diff --git a/Gemfile b/Gemfile
index 586a6bca0b..23c96364ff 100644
--- a/Gemfile
+++ b/Gemfile
@@ -2,7 +2,7 @@ source 'https://rubygems.org'
 
 gemspec
 
-gem 'rails', '~> 5.1.6'
+gem 'rails', '~> 5.2.0'
 
 # Profiling
 gem 'rack-mini-profiler', group: :development, require: false
diff --git a/spec/dummy/config/application.rb b/spec/dummy/config/application.rb
index 5dfc9570d1..95498c1d03 100644
--- a/spec/dummy/config/application.rb
+++ b/spec/dummy/config/application.rb
@@ -2,15 +2,17 @@
 
 require_relative 'boot'
 
+require "rails"
 # Pick the frameworks you want:
+require "active_model/railtie"
 require "active_record/railtie"
 require "action_controller/railtie"
 require "action_mailer/railtie"
 require "action_view/railtie"
-require "sprockets/railtie"
 # require "active_job/railtie"
 # require "action_cable/engine"
 # require "rails/test_unit/railtie"
+require "sprockets/railtie"
 
 # Require the gems listed in Gemfile, including any gems
 # you've limited to :test, :development, or :production.
@@ -23,7 +25,8 @@ class Application < Rails::Application
     config.load_defaults 5.1
 
     # Settings in config/environments/* take precedence over those specified here.
-    # Application configuration should go into files in config/initializers
-    # -- all .rb files in that directory are automatically loaded.
+    # Application configuration can go into files in config/initializers
+    # -- all .rb files in that directory are automatically loaded after loading
+    # the framework and any gems in your application.
   end
 end
diff --git a/spec/dummy/config/environments/development.rb b/spec/dummy/config/environments/development.rb
index 170a50455b..3d0cb38c70 100644
--- a/spec/dummy/config/environments/development.rb
+++ b/spec/dummy/config/environments/development.rb
@@ -15,12 +15,13 @@
   config.consider_all_requests_local = true
 
   # Enable/disable caching. By default caching is disabled.
-  if Rails.root.join('tmp/caching-dev.txt').exist?
+  # Run rails dev:cache to toggle caching.
+  if Rails.root.join('tmp', 'caching-dev.txt').exist?
     config.action_controller.perform_caching = true
 
     config.cache_store = :memory_store
     config.public_file_server.headers = {
-      'Cache-Control' => "public, max-age=#{2.days.seconds.to_i}"
+      'Cache-Control' => "public, max-age=#{2.days.to_i}"
     }
   else
     config.action_controller.perform_caching = false
@@ -39,6 +40,9 @@
   # Raise an error on page load if there are pending migrations.
   config.active_record.migration_error = :page_load
 
+  # Highlight code that triggered database queries in logs.
+  config.active_record.verbose_query_logs = true
+
   # Debug mode disables concatenation and preprocessing of assets.
   # This option may cause significant delays in view rendering with a large
   # number of complex assets.
diff --git a/spec/dummy/config/environments/production.rb b/spec/dummy/config/environments/production.rb
index a4a340ea82..e011681c6f 100644
--- a/spec/dummy/config/environments/production.rb
+++ b/spec/dummy/config/environments/production.rb
@@ -16,10 +16,9 @@
   config.consider_all_requests_local       = false
   config.action_controller.perform_caching = true
 
-  # Attempt to read encrypted secrets from `config/secrets.yml.enc`.
-  # Requires an encryption key in `ENV["RAILS_MASTER_KEY"]` or
-  # `config/secrets.yml.key`.
-  config.read_encrypted_secrets = true
+  # Ensures that a master key has been made available in either ENV["RAILS_MASTER_KEY"]
+  # or in config/master.key. This key is used to decrypt credentials (and other encrypted files).
+  # config.require_master_key = true
 
   # Disable serving static files from the `/public` folder by default since
   # Apache or NGINX already handles this.
@@ -41,10 +40,6 @@
   # config.action_dispatch.x_sendfile_header = 'X-Sendfile' # for Apache
   # config.action_dispatch.x_sendfile_header = 'X-Accel-Redirect' # for NGINX
 
-  # Mount Action Cable outside main process or domain
-  # config.action_cable.mount_path = nil
-  # config.action_cable.url = 'wss://example.com/cable'
-  # config.action_cable.allowed_request_origins = [ 'http://example.com', /http:\/\/example.*/ ]
 
   # Force all access to the app over SSL, use Strict-Transport-Security, and use secure cookies.
   # config.force_ssl = true
@@ -62,6 +57,7 @@
   # Use a real queuing backend for Active Job (and separate queues per environment)
   # config.active_job.queue_adapter     = :resque
   # config.active_job.queue_name_prefix = "dummy_#{Rails.env}"
+
   config.action_mailer.perform_caching = false
 
   # Ignore bad email addresses and do not raise email delivery errors.
diff --git a/spec/dummy/config/environments/test.rb b/spec/dummy/config/environments/test.rb
index 5344748cf4..e2111b15ae 100644
--- a/spec/dummy/config/environments/test.rb
+++ b/spec/dummy/config/environments/test.rb
@@ -17,7 +17,7 @@
   # Configure public file server for tests with Cache-Control for performance.
   config.public_file_server.enabled = true
   config.public_file_server.headers = {
-    'Cache-Control' => 'public, max-age=3600'
+    'Cache-Control' => "public, max-age=#{1.hour.to_i}"
   }
 
   # Show full error reports and disable caching.
diff --git a/spec/dummy/config/initializers/application_controller_renderer.rb b/spec/dummy/config/initializers/application_controller_renderer.rb
index 6e2d5d2b87..6d56e43900 100644
--- a/spec/dummy/config/initializers/application_controller_renderer.rb
+++ b/spec/dummy/config/initializers/application_controller_renderer.rb
@@ -2,7 +2,9 @@
 
 # Be sure to restart your server when you modify this file.
 
-# ApplicationController.renderer.defaults.merge!(
-#   http_host: 'example.org',
-#   https: false
-# )
+# ActiveSupport::Reloader.to_prepare do
+#   ApplicationController.renderer.defaults.merge!(
+#     http_host: 'example.org',
+#     https: false
+#   )
+# end
diff --git a/spec/dummy/config/initializers/assets.rb b/spec/dummy/config/initializers/assets.rb
index 678efe9fa3..bcafccdd33 100644
--- a/spec/dummy/config/initializers/assets.rb
+++ b/spec/dummy/config/initializers/assets.rb
@@ -5,9 +5,10 @@
 # Version of your assets, change this if you want to expire all your assets.
 Rails.application.config.assets.version = '1.0'
 
-# Add additional assets to the asset load path
+# Add additional assets to the asset load path.
 # Rails.application.config.assets.paths << Emoji.images_path
 
 # Precompile additional assets.
-# application.js, application.css, and all non-JS/CSS in app/assets folder are already added.
-# Rails.application.config.assets.precompile += %w( search.js )
+# application.js, application.css, and all non-JS/CSS in the app/assets
+# folder are already added.
+# Rails.application.config.assets.precompile += %w( admin.js admin.css )
diff --git a/spec/dummy/config/initializers/content_security_policy.rb b/spec/dummy/config/initializers/content_security_policy.rb
new file mode 100644
index 0000000000..d3bcaa5ec8
--- /dev/null
+++ b/spec/dummy/config/initializers/content_security_policy.rb
@@ -0,0 +1,25 @@
+# Be sure to restart your server when you modify this file.
+
+# Define an application-wide content security policy
+# For further information see the following documentation
+# https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Security-Policy
+
+# Rails.application.config.content_security_policy do |policy|
+#   policy.default_src :self, :https
+#   policy.font_src    :self, :https, :data
+#   policy.img_src     :self, :https, :data
+#   policy.object_src  :none
+#   policy.script_src  :self, :https
+#   policy.style_src   :self, :https
+
+#   # Specify URI for violation reports
+#   # policy.report_uri "/csp-violation-report-endpoint"
+# end
+
+# If you are using UJS then enable automatic nonce generation
+# Rails.application.config.content_security_policy_nonce_generator = -> request { SecureRandom.base64(16) }
+
+# Report CSP violations to a specified URI
+# For further information see the following documentation:
+# https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Security-Policy-Report-Only
+# Rails.application.config.content_security_policy_report_only = true
diff --git a/spec/dummy/config/initializers/new_framework_defaults_5_1.rb b/spec/dummy/config/initializers/new_framework_defaults_5_1.rb
index b33ee806c6..3419f924ba 100644
--- a/spec/dummy/config/initializers/new_framework_defaults_5_1.rb
+++ b/spec/dummy/config/initializers/new_framework_defaults_5_1.rb
@@ -9,8 +9,8 @@
 # Read the Guide for Upgrading Ruby on Rails for more info on each option.
 
 # Make `form_with` generate non-remote forms.
-Rails.application.config.action_view.form_with_generates_remote_forms = false
+Rails.application.config.action_view.form_with_generates_remote_forms = true
 
 # Unknown asset fallback will return the path passed in when the given
 # asset is not present in the asset pipeline.
-# Rails.application.config.assets.unknown_asset_fallback = false
+Rails.application.config.assets.unknown_asset_fallback = true
diff --git a/spec/dummy/config/initializers/new_framework_defaults_5_2.rb b/spec/dummy/config/initializers/new_framework_defaults_5_2.rb
new file mode 100644
index 0000000000..c4406f9ae7
--- /dev/null
+++ b/spec/dummy/config/initializers/new_framework_defaults_5_2.rb
@@ -0,0 +1,30 @@
+# Be sure to restart your server when you modify this file.
+#
+# This file contains migration options to ease your Rails 5.2 upgrade.
+#
+# Once upgraded flip defaults one by one to migrate to the new default.
+#
+# Read the Guide for Upgrading Ruby on Rails for more info on each option.
+
+# Make Active Record use stable #cache_key alongside new #cache_version method.
+# This is needed for recyclable cache keys.
+Rails.application.config.active_record.cache_versioning = true
+
+# Use AES-256-GCM authenticated encryption for encrypted cookies.
+# Existing cookies will be converted on read then written with the new scheme.
+Rails.application.config.action_dispatch.use_authenticated_cookie_encryption = true
+
+# Use AES-256-GCM authenticated encryption as default cipher for encrypting messages
+# instead of AES-256-CBC, when use_authenticated_message_encryption is set to true.
+Rails.application.config.active_support.use_authenticated_message_encryption = true
+
+# Add default protection from forgery to ActionController::Base instead of in
+# ApplicationController.
+Rails.application.config.action_controller.default_protect_from_forgery = true
+
+# Store boolean values are in sqlite3 databases as 1 and 0 instead of 't' and
+# 'f' after migrating old data.
+Rails.application.config.active_record.sqlite3.represent_boolean_as_integer = true
+
+# Use SHA-1 instead of MD5 to generate non-sensitive digests, such as the ETag header.
+Rails.application.config.active_support.use_sha1_digests = true
diff --git a/spec/dummy/db/schema.rb b/spec/dummy/db/schema.rb
index 780115cfc8..83968b2f42 100644
--- a/spec/dummy/db/schema.rb
+++ b/spec/dummy/db/schema.rb
@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20180409171801) do
+ActiveRecord::Schema.define(version: 2018_04_09_171801) do
 
   create_table "alchemy_attachments", force: :cascade do |t|
     t.string "name"