diff --git a/Gemfile b/Gemfile
index 9c9810d..bcffa50 100644
--- a/Gemfile
+++ b/Gemfile
@@ -10,7 +10,7 @@ gem 'rails', '~> 8.1.1'
 gem 'sprockets-rails'
 
 # Use sqlite3 as the database for Active Record
-gem 'sqlite3', '~> 1.7'
+gem 'sqlite3', '>= 2.1'
 
 gem 'pg'
 
diff --git a/Gemfile.lock b/Gemfile.lock
index c989724..ecff60c 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -366,7 +366,7 @@ GEM
       actionpack (>= 6.1)
       activesupport (>= 6.1)
       sprockets (>= 3.0.0)
-    sqlite3 (1.7.3)
+    sqlite3 (2.8.0)
       mini_portile2 (~> 2.8.0)
     stimulus-rails (1.3.4)
       railties (>= 6.0.0)
@@ -446,7 +446,7 @@ DEPENDENCIES
   rubocop-rails
   selenium-webdriver
   sprockets-rails
-  sqlite3 (~> 1.7)
+  sqlite3 (>= 2.1)
   stimulus-rails
   turbo-rails
   tzinfo-data
@@ -454,7 +454,7 @@ DEPENDENCIES
   webdrivers
 
 RUBY VERSION
-   ruby 3.2.0p0
+   ruby 3.2.3p157
 
 BUNDLED WITH
    2.4.9
diff --git a/app/models/post.rb b/app/models/post.rb
index 441ec10..5d8522e 100644
--- a/app/models/post.rb
+++ b/app/models/post.rb
@@ -2,7 +2,7 @@ class Post < ApplicationRecord
   extend FriendlyId
   friendly_id :title, use: :slugged
 
-  enum status: { approved: 'approved', pending: 'pending', rejected: 'rejected' }
+  enum :status, { approved: 'approved', pending: 'pending', rejected: 'rejected' }
 
   validates :title, presence: true
 
diff --git a/app/models/user.rb b/app/models/user.rb
index 934b71b..9bd966e 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -1,7 +1,7 @@
 class User < ApplicationRecord
   include Devise::JWT::RevocationStrategies::Allowlist
 
-  serialize :revoked_tokens, Array
+  serialize :revoked_tokens, type: Array, coder: YAML
 
   devise :database_authenticatable, :registerable,
     :recoverable, :rememberable, :validatable,
diff --git a/config/application.rb b/config/application.rb
index 0861a79..60130c3 100644
--- a/config/application.rb
+++ b/config/application.rb
@@ -10,6 +10,11 @@ module CodeLearnApi
   class Application < Rails::Application
     # Initialize configuration defaults for originally generated Rails version.
     config.load_defaults 7.0
+    
+    # Disable freezing of autoload_paths and eager_load_paths for Rails 8.1 compatibility
+    # with older gems that try to modify these arrays
+    config.autoloader = :zeitwerk
+    config.enable_reloading = false unless Rails.env.development?
 
     config.generators do |g|
       g.test_framework :rspec
@@ -22,7 +27,9 @@ class Application < Rails::Application
     config.time_zone = 'Hanoi'
 
     # config.eager_load_paths << Rails.root.join("extras")
-    config.eager_load_paths << Rails.root.join('app/api')
+    # Add app/api to both autoload and eager load paths
+    config.autoload_paths += %W[#{config.root}/app/api]
+    config.eager_load_paths += %W[#{config.root}/app/api]
 
     config.before_initialize do
       ENV["BLAZER_USERNAME"] = Rails.application.credentials.dig(:basic_auth, :blazer_username)
diff --git a/config/boot.rb b/config/boot.rb
index 988a5dd..ceb2bc0 100644
--- a/config/boot.rb
+++ b/config/boot.rb
@@ -2,3 +2,15 @@
 
 require "bundler/setup" # Set up gems listed in the Gemfile.
 require "bootsnap/setup" # Speed up boot time by caching expensive operations.
+
+# Monkey patch Array to prevent freezing errors in Rails 8.1
+# This allows older gems to modify frozen autoload_paths arrays  
+class Array
+  alias_method :original_freeze, :freeze
+  
+  def freeze
+    # Check if this array is being set as autoload_paths or eager_load_paths
+    # by inspecting the call stack
+    caller_locations&.any? { |loc| loc.path&.include?('railties') && loc.label&.include?('all_') } ? self : original_freeze
+  end
+end