diff --git a/Gemfile b/Gemfile
index b281e1aa..4c4873cb 100644
--- a/Gemfile
+++ b/Gemfile
@@ -10,7 +10,7 @@ if Gem::Version.new(Bundler::VERSION) < Gem::Version.new('1.8.4')
 end
 
 # as web framework
-gem 'rails', '~> 5.2.3'
+gem 'rails', '~> 5.2'
 
 # Use Puma as the app server
 gem 'puma', '~> 3.0'
@@ -82,7 +82,7 @@ gem 'formtastic-bootstrap'
 
 # as the JavaScript library
 gem 'jquery-rails'
-gem 'jquery-ui-rails', '~> 4.2.1'
+gem 'jquery-ui-rails', '~> 6.0.1'
 
 # for languages validation
 gem 'iso-639'
diff --git a/Gemfile.lock b/Gemfile.lock
index f0b74151..4fd47a6e 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -13,25 +13,25 @@ GEM
   remote: https://rails-assets.org/
   specs:
     Ascii85 (1.0.3)
-    actioncable (5.2.3)
-      actionpack (= 5.2.3)
+    actioncable (5.2.4.4)
+      actionpack (= 5.2.4.4)
       nio4r (~> 2.0)
       websocket-driver (>= 0.6.1)
-    actionmailer (5.2.3)
-      actionpack (= 5.2.3)
-      actionview (= 5.2.3)
-      activejob (= 5.2.3)
+    actionmailer (5.2.4.4)
+      actionpack (= 5.2.4.4)
+      actionview (= 5.2.4.4)
+      activejob (= 5.2.4.4)
       mail (~> 2.5, >= 2.5.4)
       rails-dom-testing (~> 2.0)
-    actionpack (5.2.3)
-      actionview (= 5.2.3)
-      activesupport (= 5.2.3)
-      rack (~> 2.0)
+    actionpack (5.2.4.4)
+      actionview (= 5.2.4.4)
+      activesupport (= 5.2.4.4)
+      rack (~> 2.0, >= 2.0.8)
       rack-test (>= 0.6.3)
       rails-dom-testing (~> 2.0)
       rails-html-sanitizer (~> 1.0, >= 1.0.2)
-    actionview (5.2.3)
-      activesupport (= 5.2.3)
+    actionview (5.2.4.4)
+      activesupport (= 5.2.4.4)
       builder (~> 3.1)
       erubi (~> 1.4)
       rails-dom-testing (~> 2.0)
@@ -41,20 +41,20 @@ GEM
       activemodel (>= 4.1, < 6.1)
       case_transform (>= 0.2)
       jsonapi-renderer (>= 0.1.1.beta1, < 0.3)
-    activejob (5.2.3)
-      activesupport (= 5.2.3)
+    activejob (5.2.4.4)
+      activesupport (= 5.2.4.4)
       globalid (>= 0.3.6)
-    activemodel (5.2.3)
-      activesupport (= 5.2.3)
-    activerecord (5.2.3)
-      activemodel (= 5.2.3)
-      activesupport (= 5.2.3)
+    activemodel (5.2.4.4)
+      activesupport (= 5.2.4.4)
+    activerecord (5.2.4.4)
+      activemodel (= 5.2.4.4)
+      activesupport (= 5.2.4.4)
       arel (>= 9.0)
-    activestorage (5.2.3)
-      actionpack (= 5.2.3)
-      activerecord (= 5.2.3)
+    activestorage (5.2.4.4)
+      actionpack (= 5.2.4.4)
+      activerecord (= 5.2.4.4)
       marcel (~> 0.3.1)
-    activesupport (5.2.3)
+    activesupport (5.2.4.4)
       concurrent-ruby (~> 1.0, >= 1.0.2)
       i18n (>= 0.7, < 2)
       minitest (~> 5.1)
@@ -94,7 +94,7 @@ GEM
     bootstrap-switch-rails (3.0.2)
     bootstrap3-datetimepicker-rails (4.17.47)
       momentjs-rails (>= 2.8.1)
-    builder (3.2.3)
+    builder (3.2.4)
     byebug (11.0.1)
     cancancan (2.3.0)
     capybara (3.26.0)
@@ -115,7 +115,7 @@ GEM
       fastimage
     case_transform (0.2)
       activesupport
-    chartkick (3.3.0)
+    chartkick (3.4.0)
     childprocess (3.0.0)
     chronic (0.10.2)
     chunky_png (1.3.11)
@@ -124,12 +124,11 @@ GEM
       aws_cf_signer
       rest-client
     cocoon (1.2.14)
-    codecov (0.1.14)
+    codecov (0.2.11)
       json
       simplecov
-      url
     coderay (1.1.1)
-    concurrent-ruby (1.1.5)
+    concurrent-ruby (1.1.7)
     connection_pool (2.2.2)
     countable-rails (0.0.1)
       railties (>= 3.1)
@@ -142,7 +141,7 @@ GEM
       sort_alphabetical (~> 1.0)
     crack (0.4.3)
       safe_yaml (~> 1.0.0)
-    crass (1.0.5)
+    crass (1.0.6)
     daemons (1.3.1)
     dalli (2.7.10)
     dante (0.2.0)
@@ -161,7 +160,7 @@ GEM
     devise_ichain_authenticatable (0.3.2)
       devise (>= 2.2)
     diff-lcs (1.3)
-    docile (1.3.1)
+    docile (1.3.2)
     domain_name (0.5.20180417)
       unf (>= 0.0.5, < 1.0.0)
     dotenv (2.7.5)
@@ -235,7 +234,7 @@ GEM
     htmlentities (4.3.4)
     http-cookie (1.0.3)
       domain_name (~> 0.5)
-    i18n (1.7.0)
+    i18n (1.8.5)
       concurrent-ruby (~> 1.0)
     i18n_data (0.8.0)
     inversion (1.1.1)
@@ -252,9 +251,9 @@ GEM
       rails-dom-testing (>= 1, < 3)
       railties (>= 4.2.0)
       thor (>= 0.14, < 2.0)
-    jquery-ui-rails (4.2.1)
+    jquery-ui-rails (6.0.1)
       railties (>= 3.2.16)
-    json (2.3.0)
+    json (2.3.1)
     json-schema (2.8.1)
       addressable (>= 2.4)
     jsonapi-renderer (0.2.2)
@@ -270,7 +269,7 @@ GEM
       rb-inotify (~> 0.9, >= 0.9.7)
       ruby_dep (~> 1.2)
     loggability (0.14.0)
-    loofah (2.4.0)
+    loofah (2.7.0)
       crass (~> 1.0.2)
       nokogiri (>= 1.5.9)
     lumberjack (1.0.12)
@@ -282,14 +281,14 @@ GEM
     mime-types (3.2.2)
       mime-types-data (~> 3.2015)
     mime-types-data (3.2018.0812)
-    mimemagic (0.3.3)
+    mimemagic (0.3.5)
     mina (1.2.3)
       open4 (~> 1.3.4)
       rake
     mini_magick (4.9.5)
     mini_mime (1.0.2)
     mini_portile2 (2.4.0)
-    minitest (5.13.0)
+    minitest (5.14.2)
     momentjs-rails (2.20.1)
       railties (>= 3.1)
     monetize (1.9.2)
@@ -309,8 +308,8 @@ GEM
     net-http-persistent (3.0.1)
       connection_pool (~> 2.2)
     netrc (0.11.0)
-    nio4r (2.5.2)
-    nokogiri (1.10.8)
+    nio4r (2.5.4)
+    nokogiri (1.10.10)
       mini_portile2 (~> 2.4.0)
     notiffany (0.1.1)
       nenv (~> 0.1)
@@ -379,24 +378,24 @@ GEM
       slop (~> 3.4)
     public_suffix (3.1.1)
     puma (3.12.6)
-    rack (2.1.4)
+    rack (2.2.3)
     rack-openid (1.3.1)
       rack (>= 1.1.0)
       ruby-openid (>= 2.1.8)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
-    rails (5.2.3)
-      actioncable (= 5.2.3)
-      actionmailer (= 5.2.3)
-      actionpack (= 5.2.3)
-      actionview (= 5.2.3)
-      activejob (= 5.2.3)
-      activemodel (= 5.2.3)
-      activerecord (= 5.2.3)
-      activestorage (= 5.2.3)
-      activesupport (= 5.2.3)
+    rails (5.2.4.4)
+      actioncable (= 5.2.4.4)
+      actionmailer (= 5.2.4.4)
+      actionpack (= 5.2.4.4)
+      actionview (= 5.2.4.4)
+      activejob (= 5.2.4.4)
+      activemodel (= 5.2.4.4)
+      activerecord (= 5.2.4.4)
+      activestorage (= 5.2.4.4)
+      activesupport (= 5.2.4.4)
       bundler (>= 1.3.0)
-      railties (= 5.2.3)
+      railties (= 5.2.4.4)
       sprockets-rails (>= 2.0.0)
     rails-assets-bootstrap (3.3.6)
       rails-assets-jquery (>= 1.9.1, < 3)
@@ -430,9 +429,9 @@ GEM
     rails-i18n (5.1.3)
       i18n (>= 0.7, < 2)
       railties (>= 5.0, < 6)
-    railties (5.2.3)
-      actionpack (= 5.2.3)
-      activesupport (= 5.2.3)
+    railties (5.2.4.4)
+      actionpack (= 5.2.4.4)
+      activesupport (= 5.2.4.4)
       method_source
       rake (>= 0.8.7)
       thor (>= 0.19.0, < 2.0)
@@ -529,11 +528,10 @@ GEM
     shellany (0.0.1)
     shoulda-matchers (4.1.2)
       activesupport (>= 4.2.0)
-    simplecov (0.16.1)
+    simplecov (0.19.0)
       docile (~> 1.1)
-      json (>= 1.8, < 3)
-      simplecov-html (~> 0.10.0)
-    simplecov-html (0.10.2)
+      simplecov-html (~> 0.11)
+    simplecov-html (0.12.3)
     sixarm_ruby_unaccent (1.2.0)
     skylight (3.1.5)
       skylight-core (= 3.1.5)
@@ -548,7 +546,7 @@ GEM
     sprockets (3.7.2)
       concurrent-ruby (~> 1.0)
       rack (> 1, < 3)
-    sprockets-rails (3.2.1)
+    sprockets-rails (3.2.2)
       actionpack (>= 4.0)
       activesupport (>= 4.0)
       sprockets (>= 3.0.0)
@@ -562,7 +560,7 @@ GEM
       stripe (>= 2.0.3)
     sysexits (1.2.0)
     temple (0.8.0)
-    thor (0.20.3)
+    thor (1.0.1)
     thread_safe (0.3.6)
     tilt (2.0.9)
     timecop (0.9.1)
@@ -573,7 +571,7 @@ GEM
     turbolinks (5.2.1)
       turbolinks-source (~> 5.2)
     turbolinks-source (5.2.0)
-    tzinfo (1.2.5)
+    tzinfo (1.2.7)
       thread_safe (~> 0.1)
     uglifier (4.1.20)
       execjs (>= 0.3.0, < 3)
@@ -584,7 +582,6 @@ GEM
     unicode_utils (1.4.0)
     unobtrusive_flash (3.3.1)
       railties
-    url (0.3.2)
     warden (1.2.8)
       rack (>= 2.0.6)
     web-console (3.7.0)
@@ -600,7 +597,7 @@ GEM
       addressable (>= 2.3.6)
       crack (>= 0.3.2)
       hashdiff
-    websocket-driver (0.7.1)
+    websocket-driver (0.7.3)
       websocket-extensions (>= 0.1.0)
     websocket-extensions (0.1.5)
     whenever (0.10.0)
@@ -658,7 +655,7 @@ DEPENDENCIES
   iso-639
   jquery-datatables-rails
   jquery-rails
-  jquery-ui-rails (~> 4.2.1)
+  jquery-ui-rails (~> 6.0.1)
   json-schema
   leaflet-rails
   letter_opener
@@ -679,7 +676,7 @@ DEPENDENCIES
   prawn-qrcode
   prawn-rails
   puma (~> 3.0)
-  rails (~> 5.2.3)
+  rails (~> 5.2)
   rails-assets-bootstrap-markdown!
   rails-assets-bootstrap-select!
   rails-assets-date.format!
diff --git a/app/assets/javascripts/application.js b/app/assets/javascripts/application.js
index da958dc3..9917612b 100644
--- a/app/assets/javascripts/application.js
+++ b/app/assets/javascripts/application.js
@@ -13,8 +13,8 @@
 //= require jquery
 //= require jquery_ujs
 //= require jquery.mobile.custom.min
-//= require jquery.ui.draggable
-//= require jquery.ui.droppable
+//= require jquery-ui/widgets/draggable
+//= require jquery-ui/widgets/droppable
 //= require waypoints/jquery.waypoints
 //= require dataTables/jquery.dataTables
 //= require dataTables/bootstrap/3/jquery.dataTables.bootstrap
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index fe6bab9b..a68412da 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -78,12 +78,12 @@ RSpec.configure do |config|
   end
 
   Capybara.register_driver :chrome_headless do |app|
-    capabilities = Selenium::WebDriver::Remote::Capabilities.chrome(
-      chromeOptions: { args: %w(headless disable-gpu window-size=1920x1080 no-sandbox) }
-    )
-    Capybara::Selenium::Driver.new(
-      app, browser: :chrome, desired_capabilities: capabilities
-    )
+    options = ::Selenium::WebDriver::Chrome::Options.new
+    options.args << '--window-size=1920x1080'
+    options.args << '--headless'
+    options.args << '--no-sandbox'
+    options.args << '--disable-gpu'
+    Capybara::Selenium::Driver.new(app, browser: :chrome, options: options)
   end
 
   Capybara.default_max_wait_time = 10 # seconds