diff --git a/.tool-versions b/.tool-versions
index 9e83a384..05668b72 100644
--- a/.tool-versions
+++ b/.tool-versions
@@ -1 +1 @@
-ruby 2.7.3
+ruby 3.3.4
diff --git a/Gemfile b/Gemfile
index 0998ee0d..fd7d3699 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,8 +1,8 @@
 source 'https://rubygems.org'
 
-ruby '>= 2.4.0'
+ruby '>= 2.4.0', '<= 3.3.5'
 
-gem 'activerecord', '>= 4.2.5', '< 6', require: false
+gem 'activerecord', '>= 4.2.5', '<= 8.0.0', require: false
 gem 'rake', require: false
 
 group :development do
@@ -29,7 +29,6 @@ group :development, :test do
   gem 'coveralls'
 
   gem 'overcommit'
-  gem 'ruby_dep', '1.5.0'
 
   platforms :mri, :mingw do
     gem 'pry', require: false
@@ -38,6 +37,6 @@ group :development, :test do
 end
 
 group :test do
-  gem 'files', require: false
+  gem "files", git: "https://github.com/rodrigotoledo/files"
   gem 'git', require: false
 end
diff --git a/annotate.gemspec b/annotate.gemspec
index 43b2ac99..d42edd32 100644
--- a/annotate.gemspec
+++ b/annotate.gemspec
@@ -7,11 +7,11 @@ Gem::Specification.new do |s|
   s.name = 'annotate'
   s.version = Annotate.version
 
-  s.required_ruby_version = '>= 2.4.0'
+  s.required_ruby_version = '>= 2.4.0', '<= 3.3.5'
   s.required_rubygems_version = Gem::Requirement.new('>= 0') if s.respond_to? :required_rubygems_version=
-  s.authors = ['Alex Chaffee', 'Cuong Tran', 'Marcos Piccinini', 'Turadg Aleahmad', 'Jon Frisby']
+  s.authors = ['Alex Chaffee', 'Cuong Tran', 'Marcos Piccinini', 'Turadg Aleahmad', 'Jon Frisby', 'RToledo Dev']
   s.description = 'Annotates Rails/ActiveRecord Models, routes, fixtures, and others based on the database schema.'
-  s.email = ['alex@stinky.com', 'cuong.tran@gmail.com', 'x@nofxx.com', 'turadg@aleahmad.net', 'jon@cloudability.com']
+  s.email = ['alex@stinky.com', 'cuong.tran@gmail.com', 'x@nofxx.com', 'turadg@aleahmad.net', 'jon@cloudability.com', 'rodrigo@rtoledo.inf.br']
   s.executables = ['annotate']
   s.extra_rdoc_files = ['README.md', 'CHANGELOG.md']
   s.files = `git ls-files -z LICENSE.txt *.md *.gemspec bin lib`.split("\x0")
@@ -23,7 +23,7 @@ Gem::Specification.new do |s|
 
   s.specification_version = 4 if s.respond_to? :specification_version
   s.add_runtime_dependency(%q<rake>, '>= 10.4', '< 14.0')
-  s.add_runtime_dependency(%q<activerecord>, ['>= 3.2', '< 8.0'])
+  s.add_runtime_dependency(%q<activerecord>, ['>= 3.2', '<= 8.0.0'])
 
   s.metadata = {
     "bug_tracker_uri" => "https://github.com/ctran/annotate_models/issues/",