diff --git a/.rubocop.yml b/.rubocop.yml
index f7996f0af4..9b7790015e 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -1,6 +1,8 @@
 inherit_from: .rubocop_todo.yml
 
-require: rubocop-rspec
+require:
+  - rubocop-rspec
+  - rubocop-rails
 
 AllCops:
   TargetRubyVersion: 2.5
diff --git a/Gemfile b/Gemfile
index f35722314a..c9d56f4cc4 100644
--- a/Gemfile
+++ b/Gemfile
@@ -43,7 +43,8 @@ group :test, :development do
   gem 'rack-console'
   gem 'rails-controller-testing'
   gem 'rspec-rails'
-  gem 'rubocop', '~> 0.65.0'
+  gem 'rubocop', '~> 0.74.0'
+  gem 'rubocop-rails'
   gem 'rubocop-rspec', '~> 1.32.0'
   gem 'simplecov'
   gem 'webmock'
diff --git a/Gemfile.lock b/Gemfile.lock
index 43848f0077..6b4f60d1ee 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -266,9 +266,7 @@ GEM
     parallel (1.17.0)
     parser (2.6.4.0)
       ast (~> 2.4.0)
-    powerpack (0.1.2)
     progressbar (1.10.1)
-    psych (3.1.0)
     public_suffix (4.0.1)
     puma (3.12.1)
     rack (2.0.7)
@@ -355,15 +353,16 @@ GEM
       rspec-mocks (~> 3.8.0)
       rspec-support (~> 3.8.0)
     rspec-support (3.8.2)
-    rubocop (0.65.0)
+    rubocop (0.74.0)
       jaro_winkler (~> 1.5.1)
       parallel (~> 1.10)
-      parser (>= 2.5, != 2.5.1.1)
-      powerpack (~> 0.1)
-      psych (>= 3.1.0)
+      parser (>= 2.6)
       rainbow (>= 2.2.2, < 4.0)
       ruby-progressbar (~> 1.7)
-      unicode-display_width (~> 1.4.0)
+      unicode-display_width (>= 1.4.0, < 1.7)
+    rubocop-rails (2.3.2)
+      rack (>= 1.1)
+      rubocop (>= 0.72.0)
     rubocop-rspec (1.32.0)
       rubocop (>= 0.60.0)
     ruby-cache (0.3.0)
@@ -423,7 +422,7 @@ GEM
     unf (0.1.4)
       unf_ext
     unf_ext (0.0.7.6)
-    unicode-display_width (1.4.1)
+    unicode-display_width (1.6.0)
     uuidtools (2.1.5)
     webmock (3.7.1)
       addressable (>= 2.3.6)
@@ -463,7 +462,8 @@ DEPENDENCIES
   rails-controller-testing
   rest-client
   rspec-rails
-  rubocop (~> 0.65.0)
+  rubocop (~> 0.74.0)
+  rubocop-rails
   rubocop-rspec (~> 1.32.0)
   ruby-cache (~> 0.3.0)
   simplecov
diff --git a/app/controllers/application_controller.rb b/app/controllers/application_controller.rb
index ad0c85cfd6..74a6f00527 100644
--- a/app/controllers/application_controller.rb
+++ b/app/controllers/application_controller.rb
@@ -22,7 +22,7 @@ class ApplicationController < ActionController::API
   # Ensure a valid token is present, or renders "401: Not Authorized"
   def check_auth_token
     token = decoded_auth_token
-    return render json: { error: 'Not Authorized' }, status: 401 unless token
+    return render json: { error: 'Not Authorized' }, status: :unauthorized unless token
 
     Honeybadger.context(invoked_by: token[:sub])
   end
diff --git a/app/controllers/embargoes_controller.rb b/app/controllers/embargoes_controller.rb
index 154212d7b4..6d10c2ab28 100644
--- a/app/controllers/embargoes_controller.rb
+++ b/app/controllers/embargoes_controller.rb
@@ -11,6 +11,6 @@ def update
     @item.events.add_event('Embargo', params[:requesting_user], 'Embargo date modified')
     head :no_content
   rescue ArgumentError => e
-    render status: 422, plain: e.message
+    render status: :unprocessable_entity, plain: e.message
   end
 end
diff --git a/app/controllers/objects_controller.rb b/app/controllers/objects_controller.rb
index 768250f044..e908a3d50a 100644
--- a/app/controllers/objects_controller.rb
+++ b/app/controllers/objects_controller.rb
@@ -4,15 +4,15 @@ class ObjectsController < ApplicationController
   before_action :load_item, except: [:create]
 
   rescue_from(Dor::ParameterError) do |e|
-    render status: 400, plain: e.message
+    render status: :bad_request, plain: e.message
   end
 
   rescue_from(Dor::DuplicateIdError) do |e|
-    render status: 409, plain: e.message, location: object_location(e.pid)
+    render status: :conflict, plain: e.message, location: object_location(e.pid)
   end
 
   rescue_from(DublinCoreService::CrosswalkError) do |e|
-    render status: 500, plain: e.message
+    render status: :internal_server_error, plain: e.message
   end
 
   # Register new objects in DOR
@@ -21,14 +21,14 @@ def create
     begin
       reg_response = RegistrationService.create_from_request(create_params)
     rescue ArgumentError => e
-      return render status: 422, plain: e.message
+      return render status: :unprocessable_entity, plain: e.message
     end
     Rails.logger.info(reg_response)
     pid = reg_response[:pid]
 
     respond_to do |format|
-      format.all { render status: 201, location: object_location(pid), plain: Dor::RegistrationResponse.new(reg_response).to_txt }
-      format.json { render status: 201, location: object_location(pid), json: Dor::RegistrationResponse.new(reg_response) }
+      format.all { render status: :created, location: object_location(pid), plain: Dor::RegistrationResponse.new(reg_response).to_txt }
+      format.json { render status: :created, location: object_location(pid), json: Dor::RegistrationResponse.new(reg_response) }
     end
   end
 
@@ -62,7 +62,7 @@ def notify_goobi
     response = Dor::Goobi.new(@item).register
     proxy_rest_client_response(response)
   rescue RestClient::Conflict => e
-    render status: 409, plain: e.http_body
+    render status: :conflict, plain: e.http_body
   end
 
   # You can post a release tag as JSON in the body to add a release tag to an item.
@@ -80,7 +80,7 @@ def release_tags
       @item.save
       head :created
     else
-      render status: 400, plain: "A release attribute is required in the JSON, and its value must be either 'true' or 'false'. You sent '#{raw_params[:release]}'"
+      render status: :bad_request, plain: "A release attribute is required in the JSON, and its value must be either 'true' or 'false'. You sent '#{raw_params[:release]}'"
     end
   end
 
diff --git a/app/controllers/sdr_controller.rb b/app/controllers/sdr_controller.rb
index b10e09baa3..863a8496be 100644
--- a/app/controllers/sdr_controller.rb
+++ b/app/controllers/sdr_controller.rb
@@ -3,7 +3,7 @@
 class SdrController < ApplicationController
   def cm_inv_diff
     unless %w(all shelve preserve publish).include?(params[:subset].to_s)
-      render status: 400, plain: "Invalid subset value: #{params[:subset]}"
+      render status: :bad_request, plain: "Invalid subset value: #{params[:subset]}"
       return
     end
 
diff --git a/app/controllers/workspaces_controller.rb b/app/controllers/workspaces_controller.rb
index 486ddec080..9be1a54d30 100644
--- a/app/controllers/workspaces_controller.rb
+++ b/app/controllers/workspaces_controller.rb
@@ -3,7 +3,7 @@
 # Handles API routes for managing the DOR workspace
 class WorkspacesController < ApplicationController
   rescue_from(DruidTools::SameContentExistsError, DruidTools::DifferentContentExistsError) do |e|
-    render status: 409, plain: e.message
+    render status: :conflict, plain: e.message
   end
 
   # POST /v1/objects/:druid/workspace
diff --git a/spec/services/cleanup_service_spec.rb b/spec/services/cleanup_service_spec.rb
index 9c8ee8d639..5e15614c03 100644
--- a/spec/services/cleanup_service_spec.rb
+++ b/spec/services/cleanup_service_spec.rb
@@ -24,8 +24,8 @@
     workitem_pathname.rmtree if workitem_pathname.exist?
     export_pathname = Pathname(Settings.cleanup.local_export_home)
     export_pathname.rmtree if export_pathname.exist?
-    bag_pathname            = export_pathname.join(druid.split(':').last)
-    tarfile_pathname        = export_pathname.join(bag_pathname + '.tar')
+    bag_pathname = export_pathname.join(druid.split(':').last)
+    tarfile_pathname = export_pathname.join(bag_pathname + '.tar')
 
     workitem_pathname.join('content').mkpath
     workitem_pathname.join('temp').mkpath
diff --git a/spec/services/public_desc_metadata_service_spec.rb b/spec/services/public_desc_metadata_service_spec.rb
index c10fb20a29..089073e203 100644
--- a/spec/services/public_desc_metadata_service_spec.rb
+++ b/spec/services/public_desc_metadata_service_spec.rb
@@ -118,7 +118,7 @@
         doc = Nokogiri::XML(xml)
         expect(doc.encoding).to eq('UTF-8')
         expect(doc.xpath('//comment()').size).to eq 0
-        collections      = doc.search('//mods:relatedItem/mods:typeOfResource[@collection=\'yes\']')
+        collections = doc.search('//mods:relatedItem/mods:typeOfResource[@collection=\'yes\']')
         collection_title = doc.search('//mods:relatedItem/mods:titleInfo/mods:title')
         collection_uri   = doc.search('//mods:relatedItem/mods:location/mods:url')
         expect(collections.length).to eq 1
@@ -147,7 +147,7 @@
 
       it 'handles mods as the default namespace' do
         doc = Nokogiri::XML(xml)
-        collections      = doc.search('//xmlns:relatedItem/xmlns:typeOfResource[@collection=\'yes\']')
+        collections = doc.search('//xmlns:relatedItem/xmlns:typeOfResource[@collection=\'yes\']')
         collection_title = doc.search('//xmlns:relatedItem/xmlns:titleInfo/xmlns:title')
         collection_uri   = doc.search('//xmlns:relatedItem/xmlns:location/xmlns:url')
         expect(collections.length).to eq 1