diff --git a/.circleci/config.yml b/.circleci/config.yml
new file mode 100644
index 00000000..c76072a8
--- /dev/null
+++ b/.circleci/config.yml
@@ -0,0 +1,12 @@
+jobs:
+  build:
+    docker:
+      - image: cimg/ruby:3.3.5
+    environment:
+      RAILS_ENV: test
+    steps:
+      - checkout
+      - run: |
+          bundle install
+      - run: |
+          bundle exec rake test
diff --git a/.travis.yml b/.travis.yml
index a8f407e5..6c607d27 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -3,6 +3,7 @@ env:
     - "JRUBY_OPTS=-Xcext.enabled=true"
     - "CC_TEST_REPORTER_ID=faa393209ff0a104cf37511a9a03510bcee37951971b1ca4ffc2af217851d47e"
 language: ruby
+os: linux
 rvm:
   - 1.8.7
   - ree
@@ -15,11 +16,15 @@ rvm:
   - 2.5
   - 2.6
   - 2.7
+  - 3.0
+  - 3.1
+  - 3.2
   - ruby-head
   - jruby
-matrix:
+jobs:
   allow_failures:
     - rvm: 1.8.7
+    - rvm: ree
     - rvm: ruby-head
     - rvm: jruby
 branches:
@@ -33,4 +38,3 @@ before_script:
 script: "rake test" # test:scanners"
 after_script:
   - ./cc-test-reporter after-build --exit-code $TRAVIS_TEST_RESULT
-sudo: false
diff --git a/Changes.textile b/Changes.textile
index 99b79c8d..8c4f3e95 100644
--- a/Changes.textile
+++ b/Changes.textile
@@ -7,6 +7,7 @@ h2. Changes in 1.1.3
 * Tokens: Ensure Ruby 2.6 compatibility. [#233, thanks to Jun Aruga]
 * SQL scanner: Add @numeric@ data type. [#223, thanks to m16a1]
 * Java scanner: Add @var@ as type. [#229, thanks to Davide Angelocola]
+* Gem: Fix deprecation warning. [#246, thanks to David Rodríguez]
 
 h2. Changes in 1.1.2
 
diff --git a/Gemfile b/Gemfile
index 559648a2..49ac338d 100644
--- a/Gemfile
+++ b/Gemfile
@@ -7,13 +7,13 @@ gemspec
 # Include everything needed to run rake, tests, features, etc.
 group :development do
   gem 'bundler'
-  gem 'json', '>= 1.8' if RUBY_VERSION < '1.9'
+  gem 'json', '~> 1.8' if RUBY_VERSION < '2.0'
   gem 'rake',             RUBY_VERSION < '1.9' ? '~> 10.5'    : '>= 10.5'
   gem 'rdoc',             Gem::Version.new(RUBY_VERSION) < Gem::Version.new('1.9.3') ? '~> 4.2.2' : Gem::Version.new(RUBY_VERSION) < Gem::Version.new('2.2.2') ? '< 6' : '>= 6'
   gem 'RedCloth',         RUBY_PLATFORM == 'java' ? '= 4.2.9' : '>= 4.0.3'
   gem 'rspec',            '~> 3.9.0'
   gem 'shoulda-context',  RUBY_VERSION < '1.9' ? '= 1.2.1'    : '>= 1.2.1'
-  gem 'simplecov',        '~> 0.17.1'
+  gem 'simplecov',        RUBY_VERSION < '2.7' ? '~> 0.17.1'  : '>= 0.18.5'
   gem 'term-ansicolor',   RUBY_VERSION < '2.0' ? '~> 1.3.2'   : '>= 1.3.2'
   gem 'test-unit',        RUBY_VERSION < '1.9' ? '~> 2.0'     : '>= 3.0'
   gem 'tins',             RUBY_VERSION < '2.0' ? '~> 1.6.0'   : '>= 1.6.0'
diff --git a/MIT-LICENSE b/MIT-LICENSE
index d8d009d1..9431e246 100644
--- a/MIT-LICENSE
+++ b/MIT-LICENSE
@@ -1,4 +1,4 @@
-Copyright (C) 2005-2012 Kornelius Kalnbach <murphy@rubychan.de> (@murphy_karasu)
+Copyright (C) 2005 Kornelius Kalnbach <murphy@rubychan.de> (@murphy_karasu)
 
 http://coderay.rubychan.de/
 
@@ -19,4 +19,4 @@ MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
-WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
\ No newline at end of file
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
diff --git a/README.markdown b/README.markdown
index 410d1bff..a768ef10 100644
--- a/README.markdown
+++ b/README.markdown
@@ -1,7 +1,6 @@
 # CodeRay
 
-[![Build Status](https://travis-ci.org/rubychan/coderay.svg?branch=master)](https://travis-ci.org/rubychan/coderay)
-[![Gem Version](https://badge.fury.io/rb/coderay.svg)](https://badge.fury.io/rb/coderay) [![Maintainability](https://api.codeclimate.com/v1/badges/e015bbd5eab45d948b6b/maintainability)](https://codeclimate.com/github/rubychan/coderay/maintainability)
+[![CircleCI](https://dl.circleci.com/status-badge/img/gh/rubychan/coderay/tree/master.svg?style=svg&circle-token=CCIPRJ_BbFff6nMhNtPdrCBNMDxNq_be00bbb00849a29d8d8d2e28e7b84cbf76a9ee5c)](https://dl.circleci.com/status-badge/redirect/gh/rubychan/coderay/tree/master) [![Gem Version](https://badge.fury.io/rb/coderay.svg)](https://badge.fury.io/rb/coderay) [![Maintainability](https://api.codeclimate.com/v1/badges/e015bbd5eab45d948b6b/maintainability)](https://codeclimate.com/github/rubychan/coderay/maintainability)
 
 ## About
 
diff --git a/coderay.gemspec b/coderay.gemspec
index 50c195b5..9aba34eb 100644
--- a/coderay.gemspec
+++ b/coderay.gemspec
@@ -28,7 +28,6 @@ Gem::Specification.new do |s|
   s.executables   = `git ls-files -- bin/*`.split("\n").map { |f| File.basename(f) }
   s.require_paths = ['lib']
   
-  s.rubyforge_project = s.name
-  s.rdoc_options      = '-SNw2', "-m#{readme_file}", '-t CodeRay Documentation'
+  s.rdoc_options      = '-Nw2', "-m#{readme_file}", '-t CodeRay Documentation'
   s.extra_rdoc_files  = readme_file
 end
diff --git a/lib/coderay/version.rb b/lib/coderay/version.rb
index f5e7a39d..3c68bd83 100644
--- a/lib/coderay/version.rb
+++ b/lib/coderay/version.rb
@@ -1,3 +1,3 @@
 module CodeRay
-  VERSION = '1.1.2'
+  VERSION = '1.1.3'
 end
diff --git a/test/executable/suite.rb b/test/executable/suite.rb
index 4eb86c1c..a6f40972 100644
--- a/test/executable/suite.rb
+++ b/test/executable/suite.rb
@@ -1,4 +1,4 @@
-require 'simplecov'
+require 'simplecov' if RUBY_VERSION >= '1.9'
 require 'test/unit'
 require 'rubygems' unless defined? Gem
 require 'shoulda-context'
diff --git a/test/functional/for_redcloth.rb b/test/functional/for_redcloth.rb
index 05c6e2d6..32a1a1b3 100644
--- a/test/functional/for_redcloth.rb
+++ b/test/functional/for_redcloth.rb
@@ -1,4 +1,4 @@
-require 'simplecov'
+require 'simplecov' if RUBY_VERSION >= '1.9'
 require 'test/unit'
 
 $:.unshift File.expand_path('../../../lib', __FILE__)
diff --git a/test/functional/suite.rb b/test/functional/suite.rb
index f87ca0fe..2bbc29c5 100644
--- a/test/functional/suite.rb
+++ b/test/functional/suite.rb
@@ -1,4 +1,4 @@
-require 'simplecov'
+require 'simplecov' if RUBY_VERSION >= '1.9'
 require 'test/unit'
 
 $VERBOSE = $CODERAY_DEBUG = true
diff --git a/test/unit/debug.rb b/test/unit/debug.rb
index 88baf563..b694f21e 100644
--- a/test/unit/debug.rb
+++ b/test/unit/debug.rb
@@ -24,7 +24,8 @@ def test_creation
     ["   \n", :space],
     ["[]", :method],
     [:end_line, :head],
-  ].flatten
+  ]
+  TEST_INPUT.flatten!
   TEST_OUTPUT = <<-'DEBUG'.chomp
 integer(10)operator((\\\))string<content(test)>head[
 
diff --git a/test/unit/statistic.rb b/test/unit/statistic.rb
index 1326dca6..776774d4 100644
--- a/test/unit/statistic.rb
+++ b/test/unit/statistic.rb
@@ -24,7 +24,8 @@ def test_creation
     ["   \n", :space],
     ["[]", :method],
     [:end_line, :test],
-  ].flatten
+  ]
+  TEST_INPUT.flatten!
   TEST_OUTPUT = <<-'DEBUG'
 
 Code Statistics
@@ -56,4 +57,4 @@ def test_filtering_text_tokens
     assert_equal TEST_OUTPUT, TEST_INPUT.statistic
   end
   
-end
\ No newline at end of file
+end
diff --git a/test/unit/suite.rb b/test/unit/suite.rb
index 26ebe1b5..7d20dc0c 100755
--- a/test/unit/suite.rb
+++ b/test/unit/suite.rb
@@ -1,4 +1,4 @@
-require 'simplecov'
+require 'simplecov' if RUBY_VERSION >= '1.9'
 require 'test/unit'
 require 'rubygems'