/RSpec/'.freeze
+      STYLE_GUIDE_BASE_URL = 'http://www.rubydoc.info/gems/rubocop-rspec/RuboCop/Cop/RSpec/'
 
       def initialize(config, descriptions)
         @config       = config
diff --git a/lib/rubocop/rspec_rails/description_extractor.rb b/lib/rubocop/rspec_rails/description_extractor.rb
index ed48ce20..ad1e0a79 100644
--- a/lib/rubocop/rspec_rails/description_extractor.rb
+++ b/lib/rubocop/rspec_rails/description_extractor.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module RuboCop
   module RSpec
     # Extracts cop descriptions from YARD docstrings
@@ -20,7 +22,7 @@ def to_h
       # Decorator of a YARD code object for working with documented rspec cops
       class CodeObject
         COP_CLASS_NAMES = %w[RuboCop::Cop RuboCop::Cop::RSpec::Cop].freeze
-        RSPEC_NAMESPACE = 'RuboCop::Cop::RSpec'.freeze
+        RSPEC_NAMESPACE = 'RuboCop::Cop::RSpec'
 
         def initialize(yardoc)
           @yardoc = yardoc
diff --git a/lib/rubocop/rspec_rails/version.rb b/lib/rubocop/rspec_rails/version.rb
index 30412de4..27fd82b1 100644
--- a/lib/rubocop/rspec_rails/version.rb
+++ b/lib/rubocop/rspec_rails/version.rb
@@ -4,7 +4,7 @@ module RuboCop
   module RSpec
     # Version information for the RSpec RuboCop plugin.
     module Version
-      STRING = '1.32.0'.freeze
+      STRING = '1.32.0'
     end
   end
 end
diff --git a/rubocop-rspec_rails.gemspec b/rubocop-rspec_rails.gemspec
index 147b8b88..57f40cd0 100644
--- a/rubocop-rspec_rails.gemspec
+++ b/rubocop-rspec_rails.gemspec
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 $LOAD_PATH.unshift File.expand_path('lib', __dir__)
 require 'rubocop/rspec/version'
 
@@ -19,7 +21,7 @@ Gem::Specification.new do |spec|
 
   spec.version = RuboCop::RSpec::Version::STRING
   spec.platform = Gem::Platform::RUBY
-  spec.required_ruby_version = '>= 2.2.0'
+  spec.required_ruby_version = '>= 2.3.0'
 
   spec.require_paths = ['lib']
   spec.files = Dir[
diff --git a/spec/project/changelog_spec.rb b/spec/project/changelog_spec.rb
index 628d1a04..32f4cfbe 100644
--- a/spec/project/changelog_spec.rb
+++ b/spec/project/changelog_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 RSpec.describe 'CHANGELOG.md' do
   subject(:changelog) { SpecHelper::ROOT.join('CHANGELOG.md').read }
 
diff --git a/spec/project/default_config_spec.rb b/spec/project/default_config_spec.rb
index 4e0f9c00..ea832569 100644
--- a/spec/project/default_config_spec.rb
+++ b/spec/project/default_config_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 RSpec.describe 'config/default.yml' do
   subject(:default_config) do
     RuboCop::ConfigLoader.load_file('config/default.yml')
diff --git a/spec/shared/detects_style_behavior.rb b/spec/shared/detects_style_behavior.rb
index e9022b0c..90eb699a 100644
--- a/spec/shared/detects_style_behavior.rb
+++ b/spec/shared/detects_style_behavior.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 RSpec.shared_examples 'detects style' do |source, style, filename: 'x_spec.rb'|
   it 'generates a todo based on the detected style' do
     inspect_source(source, filename)
diff --git a/spec/shared/smoke_test_examples.rb b/spec/shared/smoke_test_examples.rb
index 61f30e76..85591467 100644
--- a/spec/shared/smoke_test_examples.rb
+++ b/spec/shared/smoke_test_examples.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 RSpec.shared_examples 'smoke test', type: :cop_spec do
   context 'with default configuration' do
     # This is overridden to avoid a number of specs that define `cop_config`
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index 8bc1180a..c15f55c7 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'rubocop'
 
 require 'rubocop/rspec/support'
diff --git a/spec/support/expect_offense.rb b/spec/support/expect_offense.rb
index 984ed1ee..a05f2b0d 100644
--- a/spec/support/expect_offense.rb
+++ b/spec/support/expect_offense.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # rubocop-rspec gem extension of RuboCop's ExpectOffense module.
 #
 # This mixin is the same as rubocop's ExpectOffense except the default
@@ -5,7 +7,7 @@
 module ExpectOffense
   include RuboCop::RSpec::ExpectOffense
 
-  DEFAULT_FILENAME = 'example_spec.rb'.freeze
+  DEFAULT_FILENAME = 'example_spec.rb'
 
   def expect_offense(source, filename = DEFAULT_FILENAME)
     super
diff --git a/tasks/cops_documentation.rake b/tasks/cops_documentation.rake
index 8c50e6fc..b826d110 100644
--- a/tasks/cops_documentation.rake
+++ b/tasks/cops_documentation.rake
@@ -19,7 +19,7 @@ task generate_cops_documentation: :yard_for_generate_documentation do
     content = h2(cop.cop_name)
     content << properties(config, cop)
     content << "#{description}\n"
-    content << examples(examples_objects) if examples_objects.count > 0
+    content << examples(examples_objects) if examples_objects.count.positive?
     content << configurations(pars)
     content << references(config, cop)
     content
@@ -43,27 +43,27 @@ task generate_cops_documentation: :yard_for_generate_documentation do
   end
 
   def h2(title)
-    content = "\n".dup
+    content = +"\n"
     content << "## #{title}\n"
     content << "\n"
     content
   end
 
   def h3(title)
-    content = "\n".dup
+    content = +"\n"
     content << "### #{title}\n"
     content << "\n"
     content
   end
 
   def h4(title)
-    content = "#### #{title}\n".dup
+    content = +"#### #{title}\n"
     content << "\n"
     content
   end
 
   def code_example(ruby_code)
-    content = "```ruby\n".dup
+    content = +"```ruby\n"
     content << ruby_code.text
       .gsub('@good', '# good')
       .gsub('@bad', '# bad').strip
@@ -157,7 +157,7 @@ task generate_cops_documentation: :yard_for_generate_documentation do
     end
     return if selected_cops.empty?
 
-    content = "# #{department}\n".dup
+    content = +"# #{department}\n"
     selected_cops.each do |cop|
       content << print_cop_with_doc(cop, config)
     end
@@ -199,7 +199,7 @@ task generate_cops_documentation: :yard_for_generate_documentation do
 
     type_title = department[0].upcase + department[1..-1]
     filename = "cops_#{department.downcase}.md"
-    content = "#### Department [#{type_title}](#{filename})\n\n".dup
+    content = +"#### Department [#{type_title}](#{filename})\n\n"
     selected_cops.each do |cop|
       anchor = cop.cop_name.sub('/', '').downcase
       content << "* [#{cop.cop_name}](#{filename}##{anchor})\n"
@@ -213,7 +213,7 @@ task generate_cops_documentation: :yard_for_generate_documentation do
   def print_table_of_contents(cops)
     path = "#{Dir.pwd}/manual/cops.md"
     original = File.read(path)
-    content = "<!-- START_COP_LIST -->\n".dup
+    content = +"<!-- START_COP_LIST -->\n"
 
     content << table_contents(cops)