diff --git a/Gemfile b/Gemfile
index 7ab06201..b25cf8ad 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', '~> 5.2.4.3'
+gem 'rails', '~> 5.2'
 
 # Use Puma as the app server
 gem 'puma', '~> 3.0'
@@ -81,7 +81,7 @@ 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 b4a25ecd..79a3d3dd 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -13,25 +13,25 @@ GEM
   remote: https://rails-assets.org/
   specs:
     Ascii85 (1.0.3)
-    actioncable (5.2.4.3)
-      actionpack (= 5.2.4.3)
+    actioncable (5.2.4.4)
+      actionpack (= 5.2.4.4)
       nio4r (~> 2.0)
       websocket-driver (>= 0.6.1)
-    actionmailer (5.2.4.3)
-      actionpack (= 5.2.4.3)
-      actionview (= 5.2.4.3)
-      activejob (= 5.2.4.3)
+    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 (5.2.4.3)
-      actionview (= 5.2.4.3)
-      activesupport (= 5.2.4.3)
+    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 (5.2.4.3)
-      activesupport (= 5.2.4.3)
+    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 (5.2.4.3)
-      activesupport (= 5.2.4.3)
+    activejob (5.2.4.4)
+      activesupport (= 5.2.4.4)
       globalid (>= 0.3.6)
-    activemodel (5.2.4.3)
-      activesupport (= 5.2.4.3)
-    activerecord (5.2.4.3)
-      activemodel (= 5.2.4.3)
-      activesupport (= 5.2.4.3)
+    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 (5.2.4.3)
-      actionpack (= 5.2.4.3)
-      activerecord (= 5.2.4.3)
+    activestorage (5.2.4.4)
+      actionpack (= 5.2.4.4)
+      activerecord (= 5.2.4.4)
       marcel (~> 0.3.1)
-    activesupport (5.2.4.3)
+    activesupport (5.2.4.4)
       concurrent-ruby (~> 1.0, >= 1.0.2)
       i18n (>= 0.7, < 2)
       minitest (~> 5.1)
@@ -111,7 +111,7 @@ 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)
@@ -120,12 +120,12 @@ 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 (1.1.6)
+    concurrent-ruby (1.1.7)
+    connection_pool (2.2.2)
     countable-rails (0.0.1)
       railties (>= 3.1)
     countries (3.0.0)
@@ -156,7 +156,7 @@ 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)
@@ -230,7 +230,7 @@ GEM
     htmlentities (4.3.4)
     http-cookie (1.0.3)
       domain_name (~> 0.5)
-    i18n (1.8.3)
+    i18n (1.8.5)
       concurrent-ruby (~> 1.0)
     i18n_data (0.8.0)
     inversion (1.1.1)
@@ -243,9 +243,9 @@ 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)
@@ -265,7 +265,7 @@ GEM
       rb-inotify (~> 0.9, >= 0.9.7)
       ruby_dep (~> 1.2)
     loggability (0.14.0)
-    loofah (2.6.0)
+    loofah (2.7.0)
       crass (~> 1.0.2)
       nokogiri (>= 1.5.9)
     lumberjack (1.0.12)
@@ -284,7 +284,7 @@ GEM
     mini_magick (4.9.5)
     mini_mime (1.0.2)
     mini_portile2 (2.4.0)
-    minitest (5.14.1)
+    minitest (5.14.2)
     momentjs-rails (2.20.1)
       railties (>= 3.1)
     monetize (1.9.2)
@@ -301,7 +301,7 @@ GEM
     multipart-post (2.1.1)
     nenv (0.3.0)
     netrc (0.11.0)
-    nio4r (2.5.2)
+    nio4r (2.5.4)
     nokogiri (1.10.10)
       mini_portile2 (~> 2.4.0)
     notiffany (0.1.1)
@@ -379,18 +379,18 @@ GEM
       ruby-openid (>= 2.1.8)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
-    rails (5.2.4.3)
-      actioncable (= 5.2.4.3)
-      actionmailer (= 5.2.4.3)
-      actionpack (= 5.2.4.3)
-      actionview (= 5.2.4.3)
-      activejob (= 5.2.4.3)
-      activemodel (= 5.2.4.3)
-      activerecord (= 5.2.4.3)
-      activestorage (= 5.2.4.3)
-      activesupport (= 5.2.4.3)
+    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 (= 5.2.4.3)
+      railties (= 5.2.4.4)
       sprockets-rails (>= 2.0.0)
     rails-assets-bootstrap (3.3.6)
       rails-assets-jquery (>= 1.9.1, < 3)
@@ -424,9 +424,9 @@ GEM
     rails-i18n (5.1.3)
       i18n (>= 0.7, < 2)
       railties (>= 5.0, < 6)
-    railties (5.2.4.3)
-      actionpack (= 5.2.4.3)
-      activesupport (= 5.2.4.3)
+    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)
@@ -524,11 +524,10 @@ 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)
@@ -543,7 +542,7 @@ 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)
@@ -575,7 +574,6 @@ 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)
@@ -648,7 +646,7 @@ DEPENDENCIES
   iso-639
   jquery-datatables
   jquery-rails
-  jquery-ui-rails (~> 4.2.1)
+  jquery-ui-rails (~> 6.0.1)
   json-schema
   leaflet-rails
   letter_opener
@@ -670,7 +668,7 @@ DEPENDENCIES
   prawn-qrcode
   prawn-rails
   puma (~> 3.0)
-  rails (~> 5.2.4.3)
+  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 cbd83bf4..ca8cf3da 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
diff --git a/app/controllers/admin/booths_controller.rb b/app/controllers/admin/booths_controller.rb
index b33ec103..dd4e5844 100644
--- a/app/controllers/admin/booths_controller.rb
+++ b/app/controllers/admin/booths_controller.rb
@@ -10,7 +10,7 @@ module Admin
       @booth_export_option = params[:booth_export_option]
       respond_to do |format|
         format.html
-        # Explicity call #to_json to avoid the use of EventSerializer
+        # Explicitly call #to_json to avoid the use of EventSerializer
         format.json { render json: Booth.where(state: :confirmed, program: @program).to_json }
         format.xlsx do
           response.headers['Content-Disposition'] = "attachment; filename=\"#{@file_name}.xlsx\""
diff --git a/app/controllers/admin/events_controller.rb b/app/controllers/admin/events_controller.rb
index 41feb8b1..b24882f3 100644
--- a/app/controllers/admin/events_controller.rb
+++ b/app/controllers/admin/events_controller.rb
@@ -24,7 +24,7 @@ module Admin
 
       respond_to do |format|
         format.html
-        # Explicity call #to_json to avoid the use of EventSerializer
+        # Explicitly call #to_json to avoid the use of EventSerializer
         format.json { render json: Event.where(state: :confirmed, program: @program).to_json }
         format.xlsx do
           response.headers['Content-Disposition'] = "attachment; filename=\"#{@file_name}.xlsx\""
diff --git a/app/controllers/admin/tracks_controller.rb b/app/controllers/admin/tracks_controller.rb
index a4f4c69e..511a4fa9 100644
--- a/app/controllers/admin/tracks_controller.rb
+++ b/app/controllers/admin/tracks_controller.rb
@@ -15,7 +15,7 @@ module Admin
 
       respond_to do |format|
         format.html
-        # Explicity call #to_json to avoid the use of EventSerializer
+        # Explicitly call #to_json to avoid the use of EventSerializer
         format.json { render json: Track.where(state: :confirmed, program: @program).to_json }
         format.xlsx do
           response.headers['Content-Disposition'] = "attachment; filename=\"#{@file_name}.xlsx\""
diff --git a/app/controllers/application_controller.rb b/app/controllers/application_controller.rb
index 31529b62..7b868e83 100644
--- a/app/controllers/application_controller.rb
+++ b/app/controllers/application_controller.rb
@@ -53,7 +53,7 @@ class ApplicationController < ActionController::Base
     Rails.logger.debug('IChain Record was not Unique!')
     sign_out(current_user)
     redirect_to root_path,
-                error: 'Your E-Mail adress is already registered at OSEM. Please contact the admin if you want to attach your openSUSE Account to OSEM!'
+                error: 'Your E-Mail address is already registered at OSEM. Please contact the admin if you want to attach your openSUSE Account to OSEM!'
   end
 
   rescue_from UserDisabled do
diff --git a/app/helpers/application_helper.rb b/app/helpers/application_helper.rb
index 3728c695..6984f304 100644
--- a/app/helpers/application_helper.rb
+++ b/app/helpers/application_helper.rb
@@ -69,7 +69,7 @@ module ApplicationHelper
     Comment.accessible_by(current_ability).find_since_last_login(user)
   end
 
-  # Recieves a PaperTrail::Version object
+  # Receives a PaperTrail::Version object
   # Outputs the list of attributes that were changed in the version (ignoring changes from one blank value to another)
   # Eg: If version.changeset = '{"title"=>[nil, "Premium"], "description"=>[nil, "Premium = Super cool"], "conference_id"=>[nil, 3]}'
   # Output will be 'title, description and conference'
diff --git a/lib/tasks/events_registrations.rake b/lib/tasks/events_registrations.rake
index a8f83360..171f4b25 100644
--- a/lib/tasks/events_registrations.rake
+++ b/lib/tasks/events_registrations.rake
@@ -1,7 +1,7 @@
 # frozen_string_literal: true
 
 namespace :events_registrations do
-  desc "Deletes dupicate entries"
+  desc "Deletes duplicate entries"
   task deduplicate: :environment do
     if ActiveRecord::Migrator.get_all_versions.include? 20160403214841
       duplicates = EventsRegistration.all.map { |er| er.id if er.valid? == false}.compact
diff --git a/spec/features/versions_spec.rb b/spec/features/versions_spec.rb
index 2988cc1c..eda602ac 100644
--- a/spec/features/versions_spec.rb
+++ b/spec/features/versions_spec.rb
@@ -373,7 +373,7 @@ feature 'Version' do
     EventsRegistration.create(registration: registration, event: event)
     EventsRegistration.first.update_attributes(attended: true)
     EventsRegistration.last.destroy
-    # Here registration is deleted to ensure the event registration related change still displays the asociated user's name
+    # Here registration is deleted to ensure the event registration related change still displays the associated user's name
     registration.destroy
 
     visit admin_revision_history_path
diff --git a/spec/models/conference_spec.rb b/spec/models/conference_spec.rb
index 81e7d406..64cc1aea 100755
--- a/spec/models/conference_spec.rb
+++ b/spec/models/conference_spec.rb
@@ -165,7 +165,7 @@ describe Conference do
   end
 
   describe '#get_submissions_data' do
-    it 'returns emtpy hash if there is no cfp or events' do
+    it 'returns empty hash if there is no cfp or events' do
       expect(subject.get_submissions_data).to eq []
     end
 
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index b809992f..cc014774 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -73,9 +73,11 @@ RSpec.configure do |config|
   end
 
   Capybara.register_driver :chrome_headless do |app|
-    options = Selenium::WebDriver::Chrome::Options.new(
-      args: %w(headless disable-gpu window-size=1920x1080 no-sandbox)
-    )
+    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