diff --git a/.rubocop-https---relaxed-ruby-style-rubocop-yml b/.rubocop-https---relaxed-ruby-style-rubocop-yml
new file mode 100644
index 0000000..d88ecd1
--- /dev/null
+++ b/.rubocop-https---relaxed-ruby-style-rubocop-yml
@@ -0,0 +1,174 @@
+# Relaxed.Ruby.Style
+## Version 2.4
+
+Style/Alias:
+  Enabled: false
+  StyleGuide: https://relaxed.ruby.style/#stylealias
+
+Style/AsciiComments:
+  Enabled: false
+  StyleGuide: https://relaxed.ruby.style/#styleasciicomments
+
+Style/BeginBlock:
+  Enabled: false
+  StyleGuide: https://relaxed.ruby.style/#stylebeginblock
+
+Style/BlockDelimiters:
+  Enabled: false
+  StyleGuide: https://relaxed.ruby.style/#styleblockdelimiters
+
+Style/CommentAnnotation:
+  Enabled: false
+  StyleGuide: https://relaxed.ruby.style/#stylecommentannotation
+
+Style/Documentation:
+  Enabled: false
+  StyleGuide: https://relaxed.ruby.style/#styledocumentation
+
+Layout/DotPosition:
+  Enabled: false
+  StyleGuide: https://relaxed.ruby.style/#layoutdotposition
+
+Style/DoubleNegation:
+  Enabled: false
+  StyleGuide: https://relaxed.ruby.style/#styledoublenegation
+
+Style/EndBlock:
+  Enabled: false
+  StyleGuide: https://relaxed.ruby.style/#styleendblock
+
+Style/FormatString:
+  Enabled: false
+  StyleGuide: https://relaxed.ruby.style/#styleformatstring
+
+Style/IfUnlessModifier:
+  Enabled: false
+  StyleGuide: https://relaxed.ruby.style/#styleifunlessmodifier
+
+Style/Lambda:
+  Enabled: false
+  StyleGuide: https://relaxed.ruby.style/#stylelambda
+
+Style/ModuleFunction:
+  Enabled: false
+  StyleGuide: https://relaxed.ruby.style/#stylemodulefunction
+
+Style/MultilineBlockChain:
+  Enabled: false
+  StyleGuide: https://relaxed.ruby.style/#stylemultilineblockchain
+
+Style/NegatedIf:
+  Enabled: false
+  StyleGuide: https://relaxed.ruby.style/#stylenegatedif
+
+Style/NegatedWhile:
+  Enabled: false
+  StyleGuide: https://relaxed.ruby.style/#stylenegatedwhile
+
+Style/NumericPredicate:
+  Enabled: false
+  StyleGuide: https://relaxed.ruby.style/#stylenumericpredicate
+
+Style/ParallelAssignment:
+  Enabled: false
+  StyleGuide: https://relaxed.ruby.style/#styleparallelassignment
+
+Style/PercentLiteralDelimiters:
+  Enabled: false
+  StyleGuide: https://relaxed.ruby.style/#stylepercentliteraldelimiters
+
+Style/PerlBackrefs:
+  Enabled: false
+  StyleGuide: https://relaxed.ruby.style/#styleperlbackrefs
+
+Style/Semicolon:
+  Enabled: false
+  StyleGuide: https://relaxed.ruby.style/#stylesemicolon
+
+Style/SignalException:
+  Enabled: false
+  StyleGuide: https://relaxed.ruby.style/#stylesignalexception
+
+Style/SingleLineBlockParams:
+  Enabled: false
+  StyleGuide: https://relaxed.ruby.style/#stylesinglelineblockparams
+
+Style/SingleLineMethods:
+  Enabled: false
+  StyleGuide: https://relaxed.ruby.style/#stylesinglelinemethods
+
+Layout/SpaceBeforeBlockBraces:
+  Enabled: false
+  StyleGuide: https://relaxed.ruby.style/#layoutspacebeforeblockbraces
+
+Layout/SpaceInsideParens:
+  Enabled: false
+  StyleGuide: https://relaxed.ruby.style/#layoutspaceinsideparens
+
+Style/SpecialGlobalVars:
+  Enabled: false
+  StyleGuide: https://relaxed.ruby.style/#stylespecialglobalvars
+
+Style/StringLiterals:
+  Enabled: false
+  StyleGuide: https://relaxed.ruby.style/#stylestringliterals
+
+Style/TrailingCommaInArguments:
+  Enabled: false
+  StyleGuide: https://relaxed.ruby.style/#styletrailingcommainarguments
+
+Style/TrailingCommaInArrayLiteral:
+  Enabled: false
+  StyleGuide: https://relaxed.ruby.style/#styletrailingcommainarrayliteral
+
+Style/TrailingCommaInHashLiteral:
+  Enabled: false
+  StyleGuide: https://relaxed.ruby.style/#styletrailingcommainhashliteral
+
+Style/SymbolArray:
+  Enabled: false
+  StyleGuide: http://relaxed.ruby.style/#stylesymbolarray
+
+Style/WhileUntilModifier:
+  Enabled: false
+  StyleGuide: https://relaxed.ruby.style/#stylewhileuntilmodifier
+
+Style/WordArray:
+  Enabled: false
+  StyleGuide: https://relaxed.ruby.style/#stylewordarray
+
+Lint/AmbiguousRegexpLiteral:
+  Enabled: false
+  StyleGuide: https://relaxed.ruby.style/#lintambiguousregexpliteral
+
+Lint/AssignmentInCondition:
+  Enabled: false
+  StyleGuide: https://relaxed.ruby.style/#lintassignmentincondition
+
+Metrics/AbcSize:
+  Enabled: false
+
+Metrics/BlockNesting:
+  Enabled: false
+
+Metrics/ClassLength:
+  Enabled: false
+
+Metrics/ModuleLength:
+  Enabled: false
+
+Metrics/CyclomaticComplexity:
+  Enabled: false
+
+Metrics/LineLength:
+  Enabled: false
+
+Metrics/MethodLength:
+  Enabled: false
+
+Metrics/ParameterLists:
+  Enabled: false
+
+Metrics/PerceivedComplexity:
+  Enabled: false
+
diff --git a/.rubocop.yml b/.rubocop.yml
index cd8d1a0..44d2a88 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -1,231 +1,38 @@
-# Relaxed.Ruby.Style
+inherit_from:
+  - .rubocop_todo.yml
+  - https://relaxed.ruby.style/rubocop.yml
 
-AllCops:
-  Exclude:
-    - 'spec/dummy/**/*'
-    - 'vendor/bundle/**/*'
-  TargetRubyVersion: 2.1
-
-# Sometimes I believe this reads better
-# This also causes spacing issues on multi-line fixes
-Style/BracesAroundHashParameters:
-  Enabled: false
-
-# We use class vars and will have to continue doing so for compatability
-Style/ClassVars:
-  Enabled: false
-
-# We need these names for backwards compatability
-Style/PredicateName:
-  Enabled: false
-
-Style/AccessorMethodName:
-  Enabled: false
-
-# This has been used for customization
-Style/MutableConstant:
-  Enabled: false
-
-Style/ClassAndModuleChildren:
-  Enabled: false
-
-Style/GuardClause:
-  Enabled: false
-
-Style/WordArray:
-  Enabled: false
-
-Style/ConditionalAssignment:
-  Enabled: false
-
-Performance/Count:
-  Enabled: false
-
-Style/RaiseArgs:
-  Enabled: false
-
-Style/OpMethod:
-  Enabled: false
-
-# We can use good judgement here
-Style/RegexpLiteral:
-  Enabled: false
-
-# Unicode comments are useful
-Style/AsciiComments:
-  Enabled: false
-
-Lint/EndAlignment:
-  Enabled: false
-
-Style/ElseAlignment:
-  Enabled: false
-
-Style/IndentationWidth:
-  Enabled: false
 
-Style/AlignParameters:
-  Enabled: false
 
-Style/ClosingParenthesisIndentation:
-  Enabled: false
-
-Style/MultilineMethodCallIndentation:
-  Enabled: false
-
-Style/IndentArray:
-  Enabled: false
-
-Style/IndentHash:
-  Enabled: false
+require: rubocop-rspec
 
-Style/AlignHash:
-  Enabled: false
-
-# From http://relaxed.ruby.style/
-
-Style/Alias:
-  Enabled: false
-  StyleGuide: http://relaxed.ruby.style/#stylealias
-
-Style/BeginBlock:
-  Enabled: false
-  StyleGuide: http://relaxed.ruby.style/#stylebeginblock
-
-Style/BlockDelimiters:
-  Enabled: false
-  StyleGuide: http://relaxed.ruby.style/#styleblockdelimiters
-
-Style/Documentation:
-  Enabled: false
-  StyleGuide: http://relaxed.ruby.style/#styledocumentation
-
-Style/DotPosition:
-  Enabled: false
-  StyleGuide: http://relaxed.ruby.style/#styledotposition
-
-Style/DoubleNegation:
-  Enabled: false
-  StyleGuide: http://relaxed.ruby.style/#styledoublenegation
-
-Style/EndBlock:
-  Enabled: false
-  StyleGuide: http://relaxed.ruby.style/#styleendblock
-
-Style/FormatString:
-  Enabled: false
-  StyleGuide: http://relaxed.ruby.style/#styleformatstring
-
-Style/IfUnlessModifier:
-  Enabled: false
-  StyleGuide: http://relaxed.ruby.style/#styleifunlessmodifier
-
-Style/Lambda:
-  Enabled: false
-  StyleGuide: http://relaxed.ruby.style/#stylelambda
-
-Style/ModuleFunction:
-  Enabled: false
-  StyleGuide: http://relaxed.ruby.style/#stylemodulefunction
-
-Style/MultilineBlockChain:
-  Enabled: false
-  StyleGuide: http://relaxed.ruby.style/#stylemultilineblockchain
-
-Style/NegatedIf:
-  Enabled: false
-  StyleGuide: http://relaxed.ruby.style/#stylenegatedif
-
-Style/NegatedWhile:
-  Enabled: false
-  StyleGuide: http://relaxed.ruby.style/#stylenegatedwhile
-
-Style/ParallelAssignment:
-  Enabled: false
-  StyleGuide: http://relaxed.ruby.style/#styleparallelassignment
-
-Style/PercentLiteralDelimiters:
-  Enabled: false
-  StyleGuide: http://relaxed.ruby.style/#stylepercentliteraldelimiters
-
-Style/PerlBackrefs:
-  Enabled: false
-  StyleGuide: http://relaxed.ruby.style/#styleperlbackrefs
-
-Style/Semicolon:
-  Enabled: false
-  StyleGuide: http://relaxed.ruby.style/#stylesemicolon
-
-Style/SignalException:
-  Enabled: false
-  StyleGuide: http://relaxed.ruby.style/#stylesignalexception
-
-Style/SingleLineBlockParams:
-  Enabled: false
-  StyleGuide: http://relaxed.ruby.style/#stylesinglelineblockparams
-
-Style/SingleLineMethods:
-  Enabled: false
-  StyleGuide: http://relaxed.ruby.style/#stylesinglelinemethods
-
-Style/SpaceBeforeBlockBraces:
-  Enabled: false
-  StyleGuide: http://relaxed.ruby.style/#stylespacebeforeblockbraces
-
-Style/SpaceInsideParens:
-  Enabled: false
-  StyleGuide: http://relaxed.ruby.style/#stylespaceinsideparens
-
-Style/SpecialGlobalVars:
-  Enabled: false
-  StyleGuide: http://relaxed.ruby.style/#stylespecialglobalvars
-
-Style/StringLiterals:
-  Enabled: false
-  StyleGuide: http://relaxed.ruby.style/#stylestringliterals
-
-Style/SymbolProc:
-  Enabled: false
-
-Style/WhileUntilModifier:
-  Enabled: false
-  StyleGuide: http://relaxed.ruby.style/#stylewhileuntilmodifier
-
-Lint/AmbiguousRegexpLiteral:
-  Enabled: false
-  StyleGuide: http://relaxed.ruby.style/#lintambiguousregexpliteral
-
-Lint/AssignmentInCondition:
-  Enabled: false
-  StyleGuide: http://relaxed.ruby.style/#lintassignmentincondition
-
-Lint/HandleExceptions:
+AllCops:
+  TargetRubyVersion: 2.3
   Exclude:
-    - 'Rakefile'
-
-Metrics/AbcSize:
-  Enabled: false
+    - spec/dummy/**/*
 
-Metrics/BlockNesting:
+RSpec/ExampleLength:
   Enabled: false
 
-Metrics/ClassLength:
-  Enabled: false
+RSpec/MultipleExpectations:
+  Enabled: true
+  Exclude:
+    - spec/features/**/*
 
-Metrics/ModuleLength:
+Metrics/BlockLength:
   Enabled: false
 
-Metrics/CyclomaticComplexity:
-  Enabled: false
+Layout/IndentFirstArgument:
+  EnforcedStyle: consistent
 
-Metrics/LineLength:
-  Enabled: false
+Layout/CaseIndentation:
+  EnforcedStyle: end
 
-Metrics/MethodLength:
-  Enabled: false
+Layout/EndAlignment:
+  EnforcedStyleAlignWith: start_of_line
 
-Metrics/ParameterLists:
-  Enabled: false
+Layout/IndentFirstArrayElement:
+  EnforcedStyle: consistent
 
-Metrics/PerceivedComplexity:
-  Enabled: false
+Layout/IndentFirstHashElement:
+  EnforcedStyle: consistent
diff --git a/.rubocop_todo.yml b/.rubocop_todo.yml
new file mode 100644
index 0000000..3baa2bd
--- /dev/null
+++ b/.rubocop_todo.yml
@@ -0,0 +1,91 @@
+# This configuration was generated by
+# `rubocop --auto-gen-config`
+# on 2019-09-13 10:26:56 +0200 using RuboCop version 0.74.0.
+# 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: 1
+# Configuration parameters: Include.
+# Include: **/*.gemfile, **/Gemfile, **/gems.rb
+Bundler/DuplicatedGem:
+  Exclude:
+    - 'Gemfile'
+
+# Offense count: 1
+# Configuration parameters: Include.
+# Include: **/*.gemspec, 
+Gemspec/RequiredRubyVersion:
+  Exclude:
+    - 'solidus_quiet_logistics.gemspec'
+
+# Offense count: 1
+# Configuration parameters: AllowComments.
+Lint/HandleExceptions:
+  Exclude:
+    - 'Rakefile'
+
+# Offense count: 4
+# Configuration parameters: Prefixes.
+# Prefixes: when, with, without
+RSpec/ContextWording:
+  Exclude:
+    - 'spec/features/admin/order/return_authorization_spec.rb'
+    - 'spec/solidus_quiet_logistics/outbound/document/shipment_order_spec.rb'
+    - 'spec/support/quiet_logistics_setup.rb'
+
+# Offense count: 1
+RSpec/DescribeClass:
+  Exclude:
+    - 'spec/integration/solidus_quiet_logistics/inbound/inventory_summary_ready_spec.rb'
+
+# Offense count: 7
+RSpec/LetSetup:
+  Exclude:
+    - 'spec/features/admin/order/push_shipment_order_spec.rb'
+    - 'spec/features/admin/order/return_authorization_spec.rb'
+    - 'spec/features/admin/shipping_method/form_spec.rb'
+    - 'spec/solidus_quiet_logistics/outbound/document/rma_document_spec.rb'
+
+# Offense count: 18
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: have_received, receive
+RSpec/MessageSpies:
+  Exclude:
+    - 'spec/features/admin/order/return_authorization_spec.rb'
+    - 'spec/jobs/solidus_quiet_logistics/inbound/process_message_job_spec.rb'
+    - 'spec/solidus_quiet_logistics/inbound/document/rma_result_document_spec.rb'
+    - 'spec/solidus_quiet_logistics/inbound/document/shipment_order_cancel_ready_spec.rb'
+    - 'spec/solidus_quiet_logistics/inbound/message_processor_spec.rb'
+    - 'spec/solidus_quiet_logistics/inbound/queue_poller_spec.rb'
+
+# Offense count: 13
+# Configuration parameters: AggregateFailuresByDefault.
+RSpec/MultipleExpectations:
+  Max: 11
+
+# Offense count: 20
+# Configuration parameters: IgnoreSharedExamples.
+RSpec/NamedSubject:
+  Exclude:
+    - 'spec/integration/solidus_quiet_logistics/inbound/inventory_summary_ready_spec.rb'
+    - 'spec/jobs/solidus_quiet_logistics/inbound/process_message_job_spec.rb'
+    - 'spec/jobs/solidus_quiet_logistics/outbound/push_rma_document_job_spec.rb'
+    - 'spec/jobs/solidus_quiet_logistics/outbound/push_shipment_order_cancel_document_job_spec.rb'
+    - 'spec/jobs/solidus_quiet_logistics/outbound/push_shipment_order_document_job_spec.rb'
+    - 'spec/solidus_quiet_logistics/aws/credentials_spec.rb'
+    - 'spec/solidus_quiet_logistics/inbound/document/shipment_order_result_spec.rb'
+    - 'spec/solidus_quiet_logistics/inbound/message_processor_spec.rb'
+    - 'spec/solidus_quiet_logistics/inbound/queue_poller_spec.rb'
+    - 'spec/solidus_quiet_logistics/outbound/document_spec.rb'
+
+# Offense count: 8
+RSpec/NestedGroups:
+  Max: 4
+
+# Offense count: 1
+# Configuration parameters: MinBodyLength.
+Style/GuardClause:
+  Exclude:
+    - 'app/controllers/spree/admin/shipments_controller.rb'
diff --git a/Gemfile b/Gemfile
index 32acf9f..33adb5e 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 source 'https://rubygems.org'
 
 branch = ENV.fetch('SOLIDUS_BRANCH', 'master')
diff --git a/Rakefile b/Rakefile
index 1e92bfb..5525c81 100644
--- a/Rakefile
+++ b/Rakefile
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'bundler'
 
 Bundler::GemHelper.install_tasks
diff --git a/app/models/ql_message.rb b/app/models/ql_message.rb
index 287e6a5..8d18aa7 100644
--- a/app/models/ql_message.rb
+++ b/app/models/ql_message.rb
@@ -1,2 +1,4 @@
+# frozen_string_literal: true
+
 class QlMessage < ApplicationRecord
 end
diff --git a/config/routes.rb b/config/routes.rb
index 5d43774..c2203a9 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 Spree::Core::Engine.routes.draw do
   namespace :admin do
     resources :orders, only: [] do
diff --git a/db/migrate/20190122142209_add_pushed_to_spree_shipment.rb b/db/migrate/20190122142209_add_pushed_to_spree_shipment.rb
index 12b9305..9955d76 100644
--- a/db/migrate/20190122142209_add_pushed_to_spree_shipment.rb
+++ b/db/migrate/20190122142209_add_pushed_to_spree_shipment.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class AddPushedToSpreeShipment < SolidusSupport::Migration[4.2]
   def change
     add_column :spree_shipments, :pushed, :boolean, default: false
diff --git a/db/migrate/20190211133532_add_ql_cancellation_field_to_spree_shipment.rb b/db/migrate/20190211133532_add_ql_cancellation_field_to_spree_shipment.rb
index ca903da..c8d03e8 100644
--- a/db/migrate/20190211133532_add_ql_cancellation_field_to_spree_shipment.rb
+++ b/db/migrate/20190211133532_add_ql_cancellation_field_to_spree_shipment.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class AddQlCancellationFieldToSpreeShipment < SolidusSupport::Migration[4.2]
   def change
     add_column :spree_shipments, :ql_cancellation_sent, :datetime
diff --git a/db/migrate/20190605123221_add_priority_to_spree_shipping_method.rb b/db/migrate/20190605123221_add_priority_to_spree_shipping_method.rb
index 8db19ee..314f691 100644
--- a/db/migrate/20190605123221_add_priority_to_spree_shipping_method.rb
+++ b/db/migrate/20190605123221_add_priority_to_spree_shipping_method.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class AddPriorityToSpreeShippingMethod < SolidusSupport::Migration[4.2]
   def change
     add_column :spree_shipping_methods, :priority, :string, default: 'STANDARD'
diff --git a/db/migrate/20190611140852_add_pushed_to_spree_return_authorization.rb b/db/migrate/20190611140852_add_pushed_to_spree_return_authorization.rb
index a12fe15..b55ebed 100644
--- a/db/migrate/20190611140852_add_pushed_to_spree_return_authorization.rb
+++ b/db/migrate/20190611140852_add_pushed_to_spree_return_authorization.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class AddPushedToSpreeReturnAuthorization < SolidusSupport::Migration[4.2]
   def change
     add_column :spree_return_authorizations, :pushed, :boolean, default: false
@@ -5,7 +7,7 @@ def change
     reversible do |dir|
       dir.up do
         Spree::ReturnAuthorization.all.each do |return_authorization|
-          if (SolidusQuietLogistics.configuration.enabled&.call(return_authorization.order))
+          if SolidusQuietLogistics.configuration.enabled&.call(return_authorization.order)
             return_authorization.update!(pushed: true)
           end
         end
diff --git a/db/migrate/20190612082744_add_ql_rma_sent_timestamp_to_spree_inventory_unit.rb b/db/migrate/20190612082744_add_ql_rma_sent_timestamp_to_spree_inventory_unit.rb
index c31d087..7a17259 100644
--- a/db/migrate/20190612082744_add_ql_rma_sent_timestamp_to_spree_inventory_unit.rb
+++ b/db/migrate/20190612082744_add_ql_rma_sent_timestamp_to_spree_inventory_unit.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class AddQlRMASentTimestampToSpreeInventoryUnit < SolidusSupport::Migration[4.2]
   def change
     add_column :spree_inventory_units, :ql_rma_sent, :datetime
diff --git a/db/migrate/20190625073424_add_ql_rma_received_date_to_spree_inventory_unit.rb b/db/migrate/20190625073424_add_ql_rma_received_date_to_spree_inventory_unit.rb
index 05be4d9..94d0e89 100644
--- a/db/migrate/20190625073424_add_ql_rma_received_date_to_spree_inventory_unit.rb
+++ b/db/migrate/20190625073424_add_ql_rma_received_date_to_spree_inventory_unit.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class AddQlRMAReceivedDateToSpreeInventoryUnit < SolidusSupport::Migration[4.2]
   def change
     add_column :spree_inventory_units, :ql_rma_received, :datetime
diff --git a/db/migrate/20190806122254_create_ql_messages.rb b/db/migrate/20190806122254_create_ql_messages.rb
index d092848..4f6f151 100644
--- a/db/migrate/20190806122254_create_ql_messages.rb
+++ b/db/migrate/20190806122254_create_ql_messages.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class CreateQlMessages < SolidusSupport::Migration[4.2]
   def change
     create_table :ql_messages do |t|
diff --git a/lib/generators/solidus_quiet_logistics/install/install_generator.rb b/lib/generators/solidus_quiet_logistics/install/install_generator.rb
index 3307293..4344b70 100644
--- a/lib/generators/solidus_quiet_logistics/install/install_generator.rb
+++ b/lib/generators/solidus_quiet_logistics/install/install_generator.rb
@@ -1,7 +1,9 @@
+# frozen_string_literal: true
+
 module SolidusQuietLogistics
   module Generators
     class InstallGenerator < Rails::Generators::Base
-      source_root File.expand_path('../../templates', __FILE__)
+      source_root File.expand_path('../templates', __dir__)
 
       class_option :auto_run_migrations, type: :boolean, default: false
 
diff --git a/lib/generators/solidus_quiet_logistics/templates/resource/initializer.rb b/lib/generators/solidus_quiet_logistics/templates/resource/initializer.rb
index 6e5b52c..493ea74 100644
--- a/lib/generators/solidus_quiet_logistics/templates/resource/initializer.rb
+++ b/lib/generators/solidus_quiet_logistics/templates/resource/initializer.rb
@@ -1,5 +1,7 @@
+# frozen_string_literal: true
+
 SolidusQuietLogistics.configure do |config|
-  config.enabled = -> (order) { true }
+  config.enabled = ->(_order) { true }
   config.support_email = 'support@example.com'
 
   # Quiet Logistics configuration ( provided by QL )
diff --git a/lib/generators/solidus_quiet_logistics/templates/resource/ql-poller b/lib/generators/solidus_quiet_logistics/templates/resource/ql-poller
old mode 100644
new mode 100755
index 557d2a0..d1669d2
--- a/lib/generators/solidus_quiet_logistics/templates/resource/ql-poller
+++ b/lib/generators/solidus_quiet_logistics/templates/resource/ql-poller
@@ -1,4 +1,5 @@
 #!/usr/bin/env ruby
+# frozen_string_literal: true
 
 APP_PATH = File.expand_path('../config/application', __dir__)
 
diff --git a/lib/solidus_quiet_logistics.rb b/lib/solidus_quiet_logistics.rb
index 27fd22a..0814d66 100644
--- a/lib/solidus_quiet_logistics.rb
+++ b/lib/solidus_quiet_logistics.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'solidus_core'
 require 'deface'
 
@@ -44,7 +46,7 @@ class Configuration
 
   # AWS
   attr_accessor :aws_region, :aws_access_key_id, :aws_secret_access_key,
-    :aws_inbox_queue_url, :aws_inbox_bucket, :aws_outbox_bucket, :aws_outbox_queue_url
+                :aws_inbox_queue_url, :aws_inbox_bucket, :aws_outbox_bucket, :aws_outbox_queue_url
 
   # Custom fields
   attr_accessor :order_gift_message, :order_special_service_amount
diff --git a/lib/solidus_quiet_logistics/engine.rb b/lib/solidus_quiet_logistics/engine.rb
index d3d920f..aa4e96e 100644
--- a/lib/solidus_quiet_logistics/engine.rb
+++ b/lib/solidus_quiet_logistics/engine.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module SolidusQuietLogistics
   class Engine < Rails::Engine
     require 'spree/core'
diff --git a/lib/solidus_quiet_logistics/inbound/document/rma_result_document.rb b/lib/solidus_quiet_logistics/inbound/document/rma_result_document.rb
index f1e1aae..f909eb8 100644
--- a/lib/solidus_quiet_logistics/inbound/document/rma_result_document.rb
+++ b/lib/solidus_quiet_logistics/inbound/document/rma_result_document.rb
@@ -6,7 +6,7 @@ class Document < SolidusQuietLogistics::Document
       class RMAResultDocument < SolidusQuietLogistics::Inbound::Document
         class RMAItem
           attr_reader :line, :number, :quantity, :product_status, :order_number,
-            :notes
+                      :notes
 
           class << self
             def from_element(line)
@@ -22,7 +22,7 @@ def from_element(line)
           end
 
           def initialize(line:, number:, quantity:, product_status:,
-            order_number:, notes: '')
+                         order_number:, notes: '')
 
             @line = line
             @number = number
@@ -72,9 +72,9 @@ def process
         def return_authorization_items(return_items)
           return_items.flat_map do |item|
             return_authorization.return_items
-              .where(acceptance_status: 'pending')
-              .joins(inventory_unit: :variant)
-              .where(spree_variants: { sku: item.number }).limit(item.quantity)
+                                .where(acceptance_status: 'pending')
+                                .joins(inventory_unit: :variant)
+                                .where(spree_variants: { sku: item.number }).limit(item.quantity)
           end
         end
 
diff --git a/lib/solidus_quiet_logistics/inbound/document/shipment_order_cancel_ready.rb b/lib/solidus_quiet_logistics/inbound/document/shipment_order_cancel_ready.rb
index 5bed3fd..2b37549 100644
--- a/lib/solidus_quiet_logistics/inbound/document/shipment_order_cancel_ready.rb
+++ b/lib/solidus_quiet_logistics/inbound/document/shipment_order_cancel_ready.rb
@@ -17,7 +17,7 @@ def from_xml(body)
         end
 
         attr_reader :shipment_number, :cancellation_status, :date_cancelled,
-          :shipment
+                    :shipment
 
         def initialize(shipment_number:, cancellation_status:, date_cancelled: Time.now)
           @shipment_number = shipment_number
diff --git a/lib/solidus_quiet_logistics/inbound/document/shipment_order_result.rb b/lib/solidus_quiet_logistics/inbound/document/shipment_order_result.rb
index 5469369..0ebadaf 100644
--- a/lib/solidus_quiet_logistics/inbound/document/shipment_order_result.rb
+++ b/lib/solidus_quiet_logistics/inbound/document/shipment_order_result.rb
@@ -127,8 +127,8 @@ def send_shipment_emails(shipped_cartons)
 
           orders.each do |order|
             Spree::Config.carton_shipped_email_class
-              .multi_shipped_email(order: order, cartons: shipped_cartons)
-              .deliver_later
+                         .multi_shipped_email(order: order, cartons: shipped_cartons)
+                         .deliver_later
           end
         end
       end
diff --git a/lib/solidus_quiet_logistics/version.rb b/lib/solidus_quiet_logistics/version.rb
index ed74e37..493bebf 100644
--- a/lib/solidus_quiet_logistics/version.rb
+++ b/lib/solidus_quiet_logistics/version.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module SolidusQuietLogistics
   VERSION = '0.0.1'
 end
diff --git a/lib/tasks/ql_message.rake b/lib/tasks/ql_message.rake
index c9c5914..a2990a2 100644
--- a/lib/tasks/ql_message.rake
+++ b/lib/tasks/ql_message.rake
@@ -5,6 +5,6 @@ namespace :ql_message do
 
   task cancel_old_messages: :environment do
     QlMessage.where('created_at > ?', 90.days.ago)
-      .where(success: true).destroy_all
+             .where(success: true).destroy_all
   end
 end
diff --git a/solidus_quiet_logistics.gemspec b/solidus_quiet_logistics.gemspec
index db6f039..485a0a2 100644
--- a/solidus_quiet_logistics.gemspec
+++ b/solidus_quiet_logistics.gemspec
@@ -1,5 +1,6 @@
-# encoding: UTF-8
-$:.push File.expand_path('../lib', __FILE__)
+# frozen_string_literal: true
+
+$:.push File.expand_path('lib', __dir__)
 require 'solidus_quiet_logistics/version'
 
 Gem::Specification.new do |s|
@@ -17,21 +18,21 @@ Gem::Specification.new do |s|
   s.files = Dir["{app,config,db,lib}/**/*", 'LICENSE', 'Rakefile', 'README.md']
   s.test_files = Dir['test/**/*']
 
-  s.add_dependency 'solidus', ['>= 1.1', '< 3']
   s.add_dependency 'aws-sdk', '~> 3'
   s.add_dependency 'deface', '~> 1.3'
+  s.add_dependency 'solidus', ['>= 1.1', '< 3']
 
   s.add_development_dependency 'capybara'
-  s.add_development_dependency 'webdrivers'
   s.add_development_dependency 'coffee-rails'
-  s.add_development_dependency 'sass-rails'
   s.add_development_dependency 'database_cleaner'
   s.add_development_dependency 'factory_bot'
+  s.add_development_dependency 'ffaker'
+  s.add_development_dependency 'pry'
   s.add_development_dependency 'rspec-rails'
   s.add_development_dependency 'rubocop'
   s.add_development_dependency 'rubocop-rspec'
+  s.add_development_dependency 'sass-rails'
   s.add_development_dependency 'simplecov'
   s.add_development_dependency 'sqlite3'
-  s.add_development_dependency 'ffaker'
-  s.add_development_dependency 'pry'
+  s.add_development_dependency 'webdrivers'
 end
diff --git a/spec/features/admin/order/return_authorization_spec.rb b/spec/features/admin/order/return_authorization_spec.rb
index f21a8be..f9f4f91 100644
--- a/spec/features/admin/order/return_authorization_spec.rb
+++ b/spec/features/admin/order/return_authorization_spec.rb
@@ -11,7 +11,7 @@
   let(:shipment) { order.shipments.first }
   let(:quiet_logistics_enabled) { true }
 
-  def fill_in_rma(stock_location)
+  def fill_in_rma(_stock_location)
     expect(page).to have_css '[data-hook="admin_return_authorization_form_fields"]'
 
     find('#select-all').set true
@@ -31,7 +31,7 @@ def fill_in_rma(stock_location)
 
     allow(SolidusQuietLogistics.configuration)
       .to receive(:enabled)
-      .and_return(proc { |order| quiet_logistics_enabled })
+      .and_return(proc { |_order| quiet_logistics_enabled })
   end
 
   describe 'The create RMA button on the whole order' do
@@ -103,7 +103,7 @@ def fill_in_rma(stock_location)
         find_all('.shipment-rma').first.click
 
         expect(page).to have_selector('.return-items-table tbody tr',
-          count: shipment.inventory_units.count)
+                                      count: shipment.inventory_units.count)
         expect(SolidusQuietLogistics::Outbound::PushRMADocumentJob).to receive(:perform_later)
 
         fill_in_rma(shipment.stock_location)
diff --git a/spec/mailers/solidus_quiet_logistics/inbound/rma_mailer_spec.rb b/spec/mailers/solidus_quiet_logistics/inbound/rma_mailer_spec.rb
index 43aacf6..e74856d 100644
--- a/spec/mailers/solidus_quiet_logistics/inbound/rma_mailer_spec.rb
+++ b/spec/mailers/solidus_quiet_logistics/inbound/rma_mailer_spec.rb
@@ -9,13 +9,11 @@
   let(:return_items) do
     [
       create(:return_item,
-        inventory_unit: create(:inventory_unit, order: create(:order)),
-        return_authorization: return_authorization,
-      ),
+             inventory_unit: create(:inventory_unit, order: create(:order)),
+             return_authorization: return_authorization,),
       create(:return_item,
-        inventory_unit: create(:inventory_unit, order: create(:order)),
-        return_authorization: return_authorization,
-      ),
+             inventory_unit: create(:inventory_unit, order: create(:order)),
+             return_authorization: return_authorization,),
     ]
   end
 
diff --git a/spec/solidus_quiet_logistics/inbound/document/rma_result_document_spec.rb b/spec/solidus_quiet_logistics/inbound/document/rma_result_document_spec.rb
index dad5b2b..ceb8b41 100644
--- a/spec/solidus_quiet_logistics/inbound/document/rma_result_document_spec.rb
+++ b/spec/solidus_quiet_logistics/inbound/document/rma_result_document_spec.rb
@@ -80,21 +80,18 @@ def parse_items(document)
 
     let!(:good_return_item) do
       create(:return_item,
-        inventory_unit: create(:inventory_unit, order: create(:order), state: 'shipped'),
-        return_authorization: return_authorization,
-      )
+             inventory_unit: create(:inventory_unit, order: create(:order), state: 'shipped'),
+             return_authorization: return_authorization,)
     end
     let!(:damaged_return_item) do
       create(:return_item,
-        inventory_unit: create(:inventory_unit, order: create(:order), state: 'shipped'),
-        return_authorization: return_authorization,
-      )
+             inventory_unit: create(:inventory_unit, order: create(:order), state: 'shipped'),
+             return_authorization: return_authorization,)
     end
     let!(:incorrect_return_item) do
       create(:return_item,
-        inventory_unit: create(:inventory_unit, order: create(:order), state: 'shipped'),
-        return_authorization: return_authorization,
-      )
+             inventory_unit: create(:inventory_unit, order: create(:order), state: 'shipped'),
+             return_authorization: return_authorization,)
     end
 
     let(:rma_document_to_customer_mailer) { instance_double('ActionMailer::Delivery') }
@@ -114,7 +111,6 @@ def parse_items(document)
     end
 
     it 'refunds the correct return items and sends an email to the support for the incorrect return items' do
-
       expect(rma_document_to_customer_mailer).to receive(:deliver_later)
       expect(rma_document_to_suppport_mailer).to receive(:deliver_later)
 
diff --git a/spec/solidus_quiet_logistics/outbound/document/shipment_order_spec.rb b/spec/solidus_quiet_logistics/outbound/document/shipment_order_spec.rb
index e31fb1e..049d0b1 100644
--- a/spec/solidus_quiet_logistics/outbound/document/shipment_order_spec.rb
+++ b/spec/solidus_quiet_logistics/outbound/document/shipment_order_spec.rb
@@ -77,7 +77,7 @@
       before do
         allow(SolidusQuietLogistics.configuration)
           .to receive(:order_gift_message)
-          .and_return(proc { |order| gift_message })
+          .and_return(proc { |_order| gift_message })
       end
 
       it 'checks XML string is correct' do
@@ -87,7 +87,7 @@
 
     context 'without gift message' do
       it 'checks XML string is correct' do
-        expect(document).to eq(xml.gsub(/\s{4}<Comments><\/Comments>\n/, ""))
+        expect(document).to eq(xml.gsub(%r{\s{4}<Comments></Comments>\n}, ""))
       end
     end
 
@@ -95,7 +95,7 @@
       before do
         allow(SolidusQuietLogistics.configuration)
           .to receive(:order_special_service_amount)
-          .and_return(proc { |shipment| 'SIGNATURE' })
+          .and_return(proc { |_shipment| 'SIGNATURE' })
       end
 
       it 'XML document contains the special service node' do
diff --git a/spec/solidus_quiet_logistics/outbound/message_spec.rb b/spec/solidus_quiet_logistics/outbound/message_spec.rb
index 3082b2e..63551f5 100644
--- a/spec/solidus_quiet_logistics/outbound/message_spec.rb
+++ b/spec/solidus_quiet_logistics/outbound/message_spec.rb
@@ -43,7 +43,7 @@ def send_message(options)
       message.send_to_sqs
 
       expect(sqs_client.sent_messages).to match_array([
-        queue_url:  SolidusQuietLogistics.configuration.aws_outbox_queue_url,
+        queue_url: SolidusQuietLogistics.configuration.aws_outbox_queue_url,
         message_body: an_instance_of(String),
       ])
     end
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index 18a1fd4..41504d5 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # Run Coverage report
 require 'simplecov'
 SimpleCov.start do
@@ -13,7 +15,7 @@
 # Configure Rails Environment
 ENV['RAILS_ENV'] = 'test'
 
-require File.expand_path('../dummy/config/environment.rb', __FILE__)
+require File.expand_path('dummy/config/environment.rb', __dir__)
 
 require 'rspec/rails'
 require 'database_cleaner'
@@ -78,13 +80,13 @@
   end
 
   # Before each spec check if it is a Javascript test and switch between using database transactions or not where necessary.
-  config.before :each do
+  config.before do
     DatabaseCleaner.strategy = RSpec.current_example.metadata[:js] ? :truncation : :transaction
     DatabaseCleaner.start
   end
 
   # After each spec clean the database.
-  config.after :each do
+  config.after do
     DatabaseCleaner.clean
   end
 
diff --git a/spec/support/attribute_setup.rb b/spec/support/attribute_setup.rb
index e914dca..0168496 100644
--- a/spec/support/attribute_setup.rb
+++ b/spec/support/attribute_setup.rb
@@ -1,7 +1,7 @@
 # frozen_string_literal: true
 
 SolidusQuietLogistics.configure do |config|
-  config.enabled = -> (order) { true }
+  config.enabled = ->(_order) { true }
 
   config.client_id = 'client_id'
   config.business_unit = 'business_unit'