diff --git a/Gemfile b/Gemfile
index 7b74885..201edd5 100644
--- a/Gemfile
+++ b/Gemfile
@@ -7,9 +7,9 @@ end
 
 
 # Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
-gem 'rails', '~> 5.2.0'
+gem 'rails', '~> 7.0.Z'
 # Use sqlite3 as the database for Active Record
-gem 'sqlite3', '~> 1.3.0'
+gem 'sqlite3', '~> 1.4.2'
 # Use Puma as the app server
 gem 'puma'
 # Use SCSS for stylesheets
@@ -56,5 +56,8 @@ gem 'bootsnap'
 gem 'prawn'
 gem 'prawn-table'
 
-gem "rails-html-sanitizer", "= 1.0.3"
-gem "loofah", "= 2.0.3"
+gem "rails-html-sanitizer", "= 1.4.0"
+gem "loofah", "= 2.16.0"
+gem "mimemagic"
+
+gem "matrix", "~> 0.4.2"
diff --git a/Gemfile.lock b/Gemfile.lock
index 4aac59b..36b6651 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,181 +1,225 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    actioncable (5.2.2)
-      actionpack (= 5.2.2)
+    actioncable (7.0.8)
+      actionpack (= 7.0.8)
+      activesupport (= 7.0.8)
       nio4r (~> 2.0)
       websocket-driver (>= 0.6.1)
-    actionmailer (5.2.2)
-      actionpack (= 5.2.2)
-      actionview (= 5.2.2)
-      activejob (= 5.2.2)
+    actionmailbox (7.0.8)
+      actionpack (= 7.0.8)
+      activejob (= 7.0.8)
+      activerecord (= 7.0.8)
+      activestorage (= 7.0.8)
+      activesupport (= 7.0.8)
+      mail (>= 2.7.1)
+      net-imap
+      net-pop
+      net-smtp
+    actionmailer (7.0.8)
+      actionpack (= 7.0.8)
+      actionview (= 7.0.8)
+      activejob (= 7.0.8)
+      activesupport (= 7.0.8)
       mail (~> 2.5, >= 2.5.4)
+      net-imap
+      net-pop
+      net-smtp
       rails-dom-testing (~> 2.0)
-    actionpack (5.2.2)
-      actionview (= 5.2.2)
-      activesupport (= 5.2.2)
-      rack (~> 2.0)
+    actionpack (7.0.8)
+      actionview (= 7.0.8)
+      activesupport (= 7.0.8)
+      rack (~> 2.0, >= 2.2.4)
       rack-test (>= 0.6.3)
       rails-dom-testing (~> 2.0)
-      rails-html-sanitizer (~> 1.0, >= 1.0.2)
-    actionview (5.2.2)
-      activesupport (= 5.2.2)
+      rails-html-sanitizer (~> 1.0, >= 1.2.0)
+    actiontext (7.0.8)
+      actionpack (= 7.0.8)
+      activerecord (= 7.0.8)
+      activestorage (= 7.0.8)
+      activesupport (= 7.0.8)
+      globalid (>= 0.6.0)
+      nokogiri (>= 1.8.5)
+    actionview (7.0.8)
+      activesupport (= 7.0.8)
       builder (~> 3.1)
       erubi (~> 1.4)
       rails-dom-testing (~> 2.0)
-      rails-html-sanitizer (~> 1.0, >= 1.0.3)
-    activejob (5.2.2)
-      activesupport (= 5.2.2)
+      rails-html-sanitizer (~> 1.1, >= 1.2.0)
+    activejob (7.0.8)
+      activesupport (= 7.0.8)
       globalid (>= 0.3.6)
-    activemodel (5.2.2)
-      activesupport (= 5.2.2)
-    activerecord (5.2.2)
-      activemodel (= 5.2.2)
-      activesupport (= 5.2.2)
-      arel (>= 9.0)
-    activestorage (5.2.2)
-      actionpack (= 5.2.2)
-      activerecord (= 5.2.2)
-      marcel (~> 0.3.1)
-    activesupport (5.2.2)
+    activemodel (7.0.8)
+      activesupport (= 7.0.8)
+    activerecord (7.0.8)
+      activemodel (= 7.0.8)
+      activesupport (= 7.0.8)
+    activestorage (7.0.8)
+      actionpack (= 7.0.8)
+      activejob (= 7.0.8)
+      activerecord (= 7.0.8)
+      activesupport (= 7.0.8)
+      marcel (~> 1.0)
+      mini_mime (>= 1.1.0)
+    activesupport (7.0.8)
       concurrent-ruby (~> 1.0, >= 1.0.2)
-      i18n (>= 0.7, < 2)
-      minitest (~> 5.1)
-      tzinfo (~> 1.1)
-    arel (9.0.0)
-    bindex (0.5.0)
-    bootsnap (1.3.2)
-      msgpack (~> 1.0)
-    builder (3.2.3)
-    byebug (10.0.2)
-    coffee-rails (4.2.2)
+      i18n (>= 1.6, < 2)
+      minitest (>= 5.1)
+      tzinfo (~> 2.0)
+    bindex (0.8.1)
+    bootsnap (1.16.0)
+      msgpack (~> 1.2)
+    builder (3.2.4)
+    byebug (11.1.3)
+    coffee-rails (5.0.0)
       coffee-script (>= 2.2.0)
-      railties (>= 4.0.0)
+      railties (>= 5.2.0)
     coffee-script (2.4.1)
       coffee-script-source
       execjs
     coffee-script-source (1.12.2)
-    concurrent-ruby (1.1.4)
-    erubi (1.8.0)
-    execjs (2.7.0)
-    ffi (1.10.0)
-    globalid (0.4.2)
-      activesupport (>= 4.2.0)
-    i18n (1.5.3)
+    concurrent-ruby (1.2.2)
+    crass (1.0.6)
+    date (3.3.3)
+    erubi (1.12.0)
+    execjs (2.9.1)
+    ffi (1.16.3)
+    globalid (1.2.1)
+      activesupport (>= 6.1)
+    i18n (1.14.1)
       concurrent-ruby (~> 1.0)
-    jbuilder (2.8.0)
-      activesupport (>= 4.2.0)
-      multi_json (>= 1.2)
-    jquery-rails (4.3.3)
+    jbuilder (2.11.5)
+      actionview (>= 5.0.0)
+      activesupport (>= 5.0.0)
+    jquery-rails (4.6.0)
       rails-dom-testing (>= 1, < 3)
       railties (>= 4.2.0)
       thor (>= 0.14, < 2.0)
-    listen (3.1.5)
-      rb-fsevent (~> 0.9, >= 0.9.4)
-      rb-inotify (~> 0.9, >= 0.9.7)
-      ruby_dep (~> 1.2)
-    loofah (2.0.3)
+    listen (3.8.0)
+      rb-fsevent (~> 0.10, >= 0.10.3)
+      rb-inotify (~> 0.9, >= 0.9.10)
+    loofah (2.16.0)
+      crass (~> 1.0.2)
       nokogiri (>= 1.5.9)
-    mail (2.7.1)
+    mail (2.8.1)
       mini_mime (>= 0.1.1)
-    marcel (0.3.3)
-      mimemagic (~> 0.3.2)
-    method_source (0.9.2)
-    mimemagic (0.3.3)
-    mini_mime (1.0.1)
-    mini_portile2 (2.4.0)
-    minitest (5.11.3)
-    msgpack (1.2.6)
-    multi_json (1.13.1)
-    nio4r (2.3.1)
-    nokogiri (1.10.1)
-      mini_portile2 (~> 2.4.0)
-    pdf-core (0.7.0)
-    prawn (2.2.2)
-      pdf-core (~> 0.7.0)
-      ttfunk (~> 1.5)
+      net-imap
+      net-pop
+      net-smtp
+    marcel (1.0.2)
+    matrix (0.4.2)
+    method_source (1.0.0)
+    mimemagic (0.4.3)
+      nokogiri (~> 1)
+      rake
+    mini_mime (1.1.5)
+    minitest (5.20.0)
+    msgpack (1.7.2)
+    net-imap (0.4.1)
+      date
+      net-protocol
+    net-pop (0.1.2)
+      net-protocol
+    net-protocol (0.2.1)
+      timeout
+    net-smtp (0.4.0)
+      net-protocol
+    nio4r (2.5.9)
+    nokogiri (1.15.4-x86_64-linux)
+      racc (~> 1.4)
+    pdf-core (0.9.0)
+    prawn (2.4.0)
+      pdf-core (~> 0.9.0)
+      ttfunk (~> 1.7)
     prawn-table (0.2.2)
       prawn (>= 1.3.0, < 3.0.0)
-    puma (3.12.0)
-    rack (2.0.6)
-    rack-test (1.1.0)
-      rack (>= 1.0, < 3)
-    rails (5.2.2)
-      actioncable (= 5.2.2)
-      actionmailer (= 5.2.2)
-      actionpack (= 5.2.2)
-      actionview (= 5.2.2)
-      activejob (= 5.2.2)
-      activemodel (= 5.2.2)
-      activerecord (= 5.2.2)
-      activestorage (= 5.2.2)
-      activesupport (= 5.2.2)
-      bundler (>= 1.3.0)
-      railties (= 5.2.2)
-      sprockets-rails (>= 2.0.0)
-    rails-dom-testing (2.0.3)
-      activesupport (>= 4.2.0)
+    psych (5.1.1)
+      stringio
+    puma (6.4.0)
+      nio4r (~> 2.0)
+    racc (1.7.1)
+    rack (2.2.8)
+    rack-test (2.1.0)
+      rack (>= 1.3)
+    rails (7.0.8)
+      actioncable (= 7.0.8)
+      actionmailbox (= 7.0.8)
+      actionmailer (= 7.0.8)
+      actionpack (= 7.0.8)
+      actiontext (= 7.0.8)
+      actionview (= 7.0.8)
+      activejob (= 7.0.8)
+      activemodel (= 7.0.8)
+      activerecord (= 7.0.8)
+      activestorage (= 7.0.8)
+      activesupport (= 7.0.8)
+      bundler (>= 1.15.0)
+      railties (= 7.0.8)
+    rails-dom-testing (2.2.0)
+      activesupport (>= 5.0.0)
+      minitest
       nokogiri (>= 1.6)
-    rails-html-sanitizer (1.0.3)
-      loofah (~> 2.0)
-    railties (5.2.2)
-      actionpack (= 5.2.2)
-      activesupport (= 5.2.2)
+    rails-html-sanitizer (1.4.0)
+      loofah (~> 2.3)
+    railties (7.0.8)
+      actionpack (= 7.0.8)
+      activesupport (= 7.0.8)
       method_source
-      rake (>= 0.8.7)
-      thor (>= 0.19.0, < 2.0)
-    rake (12.3.2)
-    rb-fsevent (0.10.3)
-    rb-inotify (0.10.0)
+      rake (>= 12.2)
+      thor (~> 1.0)
+      zeitwerk (~> 2.5)
+    rake (13.0.6)
+    rb-fsevent (0.11.2)
+    rb-inotify (0.10.1)
       ffi (~> 1.0)
-    rdoc (6.1.1)
-    ruby_dep (1.5.0)
-    sass (3.7.3)
-      sass-listen (~> 4.0.0)
-    sass-listen (4.0.0)
-      rb-fsevent (~> 0.9, >= 0.9.4)
-      rb-inotify (~> 0.9, >= 0.9.7)
-    sass-rails (5.0.7)
-      railties (>= 4.0.0, < 6)
-      sass (~> 3.1)
-      sprockets (>= 2.8, < 4.0)
-      sprockets-rails (>= 2.0, < 4.0)
-      tilt (>= 1.1, < 3)
-    spring (2.0.2)
-      activesupport (>= 4.2)
-    spring-watcher-listen (2.0.1)
+    rdoc (6.5.0)
+      psych (>= 4.0.0)
+    sass-rails (6.0.0)
+      sassc-rails (~> 2.1, >= 2.1.1)
+    sassc (2.4.0)
+      ffi (~> 1.9)
+    sassc-rails (2.1.2)
+      railties (>= 4.0.0)
+      sassc (>= 2.0)
+      sprockets (> 3.0)
+      sprockets-rails
+      tilt
+    spring (4.1.1)
+    spring-watcher-listen (2.1.0)
       listen (>= 2.7, < 4.0)
-      spring (>= 1.2, < 3.0)
-    sprockets (3.7.2)
+      spring (>= 4)
+    sprockets (4.2.1)
       concurrent-ruby (~> 1.0)
-      rack (> 1, < 3)
-    sprockets-rails (3.2.1)
-      actionpack (>= 4.0)
-      activesupport (>= 4.0)
+      rack (>= 2.2.4, < 4)
+    sprockets-rails (3.4.2)
+      actionpack (>= 5.2)
+      activesupport (>= 5.2)
       sprockets (>= 3.0.0)
-    sqlite3 (1.3.13)
-    thor (0.20.3)
-    thread_safe (0.3.6)
-    tilt (2.0.9)
-    ttfunk (1.5.1)
-    turbolinks (5.2.0)
+    sqlite3 (1.4.4)
+    stringio (3.0.8)
+    thor (1.2.2)
+    tilt (2.3.0)
+    timeout (0.4.0)
+    ttfunk (1.7.0)
+    turbolinks (5.2.1)
       turbolinks-source (~> 5.2)
     turbolinks-source (5.2.0)
-    tzinfo (1.2.5)
-      thread_safe (~> 0.1)
-    uglifier (4.1.20)
+    tzinfo (2.0.6)
+      concurrent-ruby (~> 1.0)
+    uglifier (4.2.0)
       execjs (>= 0.3.0, < 3)
-    web-console (3.7.0)
-      actionview (>= 5.0)
-      activemodel (>= 5.0)
+    web-console (4.2.1)
+      actionview (>= 6.0.0)
+      activemodel (>= 6.0.0)
       bindex (>= 0.4.0)
-      railties (>= 5.0)
-    websocket-driver (0.7.0)
+      railties (>= 6.0.0)
+    websocket-driver (0.7.6)
       websocket-extensions (>= 0.1.0)
-    websocket-extensions (0.1.3)
+    websocket-extensions (0.1.5)
+    zeitwerk (2.6.12)
 
 PLATFORMS
-  ruby
+  x86_64-linux
 
 DEPENDENCIES
   bootsnap
@@ -184,21 +228,23 @@ DEPENDENCIES
   jbuilder
   jquery-rails
   listen
-  loofah (= 2.0.3)
+  loofah (= 2.16.0)
+  matrix (~> 0.4.2)
+  mimemagic
   prawn
   prawn-table
   puma
-  rails (~> 5.2.0)
-  rails-html-sanitizer (= 1.0.3)
+  rails (~> 7.0.Z)
+  rails-html-sanitizer (= 1.4.0)
   rdoc
   sass-rails
   spring
   spring-watcher-listen
-  sqlite3 (~> 1.3.0)
+  sqlite3 (~> 1.4.2)
   turbolinks
   tzinfo-data
   uglifier
   web-console
 
 BUNDLED WITH
-   2.0.1
+   2.3.15
diff --git a/README.md b/README.md
index a8632da..221a53e 100644
--- a/README.md
+++ b/README.md
@@ -26,7 +26,7 @@ reasonable amount:
 
 * [arachni (1.5.1)](https://github.com/Arachni/arachni)
 * [zaproxy (OSWASP ZAP, 2.7.0)](https://github.com/zaproxy/zaproxy)
-* [brakeman (4.2.1)](https://github.com/presidentbeef/brakeman)
+* [brakeman](https://github.com/presidentbeef/brakeman)
 
 ## Application Scenario
 
@@ -58,7 +58,7 @@ You are Peter, a student and you can log in with `peter` as username and
 
 ### Dependencies
 
-* Ruby 2.5 and [bundler](https://github.com/bundler/bundler)
+* Ruby 3.1 (and Raild 7) and [bundler](https://github.com/bundler/bundler)
 
 ### Checkout
 
@@ -106,6 +106,7 @@ Now, open your browser, go to <http://localhost:3000>, and start exploring!
 
 * [Achim D. Brucker](https://www.brucker.ch/)
 * [Michael Herzberg](https://www.mherzberg.de/)
+* [Sakine Yalman](http://emps.exeter.ac.uk/computer-science/staff/sy359)
 
 ## License
 
diff --git a/app/controllers/users_controller.rb b/app/controllers/users_controller.rb
index 1427735..094127e 100644
--- a/app/controllers/users_controller.rb
+++ b/app/controllers/users_controller.rb
@@ -49,7 +49,7 @@ class UsersController < ApplicationController
       @user = User.find_by params[:user].permit(:login, :secret_answer)
       if @user
         if params[:user][:password] == params[:user][:password_confirmation]
-          @user.update_attributes(:password => Digest::MD5.hexdigest(params[:user][:password]))
+          @user.update(:password => Digest::MD5.hexdigest(params[:user][:password]))
           @user.save
           flash[:success] = "Password changed successfully!"
           redirect_to root_url
diff --git a/config/application.rb b/config/application.rb
index e88f2d7..66b7251 100644
--- a/config/application.rb
+++ b/config/application.rb
@@ -2,6 +2,7 @@ require_relative 'boot'
 
 require 'rails/all'
 
+Bundler.setup
 # Require the gems listed in Gemfile, including any gems
 # you've limited to :test, :development, or :production.
 Bundler.require(*Rails.groups)
@@ -9,9 +10,9 @@ Bundler.require(*Rails.groups)
 module DVGM
   class Application < Rails::Application
     # Initialize configuration defaults for originally generated Rails version.
-    config.load_defaults 5.0
+    config.load_defaults 7.0
 
-    config.active_record.sqlite3.represent_boolean_as_integer = true
+    #config.active_record.sqlite3.represent_boolean_as_integer = true
 
     # Settings in config/environments/* take precedence over those specified here.
     # Application configuration can go into files in config/initializers
@@ -20,3 +21,4 @@ module DVGM
     config.report_dir = Rails.root.join("public", "reports")
   end
 end
+