diff --git a/.rubocop.yml b/.rubocop.yml
index d04d593..91b0d0b 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -20,3 +20,6 @@ Metrics/MethodLength:
 
 Style/IndentHash:
   EnforcedStyle: consistent
+
+Style/FileName:
+  Enabled: false
diff --git a/.rubocop_todo.yml b/.rubocop_todo.yml
index 9b026f0..c8e4076 100644
--- a/.rubocop_todo.yml
+++ b/.rubocop_todo.yml
@@ -48,15 +48,9 @@ Style/ClassVars:
 Style/Documentation:
   Enabled: false
 
-# Offense count: 5
-# Configuration parameters: ExpectMatchingDefinition, Regex, IgnoreExecutableScripts.
-Style/FileName:
+Style/MixinGrouping:
   Exclude:
-    - 'lib/grape-swagger.rb'
-    - 'spec/swagger_v2/api_swagger_v2_definitions-models_spec.rb'
-    - 'spec/swagger_v2/api_swagger_v2_format-content_type_spec.rb'
-    - 'spec/swagger_v2/api_swagger_v2_type-format_spec.rb'
-    - 'spec/swagger_v2/grape-swagger_spec.rb'
+    - spec/**/*
 
 # Offense count: 1
 # Cop supports --auto-correct.
diff --git a/.travis.yml b/.travis.yml
index bd8d507..0bbe233 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -10,7 +10,7 @@ after_success:
   - bundle exec danger
 
 rvm:
-  - 2.4.0
+  - 2.4.1
   - 2.3.3
 
 env:
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6849ac6..e3baeb9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,16 @@
 
 #### Features
 
+* Your contribution here.
+
+#### Fixes
+
+* Your contribution here.
+
+###  0.27.0 (March 27, 2014)
+
+#### Features
+
 * [#583](https://github.com/ruby-grape/grape-swagger/pull/583): Issue #582: document file response - [@LeFnord](https://github.com/LeFnord).
 * [#588](https://github.com/ruby-grape/grape-swagger/pull/588): Allow extension keys in Info object - [@mattyr](https://github.com/mattyr).
 * [#589](https://github.com/ruby-grape/grape-swagger/pull/589): Allow overriding tag definitions in Info object - [@mattyr](https://github.com/mattyr).
@@ -17,7 +27,7 @@
 
 * Your contribution here.
 
-### 0.26.1 (February 3, 2014)
+### 0.26.1 (February 3, 2017)
 
 #### Features
 
diff --git a/Dangerfile b/Dangerfile
index f05fedd..8288190 100644
--- a/Dangerfile
+++ b/Dangerfile
@@ -1 +1,3 @@
+# frozen_string_literal: true
+
 danger.import_dangerfile(gem: 'ruby-grape-danger')
diff --git a/Gemfile b/Gemfile
index 86c1226..bd24875 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 source 'http://rubygems.org'
 
 ruby RUBY_VERSION
@@ -24,11 +25,12 @@ group :development, :test do
   gem 'rake'
   gem 'rdoc'
   gem 'rspec', '~> 3.0'
-  gem 'rubocop', '~> 0.46'
+  gem 'rubocop', '~> 0.47'
 end
+
 group :test do
   gem 'coveralls', require: false
-  gem 'grape-entity'
+  gem 'grape-entity', '~>0.5'
   gem 'grape-swagger-entity'
   gem 'ruby-grape-danger', '~> 0.1.1', require: false
   gem 'simplecov', require: false
diff --git a/README.md b/README.md
index 84cffb3..f6ab03d 100644
--- a/README.md
+++ b/README.md
@@ -49,14 +49,9 @@ grape-swagger | swagger spec | grape                   | grape-entity | represen
 --------------|--------------|-------------------------|--------------|---------------|
 0.10.5        |     1.2      | >= 0.10.0 ... <= 0.14.0 |  < 0.5.0     | n/a           |
 0.11.0        |     1.2      |               >= 0.16.2 |  < 0.5.0     | n/a           |
-0.20.1        |     2.0      | >= 0.12.0 ... <= 0.14.0 | <= 0.5.1     | n/a           |
-0.20.3        |     2.0      | >= 0.12.0 ... ~> 0.16.2 | ~> 0.5.1     | n/a           |
-0.21.0        |     2.0      | >= 0.12.0 ... <= 0.16.2 | <= 0.5.1     | >= 2.4.1      |
-0.23.0        |     2.0      | >= 0.12.0 ... <= 0.17.0 | <= 0.5.1     | >= 2.4.1      |
-0.24.0        |     2.0      | >= 0.12.0 ... <= 0.18.0 | <= 0.5.1     | >= 2.4.1      |
-0.25.0        |     2.0      | >= 0.14.0 ... <= 0.18.0 | <= 0.5.2     | >= 2.4.1      |
 0.25.2        |     2.0      | >= 0.14.0 ... <= 0.18.0 | <= 0.6.0     | >= 2.4.1      |
 0.26.0        |     2.0      | >= 0.16.2               | <= 0.6.1     | >= 2.4.1      |
+0.27.0        |     2.0      | >= 0.16.2               | => 0.5.0     | >= 2.4.1      |
 
 <a name="swagger-spec" />
 ## Swagger-Spec
diff --git a/Rakefile b/Rakefile
index ca87972..328b3ca 100644
--- a/Rakefile
+++ b/Rakefile
@@ -18,4 +18,4 @@ RSpec::Core::RakeTask.new(:spec)
 require 'rubocop/rake_task'
 RuboCop::RakeTask.new(:rubocop)
 
-task default: [:spec, :rubocop]
+task default: %i(spec rubocop)
diff --git a/grape-swagger.gemspec b/grape-swagger.gemspec
index bd8b7f8..3d1736c 100644
--- a/grape-swagger.gemspec
+++ b/grape-swagger.gemspec
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 $LOAD_PATH.push File.expand_path('../lib', __FILE__)
 require 'grape-swagger/version'
 
diff --git a/lib/grape-swagger.rb b/lib/grape-swagger.rb
index c285b90..d2cf471 100644
--- a/lib/grape-swagger.rb
+++ b/lib/grape-swagger.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 require 'grape'
 
 require 'grape-swagger/version'
@@ -107,7 +108,7 @@ module Grape
               ns.options[:swagger][:nested] != false
           end
 
-          parent_standalone_namespaces = standalone_namespaces.reject { |ns_name, _| !name.start_with?(ns_name) }
+          parent_standalone_namespaces = standalone_namespaces.select { |ns_name, _| name.start_with?(ns_name) }
           # add only to the main route
           # if the namespace is not within any other namespace appearing as standalone resource
           # rubocop:disable Style/Next
diff --git a/lib/grape-swagger/doc_methods.rb b/lib/grape-swagger/doc_methods.rb
index a45dfbe..2c2ace1 100644
--- a/lib/grape-swagger/doc_methods.rb
+++ b/lib/grape-swagger/doc_methods.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 require 'grape-swagger/doc_methods/status_codes'
 require 'grape-swagger/doc_methods/produces_consumes'
 require 'grape-swagger/doc_methods/data_type'
@@ -38,7 +39,7 @@ module GrapeSwagger
       class_variables_from(options)
 
       if formatter
-        [:format, :default_format, :default_error_formatter].each do |method|
+        %i(format default_format default_error_formatter).each do |method|
           send(method, formatter)
         end
       end
diff --git a/lib/grape-swagger/doc_methods/build_model_definition.rb b/lib/grape-swagger/doc_methods/build_model_definition.rb
index 13026c3..4de36ff 100644
--- a/lib/grape-swagger/doc_methods/build_model_definition.rb
+++ b/lib/grape-swagger/doc_methods/build_model_definition.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 module GrapeSwagger
   module DocMethods
     class BuildModelDefinition
diff --git a/lib/grape-swagger/doc_methods/data_type.rb b/lib/grape-swagger/doc_methods/data_type.rb
index a407f8d..3f32575 100644
--- a/lib/grape-swagger/doc_methods/data_type.rb
+++ b/lib/grape-swagger/doc_methods/data_type.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 module GrapeSwagger
   module DocMethods
     class DataType
diff --git a/lib/grape-swagger/doc_methods/extensions.rb b/lib/grape-swagger/doc_methods/extensions.rb
index 8be4c3e..abb47fc 100644
--- a/lib/grape-swagger/doc_methods/extensions.rb
+++ b/lib/grape-swagger/doc_methods/extensions.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 module GrapeSwagger
   module DocMethods
     class Extensions
diff --git a/lib/grape-swagger/doc_methods/headers.rb b/lib/grape-swagger/doc_methods/headers.rb
index 709a27c..e84ec45 100644
--- a/lib/grape-swagger/doc_methods/headers.rb
+++ b/lib/grape-swagger/doc_methods/headers.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 module GrapeSwagger
   module DocMethods
     class Headers
diff --git a/lib/grape-swagger/doc_methods/move_params.rb b/lib/grape-swagger/doc_methods/move_params.rb
index 7a3a141..17b3461 100644
--- a/lib/grape-swagger/doc_methods/move_params.rb
+++ b/lib/grape-swagger/doc_methods/move_params.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 module GrapeSwagger
   module DocMethods
     class MoveParams
@@ -197,7 +198,7 @@ module GrapeSwagger
         end
 
         def property_keys
-          [:type, :format, :description, :minimum, :maximum, :items]
+          %i(type format description minimum maximum items)
         end
 
         def deletable?(param)
diff --git a/lib/grape-swagger/doc_methods/operation_id.rb b/lib/grape-swagger/doc_methods/operation_id.rb
index c62bc14..9d74c04 100644
--- a/lib/grape-swagger/doc_methods/operation_id.rb
+++ b/lib/grape-swagger/doc_methods/operation_id.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 module GrapeSwagger
   module DocMethods
     class OperationId
diff --git a/lib/grape-swagger/doc_methods/optional_object.rb b/lib/grape-swagger/doc_methods/optional_object.rb
index faccf30..9ced41a 100644
--- a/lib/grape-swagger/doc_methods/optional_object.rb
+++ b/lib/grape-swagger/doc_methods/optional_object.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 module GrapeSwagger
   module DocMethods
     class OptionalObject
diff --git a/lib/grape-swagger/doc_methods/parse_params.rb b/lib/grape-swagger/doc_methods/parse_params.rb
index d2af2ea..47a2e05 100644
--- a/lib/grape-swagger/doc_methods/parse_params.rb
+++ b/lib/grape-swagger/doc_methods/parse_params.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 module GrapeSwagger
   module DocMethods
     class ParseParams
diff --git a/lib/grape-swagger/doc_methods/path_string.rb b/lib/grape-swagger/doc_methods/path_string.rb
index f1d5958..6446b60 100644
--- a/lib/grape-swagger/doc_methods/path_string.rb
+++ b/lib/grape-swagger/doc_methods/path_string.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 module GrapeSwagger
   module DocMethods
     class PathString
diff --git a/lib/grape-swagger/doc_methods/produces_consumes.rb b/lib/grape-swagger/doc_methods/produces_consumes.rb
index a991c35..3243224 100644
--- a/lib/grape-swagger/doc_methods/produces_consumes.rb
+++ b/lib/grape-swagger/doc_methods/produces_consumes.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 module GrapeSwagger
   module DocMethods
     class ProducesConsumes
diff --git a/lib/grape-swagger/doc_methods/status_codes.rb b/lib/grape-swagger/doc_methods/status_codes.rb
index 0056cda..0796707 100644
--- a/lib/grape-swagger/doc_methods/status_codes.rb
+++ b/lib/grape-swagger/doc_methods/status_codes.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 module GrapeSwagger
   module DocMethods
     class StatusCodes
diff --git a/lib/grape-swagger/doc_methods/tag_name_description.rb b/lib/grape-swagger/doc_methods/tag_name_description.rb
index 5f3b665..ab501a6 100644
--- a/lib/grape-swagger/doc_methods/tag_name_description.rb
+++ b/lib/grape-swagger/doc_methods/tag_name_description.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 module GrapeSwagger
   module DocMethods
     class TagNameDescription
diff --git a/lib/grape-swagger/doc_methods/version.rb b/lib/grape-swagger/doc_methods/version.rb
index c4aec4c..0dbd25e 100644
--- a/lib/grape-swagger/doc_methods/version.rb
+++ b/lib/grape-swagger/doc_methods/version.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 module GrapeSwagger
   module DocMethods
     class Version
diff --git a/lib/grape-swagger/endpoint.rb b/lib/grape-swagger/endpoint.rb
index f642cd2..2f0f001 100644
--- a/lib/grape-swagger/endpoint.rb
+++ b/lib/grape-swagger/endpoint.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 require 'active_support'
 require 'active_support/core_ext/string/inflections.rb'
 
@@ -148,7 +149,7 @@ module Grape
 
       mime_types = GrapeSwagger::DocMethods::ProducesConsumes.call(format)
 
-      route_mime_types = [:formats, :content_types, :produces].map do |producer|
+      route_mime_types = %i(formats content_types produces).map do |producer|
         possible = route.options[producer]
         GrapeSwagger::DocMethods::ProducesConsumes.call(possible) if possible.present?
       end.flatten.compact.uniq
@@ -161,7 +162,7 @@ module Grape
       if route.settings[:description] && route.settings[:description][:consumes]
         format = route.settings[:description][:consumes]
       end
-      mime_types = GrapeSwagger::DocMethods::ProducesConsumes.call(format) if [:post, :put].include?(method)
+      mime_types = GrapeSwagger::DocMethods::ProducesConsumes.call(format) if %i(post put).include?(method)
 
       mime_types
     end
diff --git a/lib/grape-swagger/errors.rb b/lib/grape-swagger/errors.rb
index cd3832e..aaf3ff8 100644
--- a/lib/grape-swagger/errors.rb
+++ b/lib/grape-swagger/errors.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 module GrapeSwagger
   module Errors
     class UnregisteredParser < StandardError; end
diff --git a/lib/grape-swagger/model_parsers.rb b/lib/grape-swagger/model_parsers.rb
index 153eef0..bacef82 100644
--- a/lib/grape-swagger/model_parsers.rb
+++ b/lib/grape-swagger/model_parsers.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 module GrapeSwagger
   class ModelParsers
     include Enumerable
diff --git a/lib/grape-swagger/rake/oapi_tasks.rb b/lib/grape-swagger/rake/oapi_tasks.rb
index e5ea800..2b44938 100644
--- a/lib/grape-swagger/rake/oapi_tasks.rb
+++ b/lib/grape-swagger/rake/oapi_tasks.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 require 'rake'
 require 'rake/tasklib'
 require 'rack/test'
diff --git a/lib/grape-swagger/version.rb b/lib/grape-swagger/version.rb
index 5c54bba..d91814e 100644
--- a/lib/grape-swagger/version.rb
+++ b/lib/grape-swagger/version.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 module GrapeSwagger
-  VERSION = '0.26.1'
+  VERSION = '0.27.0'
 end
diff --git a/spec/issues/403_versions_spec.rb b/spec/issues/403_versions_spec.rb
index 9cf3f54..ebdde00 100644
--- a/spec/issues/403_versions_spec.rb
+++ b/spec/issues/403_versions_spec.rb
@@ -1,5 +1,6 @@
 # encoding: utf-8
 # frozen_string_literal: true
+
 require 'spec_helper'
 
 describe 'describing versions' do
diff --git a/spec/issues/427_entity_as_string_spec.rb b/spec/issues/427_entity_as_string_spec.rb
index 137b599..cff1589 100644
--- a/spec/issues/427_entity_as_string_spec.rb
+++ b/spec/issues/427_entity_as_string_spec.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 require 'spec_helper'
 
 describe '#427 nested entity given as string' do
diff --git a/spec/issues/430_entity_definitions_spec.rb b/spec/issues/430_entity_definitions_spec.rb
index 053723a..2cdcdfd 100644
--- a/spec/issues/430_entity_definitions_spec.rb
+++ b/spec/issues/430_entity_definitions_spec.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 require 'spec_helper'
 
 describe 'definition names' do
diff --git a/spec/issues/532_allow_custom_format_spec.rb b/spec/issues/532_allow_custom_format_spec.rb
index 3076a7e..907b232 100644
--- a/spec/issues/532_allow_custom_format_spec.rb
+++ b/spec/issues/532_allow_custom_format_spec.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 require 'spec_helper'
 
 describe '#532 allow custom format' do
diff --git a/spec/issues/533_specify_status_code_spec.rb b/spec/issues/533_specify_status_code_spec.rb
index 39ed5fa..a3e4eb4 100644
--- a/spec/issues/533_specify_status_code_spec.rb
+++ b/spec/issues/533_specify_status_code_spec.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 require 'spec_helper'
 
 describe '#533 specify status codes' do
diff --git a/spec/issues/537_enum_values_spec.rb b/spec/issues/537_enum_values_spec.rb
index 0342539..12aae39 100644
--- a/spec/issues/537_enum_values_spec.rb
+++ b/spec/issues/537_enum_values_spec.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 require 'spec_helper'
 
 describe '#537 enum values spec' do
@@ -6,7 +7,7 @@ describe '#537 enum values spec' do
     Class.new(Grape::API) do
       namespace :issue_537 do
         class Spec < Grape::Entity
-          expose :enum_property, documentation: { values: [:foo, :bar] }
+          expose :enum_property, documentation: { values: %i(foo bar) }
           expose :enum_property_default, documentation: { values: %w(a b c), default: 'c' }
           expose :own_format, documentation: { format: 'log' }
         end
diff --git a/spec/issues/539_array_post_body_spec.rb b/spec/issues/539_array_post_body_spec.rb
index 8eb8586..73c429c 100644
--- a/spec/issues/539_array_post_body_spec.rb
+++ b/spec/issues/539_array_post_body_spec.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 require 'spec_helper'
 
 describe '#539 post params given as array' do
diff --git a/spec/issues/542_array_of_type_in_post_body_spec.rb b/spec/issues/542_array_of_type_in_post_body_spec.rb
index ec52684..4e815c3 100644
--- a/spec/issues/542_array_of_type_in_post_body_spec.rb
+++ b/spec/issues/542_array_of_type_in_post_body_spec.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 require 'spec_helper'
 
 describe '#542 array of type in post params' do
diff --git a/spec/issues/553_align_array_put_post_params_spec.rb b/spec/issues/553_align_array_put_post_params_spec.rb
index 0741a99..c969fcc 100644
--- a/spec/issues/553_align_array_put_post_params_spec.rb
+++ b/spec/issues/553_align_array_put_post_params_spec.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 require 'spec_helper'
 
 describe '#553 array of type in post/put params' do
diff --git a/spec/issues/572_array_post_body_spec.rb b/spec/issues/572_array_post_body_spec.rb
index 9aaea2c..bdb35ab 100644
--- a/spec/issues/572_array_post_body_spec.rb
+++ b/spec/issues/572_array_post_body_spec.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 require 'spec_helper'
 
 describe '#572 is_array is applied to all possible responses' do
diff --git a/spec/issues/579_align_put_post_parameters_spec.rb b/spec/issues/579_align_put_post_parameters_spec.rb
index 67ef136..13fe559 100644
--- a/spec/issues/579_align_put_post_parameters_spec.rb
+++ b/spec/issues/579_align_put_post_parameters_spec.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 require 'spec_helper'
 
 describe '#579 put / post parameters spec' do
diff --git a/spec/issues/582_file_response_spec.rb b/spec/issues/582_file_response_spec.rb
index b8174ee..5c73f89 100644
--- a/spec/issues/582_file_response_spec.rb
+++ b/spec/issues/582_file_response_spec.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 require 'spec_helper'
 
 describe '#582 respond with a file' do
diff --git a/spec/issues/587_range_parameter_delimited_by_dash_spec.rb b/spec/issues/587_range_parameter_delimited_by_dash_spec.rb
index b9622f5..40794ab 100644
--- a/spec/issues/587_range_parameter_delimited_by_dash_spec.rb
+++ b/spec/issues/587_range_parameter_delimited_by_dash_spec.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 require 'spec_helper'
 
 describe '#587 process route with parameters delimited by dash' do
diff --git a/spec/lib/data_type_spec.rb b/spec/lib/data_type_spec.rb
index 88c3589..7f81415 100644
--- a/spec/lib/data_type_spec.rb
+++ b/spec/lib/data_type_spec.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 require 'spec_helper'
 
 describe GrapeSwagger::DocMethods::DataType do
diff --git a/spec/lib/endpoint_spec.rb b/spec/lib/endpoint_spec.rb
index 845397b..cf40244 100644
--- a/spec/lib/endpoint_spec.rb
+++ b/spec/lib/endpoint_spec.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 require 'spec_helper'
 
 describe Grape::Endpoint do
diff --git a/spec/lib/extensions_spec.rb b/spec/lib/extensions_spec.rb
index de9aeab..37612e3 100644
--- a/spec/lib/extensions_spec.rb
+++ b/spec/lib/extensions_spec.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 require 'spec_helper'
 
 describe GrapeSwagger::DocMethods::Extensions do
diff --git a/spec/lib/model_parsers_spec.rb b/spec/lib/model_parsers_spec.rb
index a9830fd..8828e54 100644
--- a/spec/lib/model_parsers_spec.rb
+++ b/spec/lib/model_parsers_spec.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 require 'spec_helper'
 
 describe GrapeSwagger::ModelParsers do
diff --git a/spec/lib/move_params_spec.rb b/spec/lib/move_params_spec.rb
index 663ca3e..5c15d4c 100644
--- a/spec/lib/move_params_spec.rb
+++ b/spec/lib/move_params_spec.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 require 'spec_helper'
 
 describe GrapeSwagger::DocMethods::MoveParams do
diff --git a/spec/lib/oapi_tasks_spec.rb b/spec/lib/oapi_tasks_spec.rb
index 9ffb47a..9fbac30 100644
--- a/spec/lib/oapi_tasks_spec.rb
+++ b/spec/lib/oapi_tasks_spec.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 require 'spec_helper'
 
 RSpec.describe GrapeSwagger::Rake::OapiTasks do
diff --git a/spec/lib/operation_id_spec.rb b/spec/lib/operation_id_spec.rb
index 7c61e76..578d82e 100644
--- a/spec/lib/operation_id_spec.rb
+++ b/spec/lib/operation_id_spec.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: false
+
 require 'spec_helper'
 
 describe GrapeSwagger::DocMethods::OperationId do
diff --git a/spec/lib/optional_object_spec.rb b/spec/lib/optional_object_spec.rb
index 1253f68..88c407f 100644
--- a/spec/lib/optional_object_spec.rb
+++ b/spec/lib/optional_object_spec.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 require 'spec_helper'
 
 describe GrapeSwagger::DocMethods::OptionalObject do
diff --git a/spec/lib/parse_params_spec.rb b/spec/lib/parse_params_spec.rb
index cca9a64..8884317 100644
--- a/spec/lib/parse_params_spec.rb
+++ b/spec/lib/parse_params_spec.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 require 'spec_helper'
 
 describe GrapeSwagger::DocMethods::ParseParams do
diff --git a/spec/lib/path_string_spec.rb b/spec/lib/path_string_spec.rb
index 21b134a..7380bce 100644
--- a/spec/lib/path_string_spec.rb
+++ b/spec/lib/path_string_spec.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 require 'spec_helper'
 
 describe GrapeSwagger::DocMethods::PathString do
diff --git a/spec/lib/produces_consumes_spec.rb b/spec/lib/produces_consumes_spec.rb
index 3f47c27..2239ec3 100644
--- a/spec/lib/produces_consumes_spec.rb
+++ b/spec/lib/produces_consumes_spec.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 require 'spec_helper'
 
 describe GrapeSwagger::DocMethods::ProducesConsumes do
diff --git a/spec/lib/tag_name_description_spec.rb b/spec/lib/tag_name_description_spec.rb
index 72736c3..2df13d6 100644
--- a/spec/lib/tag_name_description_spec.rb
+++ b/spec/lib/tag_name_description_spec.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 require 'spec_helper'
 
 describe GrapeSwagger::DocMethods::TagNameDescription do
@@ -7,7 +8,7 @@ describe GrapeSwagger::DocMethods::TagNameDescription do
     subject { described_class.send(:build_memo, tag) }
 
     specify do
-      expect(subject.keys).to eql [:name, :description]
+      expect(subject.keys).to eql %i(name description)
       expect(subject).to eql(
         name: tag,
         description: "Operations about #{tag.pluralize}"
diff --git a/spec/lib/version_spec.rb b/spec/lib/version_spec.rb
index a5b0991..125ccbb 100644
--- a/spec/lib/version_spec.rb
+++ b/spec/lib/version_spec.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 require 'spec_helper'
 
 describe GrapeSwagger::DocMethods::Version do
@@ -8,7 +9,7 @@ describe GrapeSwagger::DocMethods::Version do
   describe 'grape 0.16.2 version' do
     let(:version) { '[:v1, :v2]' }
     it { is_expected.to be_a Array }
-    it { is_expected.to eql [:v1, :v2] }
+    it { is_expected.to eql %i(v1 v2) }
   end
 
   describe 'newer grape versions' do
@@ -19,9 +20,9 @@ describe GrapeSwagger::DocMethods::Version do
     end
 
     describe 'as Array' do
-      let(:version) { [:v1, :v2] }
+      let(:version) { %i(v1 v2) }
       it { is_expected.to be_a Array }
-      it { is_expected.to eql [:v1, :v2] }
+      it { is_expected.to eql %i(v1 v2) }
     end
   end
 end
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index 11627e0..5aaf100 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 require 'simplecov'
 require 'coveralls'
 
diff --git a/spec/support/empty_model_parser.rb b/spec/support/empty_model_parser.rb
index a6e73a7..bc3eeff 100644
--- a/spec/support/empty_model_parser.rb
+++ b/spec/support/empty_model_parser.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 class EmptyClass
 end
 
diff --git a/spec/support/grape_version.rb b/spec/support/grape_version.rb
index 16311d0..8e0008e 100644
--- a/spec/support/grape_version.rb
+++ b/spec/support/grape_version.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 class GrapeVersion
   class << self
     def current_version
diff --git a/spec/support/mock_parser.rb b/spec/support/mock_parser.rb
index 635ecda..6868122 100644
--- a/spec/support/mock_parser.rb
+++ b/spec/support/mock_parser.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 module GrapeSwagger
   class MockParser
     attr_reader :model
diff --git a/spec/support/model_parsers/entity_parser.rb b/spec/support/model_parsers/entity_parser.rb
index 5180aae..fdc3bc6 100644
--- a/spec/support/model_parsers/entity_parser.rb
+++ b/spec/support/model_parsers/entity_parser.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 RSpec.shared_context 'entity swagger example' do
   before :all do
     module Entities
diff --git a/spec/support/model_parsers/mock_parser.rb b/spec/support/model_parsers/mock_parser.rb
index 4ddfb31..0b236c4 100644
--- a/spec/support/model_parsers/mock_parser.rb
+++ b/spec/support/model_parsers/mock_parser.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 RSpec.shared_context 'mock swagger example' do
   before :all do
     module Entities
diff --git a/spec/support/model_parsers/representable_parser.rb b/spec/support/model_parsers/representable_parser.rb
index 6d26696..b3caf34 100644
--- a/spec/support/model_parsers/representable_parser.rb
+++ b/spec/support/model_parsers/representable_parser.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 require 'representable/json'
 
 RSpec.shared_context 'representable swagger example' do
diff --git a/spec/support/namespace_tags.rb b/spec/support/namespace_tags.rb
index a48bdc0..d31888f 100644
--- a/spec/support/namespace_tags.rb
+++ b/spec/support/namespace_tags.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 RSpec.shared_context 'namespace example' do
   before :all do
     module TheApi
diff --git a/spec/support/the_paths_definitions.rb b/spec/support/the_paths_definitions.rb
index 670a703..df4a754 100644
--- a/spec/support/the_paths_definitions.rb
+++ b/spec/support/the_paths_definitions.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 RSpec.shared_context 'the api paths/defs' do
   let(:paths) do
     {
diff --git a/spec/swagger_v2/api_swagger_v2_body_definitions_spec.rb b/spec/swagger_v2/api_swagger_v2_body_definitions_spec.rb
index 10fe516..e13ef5e 100644
--- a/spec/swagger_v2/api_swagger_v2_body_definitions_spec.rb
+++ b/spec/swagger_v2/api_swagger_v2_body_definitions_spec.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 require 'spec_helper'
 
 describe 'body parameter definitions' do
diff --git a/spec/swagger_v2/api_swagger_v2_definitions-models_spec.rb b/spec/swagger_v2/api_swagger_v2_definitions-models_spec.rb
index 4d1d00e..4018745 100644
--- a/spec/swagger_v2/api_swagger_v2_definitions-models_spec.rb
+++ b/spec/swagger_v2/api_swagger_v2_definitions-models_spec.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 require 'spec_helper'
 
 describe 'definitions/models' do
diff --git a/spec/swagger_v2/api_swagger_v2_detail_spec.rb b/spec/swagger_v2/api_swagger_v2_detail_spec.rb
index 60b4371..2254227 100644
--- a/spec/swagger_v2/api_swagger_v2_detail_spec.rb
+++ b/spec/swagger_v2/api_swagger_v2_detail_spec.rb
@@ -1,24 +1,25 @@
 # frozen_string_literal: true
+
 require 'spec_helper'
 
 def details
   <<-DETAILS
-# Burgers in Heaven
+    # Burgers in Heaven
 
-> A burger doesn't come for free
+    > A burger doesn't come for free
 
-If you want to reserve a burger in heaven, you have to do
-some crazy stuff on earth.
+    If you want to reserve a burger in heaven, you have to do
+    some crazy stuff on earth.
 
-```
-def do_good
-puts 'help people'
-end
-```
+    ```
+    def do_good
+    puts 'help people'
+    end
+    ```
 
-* _Will go to Heaven:_ Probably
-* _Will go to Hell:_ Probably not
-DETAILS
+    * _Will go to Heaven:_ Probably
+    * _Will go to Hell:_ Probably not
+  DETAILS
 end
 
 describe 'details' do
diff --git a/spec/swagger_v2/api_swagger_v2_extensions_spec.rb b/spec/swagger_v2/api_swagger_v2_extensions_spec.rb
index 75b512c..ed23572 100644
--- a/spec/swagger_v2/api_swagger_v2_extensions_spec.rb
+++ b/spec/swagger_v2/api_swagger_v2_extensions_spec.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 require 'spec_helper'
 
 describe 'extensions' do
diff --git a/spec/swagger_v2/api_swagger_v2_format-content_type_spec.rb b/spec/swagger_v2/api_swagger_v2_format-content_type_spec.rb
index 4bc6c4b..98600db 100644
--- a/spec/swagger_v2/api_swagger_v2_format-content_type_spec.rb
+++ b/spec/swagger_v2/api_swagger_v2_format-content_type_spec.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 require 'spec_helper'
 
 describe 'format, content_type' do
diff --git a/spec/swagger_v2/api_swagger_v2_global_configuration_spec.rb b/spec/swagger_v2/api_swagger_v2_global_configuration_spec.rb
index 59d667a..9ea9e90 100644
--- a/spec/swagger_v2/api_swagger_v2_global_configuration_spec.rb
+++ b/spec/swagger_v2/api_swagger_v2_global_configuration_spec.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 require 'spec_helper'
 
 describe 'global configuration stuff' do
diff --git a/spec/swagger_v2/api_swagger_v2_hash_and_array_spec.rb b/spec/swagger_v2/api_swagger_v2_hash_and_array_spec.rb
index bf7d20d..b595e45 100644
--- a/spec/swagger_v2/api_swagger_v2_hash_and_array_spec.rb
+++ b/spec/swagger_v2/api_swagger_v2_hash_and_array_spec.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 require 'spec_helper'
 
 describe 'document hash and array' do
diff --git a/spec/swagger_v2/api_swagger_v2_headers_spec.rb b/spec/swagger_v2/api_swagger_v2_headers_spec.rb
index a5b22e1..07aa60c 100644
--- a/spec/swagger_v2/api_swagger_v2_headers_spec.rb
+++ b/spec/swagger_v2/api_swagger_v2_headers_spec.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 require 'spec_helper'
 
 describe 'headers' do
diff --git a/spec/swagger_v2/api_swagger_v2_hide_documentation_path_spec.rb b/spec/swagger_v2/api_swagger_v2_hide_documentation_path_spec.rb
index 389c40a..c882c73 100644
--- a/spec/swagger_v2/api_swagger_v2_hide_documentation_path_spec.rb
+++ b/spec/swagger_v2/api_swagger_v2_hide_documentation_path_spec.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 require 'spec_helper'
 
 describe 'hide documentation path' do
diff --git a/spec/swagger_v2/api_swagger_v2_hide_param_spec.rb b/spec/swagger_v2/api_swagger_v2_hide_param_spec.rb
index 3d3497f..003f29a 100644
--- a/spec/swagger_v2/api_swagger_v2_hide_param_spec.rb
+++ b/spec/swagger_v2/api_swagger_v2_hide_param_spec.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 require 'spec_helper'
 
 describe 'hidden flag enables a single endpoint parameter to be excluded from the documentation' do
diff --git a/spec/swagger_v2/api_swagger_v2_ignore_defaults_spec.rb b/spec/swagger_v2/api_swagger_v2_ignore_defaults_spec.rb
index 8b87e82..4aa4fe2 100644
--- a/spec/swagger_v2/api_swagger_v2_ignore_defaults_spec.rb
+++ b/spec/swagger_v2/api_swagger_v2_ignore_defaults_spec.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 require 'spec_helper'
 
 describe 'swagger spec v2.0' do
diff --git a/spec/swagger_v2/api_swagger_v2_mounted_spec.rb b/spec/swagger_v2/api_swagger_v2_mounted_spec.rb
index c58dfd8..34ee43a 100644
--- a/spec/swagger_v2/api_swagger_v2_mounted_spec.rb
+++ b/spec/swagger_v2/api_swagger_v2_mounted_spec.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 require 'spec_helper'
 
 describe 'swagger spec v2.0' do
diff --git a/spec/swagger_v2/api_swagger_v2_param_type_body_nested_spec.rb b/spec/swagger_v2/api_swagger_v2_param_type_body_nested_spec.rb
index 3dc178a..c51f95b 100644
--- a/spec/swagger_v2/api_swagger_v2_param_type_body_nested_spec.rb
+++ b/spec/swagger_v2/api_swagger_v2_param_type_body_nested_spec.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 require 'spec_helper'
 
 describe 'moving body/formData Params to definitions' do
diff --git a/spec/swagger_v2/api_swagger_v2_param_type_body_spec.rb b/spec/swagger_v2/api_swagger_v2_param_type_body_spec.rb
index 13c14d1..568d598 100644
--- a/spec/swagger_v2/api_swagger_v2_param_type_body_spec.rb
+++ b/spec/swagger_v2/api_swagger_v2_param_type_body_spec.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 require 'spec_helper'
 
 describe 'setting of param type, such as `query`, `path`, `formData`, `body`, `header`' do
diff --git a/spec/swagger_v2/api_swagger_v2_param_type_spec.rb b/spec/swagger_v2/api_swagger_v2_param_type_spec.rb
index 95c04fd..315264e 100644
--- a/spec/swagger_v2/api_swagger_v2_param_type_spec.rb
+++ b/spec/swagger_v2/api_swagger_v2_param_type_spec.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 require 'spec_helper'
 
 describe 'setting of param type, such as `query`, `path`, `formData`, `body`, `header`' do
diff --git a/spec/swagger_v2/api_swagger_v2_request_params_fix_spec.rb b/spec/swagger_v2/api_swagger_v2_request_params_fix_spec.rb
index 8a9b1ae..e03d44a 100644
--- a/spec/swagger_v2/api_swagger_v2_request_params_fix_spec.rb
+++ b/spec/swagger_v2/api_swagger_v2_request_params_fix_spec.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 require 'spec_helper'
 
 describe 'additional parameter settings' do
diff --git a/spec/swagger_v2/api_swagger_v2_response_spec.rb b/spec/swagger_v2/api_swagger_v2_response_spec.rb
index 258cb61..7f3b5ac 100644
--- a/spec/swagger_v2/api_swagger_v2_response_spec.rb
+++ b/spec/swagger_v2/api_swagger_v2_response_spec.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 require 'spec_helper'
 
 describe 'response' do
diff --git a/spec/swagger_v2/api_swagger_v2_spec.rb b/spec/swagger_v2/api_swagger_v2_spec.rb
index 6ff9573..63ed2e2 100644
--- a/spec/swagger_v2/api_swagger_v2_spec.rb
+++ b/spec/swagger_v2/api_swagger_v2_spec.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 require 'spec_helper'
 
 describe 'swagger spec v2.0' do
diff --git a/spec/swagger_v2/api_swagger_v2_type-format_spec.rb b/spec/swagger_v2/api_swagger_v2_type-format_spec.rb
index cfcd585..ab44aa8 100644
--- a/spec/swagger_v2/api_swagger_v2_type-format_spec.rb
+++ b/spec/swagger_v2/api_swagger_v2_type-format_spec.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 require 'spec_helper'
 
 # mapping of parameter types
diff --git a/spec/swagger_v2/boolean_params_spec.rb b/spec/swagger_v2/boolean_params_spec.rb
index 6c705b7..b828691 100644
--- a/spec/swagger_v2/boolean_params_spec.rb
+++ b/spec/swagger_v2/boolean_params_spec.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 require 'spec_helper'
 
 describe 'Boolean Params' do
diff --git a/spec/swagger_v2/default_api_spec.rb b/spec/swagger_v2/default_api_spec.rb
index d4a9f4a..9ed272e 100644
--- a/spec/swagger_v2/default_api_spec.rb
+++ b/spec/swagger_v2/default_api_spec.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 require 'spec_helper'
 # require 'grape_version'
 
diff --git a/spec/swagger_v2/description_not_initialized.rb b/spec/swagger_v2/description_not_initialized.rb
index 8583668..8561bb3 100644
--- a/spec/swagger_v2/description_not_initialized.rb
+++ b/spec/swagger_v2/description_not_initialized.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 require 'spec_helper'
 
 describe 'details' do
diff --git a/spec/swagger_v2/endpoint_versioned_path_spec.rb b/spec/swagger_v2/endpoint_versioned_path_spec.rb
index e385452..3c9833a 100644
--- a/spec/swagger_v2/endpoint_versioned_path_spec.rb
+++ b/spec/swagger_v2/endpoint_versioned_path_spec.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 require 'spec_helper'
 
 describe 'Grape::Endpoint#path_and_definitions' do
diff --git a/spec/swagger_v2/errors_spec.rb b/spec/swagger_v2/errors_spec.rb
index b11ab54..f42eae4 100644
--- a/spec/swagger_v2/errors_spec.rb
+++ b/spec/swagger_v2/errors_spec.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 require 'spec_helper'
 
 describe 'Errors' do
diff --git a/spec/swagger_v2/float_api_spec.rb b/spec/swagger_v2/float_api_spec.rb
index 9119d7d..23b3a2c 100644
--- a/spec/swagger_v2/float_api_spec.rb
+++ b/spec/swagger_v2/float_api_spec.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 require 'spec_helper'
 
 describe 'Float Params' do
diff --git a/spec/swagger_v2/form_params_spec.rb b/spec/swagger_v2/form_params_spec.rb
index 226dc42..e562442 100644
--- a/spec/swagger_v2/form_params_spec.rb
+++ b/spec/swagger_v2/form_params_spec.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 require 'spec_helper'
 
 describe 'Form Params' do
@@ -34,7 +35,7 @@ describe 'Form Params' do
       params do
         requires :id, type: Integer, desc: 'id of item'
         requires :name, type: String, desc: 'name of item'
-        optional :conditions, type: Symbol, desc: 'conditions of item', values: [:one, :two]
+        optional :conditions, type: Symbol, desc: 'conditions of item', values: %i(one two)
       end
       post '/items/:id' do
         {}
diff --git a/spec/swagger_v2/grape-swagger_spec.rb b/spec/swagger_v2/grape-swagger_spec.rb
index 8578ddd..4a879fb 100644
--- a/spec/swagger_v2/grape-swagger_spec.rb
+++ b/spec/swagger_v2/grape-swagger_spec.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 require 'spec_helper'
 
 describe Grape::API do
diff --git a/spec/swagger_v2/hide_api_spec.rb b/spec/swagger_v2/hide_api_spec.rb
index 03f99ed..47e7681 100644
--- a/spec/swagger_v2/hide_api_spec.rb
+++ b/spec/swagger_v2/hide_api_spec.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 require 'spec_helper'
 
 describe 'a hide mounted api' do
diff --git a/spec/swagger_v2/host.rb b/spec/swagger_v2/host.rb
index b944cff..d8c2834 100644
--- a/spec/swagger_v2/host.rb
+++ b/spec/swagger_v2/host.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 require 'spec_helper'
 
 describe 'host in the swagger_doc' do
diff --git a/spec/swagger_v2/mounted_target_class_spec.rb b/spec/swagger_v2/mounted_target_class_spec.rb
index a671724..7292cbe 100644
--- a/spec/swagger_v2/mounted_target_class_spec.rb
+++ b/spec/swagger_v2/mounted_target_class_spec.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 require 'spec_helper'
 
 describe 'docs mounted separately from api' do
diff --git a/spec/swagger_v2/namespace_tags_prefix_spec.rb b/spec/swagger_v2/namespace_tags_prefix_spec.rb
index d253b3b..3c6d8f0 100644
--- a/spec/swagger_v2/namespace_tags_prefix_spec.rb
+++ b/spec/swagger_v2/namespace_tags_prefix_spec.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 require 'spec_helper'
 
 describe 'namespace tags check while using prefix and version' do
@@ -7,7 +8,7 @@ describe 'namespace tags check while using prefix and version' do
   before :all do
     module TheApi
       class NamespaceApi < Grape::API
-        version [:v1, :v2]
+        version %i(v1 v2)
       end
 
       class CascadingVersionApi < Grape::API
diff --git a/spec/swagger_v2/namespace_tags_spec.rb b/spec/swagger_v2/namespace_tags_spec.rb
index 97a29b1..abde1ad 100644
--- a/spec/swagger_v2/namespace_tags_spec.rb
+++ b/spec/swagger_v2/namespace_tags_spec.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 require 'spec_helper'
 
 describe 'namespace tags check' do
diff --git a/spec/swagger_v2/namespaced_api_spec.rb b/spec/swagger_v2/namespaced_api_spec.rb
index c2fab88..7909026 100644
--- a/spec/swagger_v2/namespaced_api_spec.rb
+++ b/spec/swagger_v2/namespaced_api_spec.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 require 'spec_helper'
 
 describe 'namespace' do
diff --git a/spec/swagger_v2/nicknamed_api_spec.rb b/spec/swagger_v2/nicknamed_api_spec.rb
index 13bba9c..ebda67a 100644
--- a/spec/swagger_v2/nicknamed_api_spec.rb
+++ b/spec/swagger_v2/nicknamed_api_spec.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 require 'spec_helper'
 
 describe 'a nicknamed mounted api' do
diff --git a/spec/swagger_v2/operation_id_api_spec.rb b/spec/swagger_v2/operation_id_api_spec.rb
index a315840..b3ffda8 100644
--- a/spec/swagger_v2/operation_id_api_spec.rb
+++ b/spec/swagger_v2/operation_id_api_spec.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 require 'spec_helper'
 
 describe 'an operation id api' do
diff --git a/spec/swagger_v2/param_multi_type_spec.rb b/spec/swagger_v2/param_multi_type_spec.rb
index 6f2e640..a9202ac 100644
--- a/spec/swagger_v2/param_multi_type_spec.rb
+++ b/spec/swagger_v2/param_multi_type_spec.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 require 'spec_helper'
 
 describe 'Params Multi Types' do
diff --git a/spec/swagger_v2/param_type_spec.rb b/spec/swagger_v2/param_type_spec.rb
index 0c9fb97..54ff9b9 100644
--- a/spec/swagger_v2/param_type_spec.rb
+++ b/spec/swagger_v2/param_type_spec.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 require 'spec_helper'
 
 describe 'Params Types' do
diff --git a/spec/swagger_v2/param_values_spec.rb b/spec/swagger_v2/param_values_spec.rb
index b8c122a..f2d72a3 100644
--- a/spec/swagger_v2/param_values_spec.rb
+++ b/spec/swagger_v2/param_values_spec.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 require 'spec_helper'
 # require 'grape_version'
 
diff --git a/spec/swagger_v2/params_array_collection_fromat_spec.rb b/spec/swagger_v2/params_array_collection_fromat_spec.rb
index 73f4f93..1472389 100644
--- a/spec/swagger_v2/params_array_collection_fromat_spec.rb
+++ b/spec/swagger_v2/params_array_collection_fromat_spec.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 require 'spec_helper'
 
 describe 'Group Array Params, using collection format' do
diff --git a/spec/swagger_v2/params_array_spec.rb b/spec/swagger_v2/params_array_spec.rb
index 55d939d..2de00b3 100644
--- a/spec/swagger_v2/params_array_spec.rb
+++ b/spec/swagger_v2/params_array_spec.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 require 'spec_helper'
 
 describe 'Group Params as Array' do
diff --git a/spec/swagger_v2/params_hash_spec.rb b/spec/swagger_v2/params_hash_spec.rb
index 0703a6c..73943f3 100644
--- a/spec/swagger_v2/params_hash_spec.rb
+++ b/spec/swagger_v2/params_hash_spec.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 require 'spec_helper'
 
 describe 'Group Params as Hash' do
diff --git a/spec/swagger_v2/params_nested_spec.rb b/spec/swagger_v2/params_nested_spec.rb
index 0d9dc9e..491fc72 100644
--- a/spec/swagger_v2/params_nested_spec.rb
+++ b/spec/swagger_v2/params_nested_spec.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 require 'spec_helper'
 
 describe 'nested group params' do
diff --git a/spec/swagger_v2/parent_less_namespace.rb b/spec/swagger_v2/parent_less_namespace.rb
index 3e28c6f..099de29 100644
--- a/spec/swagger_v2/parent_less_namespace.rb
+++ b/spec/swagger_v2/parent_less_namespace.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 require 'spec_helper'
 
 describe 'a parent less namespace' do
diff --git a/spec/swagger_v2/reference_entity.rb b/spec/swagger_v2/reference_entity.rb
index 4033fed..179159a 100644
--- a/spec/swagger_v2/reference_entity.rb
+++ b/spec/swagger_v2/reference_entity.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 require 'spec_helper'
 
 describe 'referenceEntity' do
diff --git a/spec/swagger_v2/security_requirement_spec.rb b/spec/swagger_v2/security_requirement_spec.rb
index ad94ebe..9c106d1 100644
--- a/spec/swagger_v2/security_requirement_spec.rb
+++ b/spec/swagger_v2/security_requirement_spec.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 require 'spec_helper'
 
 describe 'security requirement on endpoint method' do
diff --git a/spec/swagger_v2/simple_mounted_api_spec.rb b/spec/swagger_v2/simple_mounted_api_spec.rb
index a672290..5d04bc2 100644
--- a/spec/swagger_v2/simple_mounted_api_spec.rb
+++ b/spec/swagger_v2/simple_mounted_api_spec.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 require 'spec_helper'
 
 describe 'a simple mounted api' do
diff --git a/spec/version_spec.rb b/spec/version_spec.rb
index 72d2cc1..ed51348 100644
--- a/spec/version_spec.rb
+++ b/spec/version_spec.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 require 'spec_helper'
 
 describe GrapeSwagger do