diff --git a/app/controllers/application_controller.rb b/app/controllers/application_controller.rb
index 0a4eca46..c9f93a30 100644
--- a/app/controllers/application_controller.rb
+++ b/app/controllers/application_controller.rb
@@ -25,7 +25,7 @@ class ApplicationController < ActionController::Base
                                      !request.xhr?) # don't store ajax calls
                                    session[:return_to] = request.fullpath
                                  end
-  end
+                               end
 
   def after_sign_in_path_for(_resource)
     if (can? :view, Conference) &&
diff --git a/app/controllers/users_controller.rb b/app/controllers/users_controller.rb
index 0bf44f49..55af84df 100644
--- a/app/controllers/users_controller.rb
+++ b/app/controllers/users_controller.rb
@@ -31,7 +31,9 @@ class UsersController < ApplicationController
   end
 
   # Somewhat of a hack: users/current/edit
+  # rubocop:disable Naming/MemoizedInstanceVariableName
   def load_user
     @user ||= (params[:id] && params[:id] != 'current' && User.find(params[:id]) || current_user)
   end
+  # rubocop:enable Naming/MemoizedInstanceVariableName
 end
diff --git a/app/helpers/application_helper.rb b/app/helpers/application_helper.rb
index 90b3fa2b..1c7f5da6 100644
--- a/app/helpers/application_helper.rb
+++ b/app/helpers/application_helper.rb
@@ -112,7 +112,7 @@ module ApplicationHelper
         concurrent_events << other_event_schedule.event
       end
     end
-    concurrent_events.sort_by { |event_schedule| event_schedule.room&.order }
+    concurrent_events.sort_by { |schedule| schedule.room&.order }
   end
 
   def speaker_links(event)
diff --git a/app/helpers/events_helper.rb b/app/helpers/events_helper.rb
index c920c16f..eebaa4fe 100644
--- a/app/helpers/events_helper.rb
+++ b/app/helpers/events_helper.rb
@@ -1,5 +1,7 @@
 # frozen_string_literal: true
 
+# TODO: Split this module into smaller modules
+# rubocop:disable Metrics/ModuleLength
 module EventsHelper
   ##
   # Includes functions related to events
@@ -193,7 +195,7 @@ module EventsHelper
     end
   end
 
-  def calendar_timestamp(timestamp, timezone)
+  def calendar_timestamp(timestamp, _timezone)
     timestamp = timestamp.in_time_zone('GMT')
     timestamp -= timestamp.utc_offset
     timestamp.strftime('%Y%m%dT%H%M%S')
@@ -221,7 +223,7 @@ module EventsHelper
   def calendar_event_text(event, event_schedule, conference)
     <<~TEXT
       #{conference.title} - #{event.title}
-      #{event_schedule.start_time.strftime("%Y %B %e - %H:%M")} #{event_schedule.timezone}
+      #{event_schedule.start_time.strftime('%Y %B %e - %H:%M')} #{event_schedule.timezone}
 
       More Info: #{conference_program_proposal_url(conference, event)}
       Join: #{event.url}
@@ -256,3 +258,4 @@ module EventsHelper
     end
   end
 end
+# rubocop:enable Metrics/ModuleLength
diff --git a/app/models/ability.rb b/app/models/ability.rb
index 9db7bacf..ec17e14c 100644
--- a/app/models/ability.rb
+++ b/app/models/ability.rb
@@ -68,6 +68,8 @@ class Ability
   end
 
   # Abilities for signed in users
+  # TODO: Refactor into multiple functions
+  # rubocop:disable Metrics/AbcSize
   def signed_in(user)
     # Abilities from not_signed_in user are also inherited
     not_signed_in
@@ -140,6 +142,7 @@ class Ability
       user == track.submitter && !(track.accepted? || track.confirmed?)
     end
   end
+  # rubocop:enable Metrics/AbcSize
 
   # Abilities for users with roles wandering around in non-admin views.
   def common_abilities_for_admins(user)
diff --git a/app/models/commercial.rb b/app/models/commercial.rb
index 1d39f9c5..64631052 100644
--- a/app/models/commercial.rb
+++ b/app/models/commercial.rb
@@ -30,7 +30,7 @@ class Commercial < ApplicationRecord
     begin
       resource = OEmbed::Providers.get(url, maxwidth: 560, maxheight: 315)
       { html: resource.html.html_safe }
-    rescue StandardError => exception
+    rescue StandardError
       { html: iframe_fallback(url) }
       # { error: exception.message }
     end
diff --git a/app/models/conference.rb b/app/models/conference.rb
index 3e197280..44224ab7 100644
--- a/app/models/conference.rb
+++ b/app/models/conference.rb
@@ -35,6 +35,7 @@
 #
 #  index_conferences_on_organization_id  (organization_id)
 #
+# rubocop:disable Metrics/ClassLength
 class Conference < ApplicationRecord
   include RevisionCount
   require 'uri'
@@ -1234,3 +1235,4 @@ class Conference < ApplicationRecord
     ]
   end
 end
+# rubocop:enable Metrics/ClassLength
diff --git a/app/models/user.rb b/app/models/user.rb
index 147c2fe6..9bd1bf80 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -305,7 +305,7 @@ class User < ApplicationRecord
   # TODO: Use a real authorization in the right place....
   def manages_volunteers?(conference)
     organizer_roles = get_roles['organizer']
-    organizer_roles&.include?(conference.short_title) # TODO or Volunteer Coorinator.
+    organizer_roles&.include?(conference.short_title) # TODO: or Volunteer Coorinator.
   end
 
   def registered
diff --git a/config/application.rb b/config/application.rb
index 874f4456..18f917aa 100644
--- a/config/application.rb
+++ b/config/application.rb
@@ -68,9 +68,11 @@ module Osem
 
     config.before_configuration do
       env_file = File.join(Rails.root, 'config', 'local_env.yml')
-      YAML.load(File.open(env_file)).each do |key, value|
-        ENV[key.to_s] = value
-      end if File.exists?(env_file)
+      if File.exist?(env_file)
+        YAML.safe_load(File.open(env_file)).each do |key, value|
+          ENV[key.to_s] = value
+        end
+      end
     end
   end
 end
diff --git a/config/puma.rb b/config/puma.rb
index 0d3b583f..c6f137da 100644
--- a/config/puma.rb
+++ b/config/puma.rb
@@ -46,9 +46,9 @@ end
 lowlevel_error_handler do |ex, env|
   Sentry.capture_exception(
     ex,
-    :message     => ex.message,
-    :extra       => { :puma => env },
-    :transaction => "Puma"
+    message:     ex.message,
+    extra:       { puma: env },
+    transaction: "Puma"
   )
   # note the below is just a Rack response
   [500, {}, ["An error has occurred, and engineers have been informed. Please reload the page. If you continue to have problems, contact conference@snap.berkeley.edu\n"]]
diff --git a/config/routes.rb b/config/routes.rb
index ef984ca9..362b762c 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -1,6 +1,6 @@
 Osem::Application.routes.draw do
 
-  mount LetterOpenerWeb::Engine, at: "/letter_opener" if Rails.env.development?
+  mount LetterOpenerWeb::Engine, at: '/letter_opener' if Rails.env.development?
 
   if ENV['OSEM_ICHAIN_ENABLED'] == 'true'
     devise_for :users, controllers: { registrations: :registrations }
diff --git a/db/migrate/20180409170433_add_visible_to_tickets.rb b/db/migrate/20180409170433_add_visible_to_tickets.rb
index 199f7a48..2286a065 100644
--- a/db/migrate/20180409170433_add_visible_to_tickets.rb
+++ b/db/migrate/20180409170433_add_visible_to_tickets.rb
@@ -2,7 +2,7 @@ class AddVisibleToTickets < ActiveRecord::Migration[5.0]
   def up
     add_column :tickets, :visible, :boolean, default: true
     Ticket.reset_column_information
-    Ticket.update_all(visible: true) # rubocop:disable Rails/SkipsModelValidations
+    Ticket.update_all(visible: true)
   end
 
   def down
diff --git a/lib/tasks/db.rake b/lib/tasks/db.rake
index 3c9cded7..bed74e53 100644
--- a/lib/tasks/db.rake
+++ b/lib/tasks/db.rake
@@ -13,24 +13,24 @@ namespace :db do
     end
   end
 
-  desc "Import a given file into the database"
+  desc 'Import a given file into the database'
   task :import, [:path] => :environment do |_t, args|
     dump_path = args.path
     connection_config = ActiveRecord::Base.connection_config
 
     case connection_config[:adapter]
-    when "postgresql"
+    when 'postgresql'
       system("PGPASSWORD=#{connection_config[:password]} pg_restore " \
-        "--verbose --clean --no-acl --no-owner " \
+        '--verbose --clean --no-acl --no-owner ' \
         "--username=#{connection_config[:username]} " \
         "-d #{connection_config[:database]} #{dump_path}")
-    when "mysql", "mysql2"
+    when 'mysql', 'mysql2'
       system("mysql -u #{connection_config[:username]} " \
         "-p#{connection_config[:password]} " \
         "#{connection_config[:database]} < #{dump_path}")
     else
-      raise NotImplementedError, "An importer hasn't been implemented for: " \
-        "#{connection_config[:adapter]}"
+      raise NotImplementedError.new("An importer hasn't been implemented for: " \
+        "#{connection_config[:adapter]}")
     end
   end
 end
diff --git a/lib/tasks/registrations.rake b/lib/tasks/registrations.rake
index f94bb3ae..709e13e0 100644
--- a/lib/tasks/registrations.rake
+++ b/lib/tasks/registrations.rake
@@ -1,17 +1,17 @@
 # frozen_string_literal: true
 
 namespace :registrations do
-  desc "Create missing registrations for those how have a registration ticket."
-  task :create_missing, [:conference] => :environment do |t, args|
+  desc 'Create missing registrations for those how have a registration ticket.'
+  task :create_missing, [:conference] => :environment do |_t, args|
 
-    fail 'Please supply a conference short name.' unless args.conference
+    raise 'Please supply a conference short name.' unless args.conference
 
     conf = Conference.find_by(short_title: args.conference)
     # Check if a user is found based on the supplied email address
-    fail "Coud not find conference #{args.conference}" unless conf
+    raise "Coud not find conference #{args.conference}" unless conf
 
     purchases = conf.ticket_purchases.where(ticket: conf.registration_tickets, paid: true)
-    unregistered = purchases.select { |tp| !conf.user_registered?(tp.user) }
+    unregistered = purchases.reject { |tp| conf.user_registered?(tp.user) }
     puts "Found #{unregistered.count} unregistered users for #{purchases.count} ticket purchases."
     puts "There are currently #{conf.participants.count} registered users."
 
@@ -19,17 +19,17 @@ namespace :registrations do
       puts "Creating registration for #{tp.user.email}"
       Registration.create(user: tp.user, conference: conf)
     end
-    puts "Done."
+    puts 'Done.'
   end
 
-  desc "Show User emails who have not paid, but did register"
-  task :list_unpaid, [:conference] => :environment do |t, args|
+  desc 'Show User emails who have not paid, but did register'
+  task :list_unpaid, [:conference] => :environment do |_t, args|
 
-    fail 'Please supply a conference short name.' unless args.conference
+    raise 'Please supply a conference short name.' unless args.conference
 
     conf = Conference.find_by(short_title: args.conference)
     # Check if a user is found based on the supplied email address
-    fail "Coud not find conference #{args.conference}" unless conf
+    raise "Coud not find conference #{args.conference}" unless conf
 
     registered = conf.participants
     unpaid = registered.select do |user|
@@ -41,6 +41,6 @@ namespace :registrations do
     unpaid.each do |user|
       puts "'#{user.name}'<#{user.email}>, "
     end
-    puts ""
+    puts ''
   end
 end
diff --git a/spec/features/commercials_spec.rb b/spec/features/commercials_spec.rb
index 13c46f3b..d6fc7f38 100644
--- a/spec/features/commercials_spec.rb
+++ b/spec/features/commercials_spec.rb
@@ -69,7 +69,7 @@ feature Commercial do
 
     scenario 'does not add an invalid commercial of an event', feature: true, js: true do
       # TODO-SNAPCON
-      skip("Snap!Con allows all materials to be saved.")
+      skip('Snap!Con allows all materials to be saved.')
       visit edit_conference_program_proposal_path(conference.short_title, event.id)
       click_link 'Materials'
       fill_in 'commercial_url', with: 'invalid_commercial_url'
diff --git a/spec/support/external_request.rb b/spec/support/external_request.rb
index b9a61e85..83eb47db 100644
--- a/spec/support/external_request.rb
+++ b/spec/support/external_request.rb
@@ -35,6 +35,6 @@ def mock_commercial_request
 end
 
 def mock_image_request
-  WebMock.stub_request(:post, "https://api.cloudinary.com/v1_1/snapcon/image/destroy")
+  WebMock.stub_request(:post, 'https://api.cloudinary.com/v1_1/snapcon/image/destroy')
     .to_return(status: 200, body: {}.to_json, headers: {})
 end
diff --git a/spec/support/omniauth_macros.rb b/spec/support/omniauth_macros.rb
index 25c6f039..2696f005 100644
--- a/spec/support/omniauth_macros.rb
+++ b/spec/support/omniauth_macros.rb
@@ -88,6 +88,10 @@ module OmniauthMacros
   # account is available for every supported omniauth provider.
   # These must be identical to the ones in /config/environments/development.rb
   # Remember to keep them in sync with development.rb
+  #
+  # Note that the method length check is disabled to allow for better formatting
+  # of the user params.
+  # rubocop:disable Metrics/MethodLength
   def mock_auth_accounts
     OmniAuth.config.mock_auth[:facebook] =
       OmniAuth::AuthHash.new(
@@ -164,4 +168,5 @@ module OmniauthMacros
                               }
                             )
   end
+  # rubocop:enable Metrics/MethodLength
 end