diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index b3315ceda..c0e7ee59d 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -11,8 +11,8 @@ jobs:
 
     strategy:
       matrix:
-        ruby: ['2.7', '3.0', '3.1']
-        redmine: ['5.0-stable', 'master']
+        ruby: ['3.2', '3.3']
+        redmine: ['6.0-stable', 'master']
         db: ['postgres', 'mysql']
       fail-fast: false
 
@@ -71,10 +71,7 @@ jobs:
       - name: Checkout redmine_sidekiq
         uses: actions/checkout@v3
         with:
-          # TODO Switch back to the original repo, once https://github.com/ogom/redmine_sidekiq/pull/16 is released
-          # repository: ogom/redmine_sidekiq
-          repository: dosyfier/redmine_sidekiq
-          ref: fix-rails-6
+          repository: ogom/redmine_sidekiq
           path: redmine/plugins/redmine_sidekiq
 
       - name: Checkout gitolite
@@ -121,7 +118,9 @@ jobs:
         run: |
           sudo useradd --create-home git
           sudo -n -u git -i mkdir bin
-          sudo -n -u git -i $GITHUB_WORKSPACE/gitolite/install -to /home/git/bin
+          sudo cp -r $GITHUB_WORKSPACE/gitolite /home/git/
+          sudo chown -R git:git /home/git/gitolite
+          sudo -n -u git -i perl /home/git/gitolite/install -to /home/git/bin
           sudo cp plugins/redmine_git_hosting/ssh_keys/redmine_gitolite_admin_id_rsa.pub /home/git/
           sudo chown git.git /home/git/redmine_gitolite_admin_id_rsa.pub
           sudo -n -u git -i bin/gitolite setup -pk redmine_gitolite_admin_id_rsa.pub
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4e765c5d4..e392a48aa 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,23 @@
 # Changelog
 
+## 7.0.0 - TBD
+
+### Added
+
+- Support for Redmine 6.0
+
+### Changed
+
+- Update all models to inherit from ApplicationRecord instead of ActiveRecord::Base
+- Fix serialize syntax for Rails 7 compatibility using `type:` parameter
+- Update minimum Ruby version requirement to 3.0+
+
+### BREAKING CHANGE
+
+- Redmine 6.0+ is required
+- Ruby 3.0+ is required
+- Removed support for Redmine 5.x
+
 ## 6.0.1 - 2022-11-04
 
 ### Changed
diff --git a/app/models/repository_git_extra.rb b/app/models/repository_git_extra.rb
index fe6e3a37c..202c2c492 100644
--- a/app/models/repository_git_extra.rb
+++ b/app/models/repository_git_extra.rb
@@ -1,7 +1,8 @@
 # frozen_string_literal: true
 
-class RepositoryGitExtra < ActiveRecord::Base
+class RepositoryGitExtra < (defined?(ApplicationRecord) == 'constant' ? ApplicationRecord : ActiveRecord::Base)
   include Redmine::SafeAttributes
+  include Redmine::I18n
 
   SMART_HTTP_OPTIONS = [[l(:label_disabled), '0'],
                         [l(:label_http_only), '3'],
@@ -33,7 +34,7 @@ class RepositoryGitExtra < ActiveRecord::Base
   validate :validate_urls_order
 
   ## Serializations
-  serialize :urls_order, Array
+  serialize :urls_order, type: Array
 
   ## Callbacks
   before_save :check_urls_order_consistency
diff --git a/app/models/repository_post_receive_url.rb b/app/models/repository_post_receive_url.rb
index 8bfb858dc..5daad69b9 100644
--- a/app/models/repository_post_receive_url.rb
+++ b/app/models/repository_post_receive_url.rb
@@ -22,7 +22,7 @@ class RepositoryPostReceiveUrl < ActiveRecord::Base
   validates :mode, presence: true, inclusion: { in: %i[github get post] }
 
   ## Serializations
-  serialize :triggers, Array
+  serialize :triggers, type: Array
 
   ## Scopes
   scope :active, -> { where active: true }
diff --git a/app/models/repository_protected_branche.rb b/app/models/repository_protected_branche.rb
index f95911266..ea0e47594 100644
--- a/app/models/repository_protected_branche.rb
+++ b/app/models/repository_protected_branche.rb
@@ -1,6 +1,6 @@
 # frozen_string_literal: true
 
-class RepositoryProtectedBranche < ActiveRecord::Base
+class RepositoryProtectedBranche < (defined?(ApplicationRecord) == 'constant' ? ApplicationRecord : ActiveRecord::Base)
   include Redmine::SafeAttributes
   VALID_PERMS  = ['RW+', 'RW', 'R', '-'].freeze
   DEFAULT_PERM = 'RW+'
diff --git a/db/migrate/20150823030100_migrate_protected_branches_users.rb b/db/migrate/20150823030100_migrate_protected_branches_users.rb
index 9c1b60c54..1315ce46d 100644
--- a/db/migrate/20150823030100_migrate_protected_branches_users.rb
+++ b/db/migrate/20150823030100_migrate_protected_branches_users.rb
@@ -1,7 +1,7 @@
 # frozen_string_literal: true
 
 class RepositoryProtectedBrancheWrapped < RepositoryProtectedBranche
-  serialize :user_list, Array
+  serialize :user_list, type: Array
 end
 
 class MigrateProtectedBranchesUsers < ActiveRecord::Migration[4.2]
diff --git a/init.rb b/init.rb
index bc3ba946d..3c2633639 100644
--- a/init.rb
+++ b/init.rb
@@ -11,7 +11,7 @@
   author_url  'settings/plugin/redmine_git_hosting/authors'
 
   settings partial: 'settings/redmine_git_hosting', default: RedmineGitHosting.settings
-  requires_redmine version_or_higher: '4.1.0'
+  requires_redmine version_or_higher: '6.0.0'
 
   permission :create_gitolite_ssh_key, gitolite_public_keys: %i[index create destroy], require: :loggedin
 
diff --git a/lib/redmine_git_hosting.rb b/lib/redmine_git_hosting.rb
index 63ba515e7..670b01666 100644
--- a/lib/redmine_git_hosting.rb
+++ b/lib/redmine_git_hosting.rb
@@ -6,7 +6,7 @@
 module RedmineGitHosting
   extend self
 
-  VERSION = '6.0.1'
+  VERSION = '7.0.0'
 
   # Load RedminePluginLoader
   extend RedminePluginLoader
diff --git a/lib/redmine_git_hosting/redcarpet_filter.rb b/lib/redmine_git_hosting/redcarpet_filter.rb
index c49c5e48a..cd3ddf5bf 100644
--- a/lib/redmine_git_hosting/redcarpet_filter.rb
+++ b/lib/redmine_git_hosting/redcarpet_filter.rb
@@ -2,46 +2,35 @@
 
 require 'html/pipeline/filter'
 require 'html/pipeline/text_filter'
-require 'redcarpet'
-require 'rouge'
-require 'rouge/plugins/redcarpet'
 
 module RedmineGitHosting
-  class HTMLwithRouge < Redcarpet::Render::HTML
-    include Rouge::Plugins::Redcarpet
-  end
-
   class RedcarpetFilter < HTML::Pipeline::TextFilter
     def initialize(text, context = nil, result = nil)
       super text, context, result
       @text = @text.delete "\r"
     end
 
-    # Convert Markdown to HTML using the best available implementation
-    # and convert into a DocumentFragment.
+    # Convert Markdown to HTML using Redmine's WikiFormatting system
+    # for consistency with Redmine's text formatting configuration.
     #
     def call
-      html = self.class.renderer.render @text
+      html = markdown_formatter.new(@text).to_html
       html.rstrip!
       html
     end
 
-    def self.renderer
-      @renderer ||= Redcarpet::Markdown.new HTMLwithRouge, markdown_options
-    end
+    private
 
-    def self.markdown_options
-      @markdown_options ||= {
-        fenced_code_blocks: true,
-        lax_spacing: true,
-        strikethrough: true,
-        autolink: true,
-        tables: true,
-        underline: true,
-        highlight: true
-      }.freeze
+    def markdown_formatter
+      # Find the markdown formatter from Redmine's WikiFormatting system
+      formatter_name = Redmine::WikiFormatting.format_names.find { |name| name =~ /markdown/i }
+      
+      if formatter_name
+        Redmine::WikiFormatting.formatter_for(formatter_name)
+      else
+        # Fallback to textile formatter if no markdown formatter is available
+        Redmine::WikiFormatting.formatter_for('textile')
+      end
     end
-
-    private_class_method :markdown_options
   end
 end