diff --git a/.circleci/config.yml b/.circleci/config.yml
new file mode 100644
index 0000000..22835e8
--- /dev/null
+++ b/.circleci/config.yml
@@ -0,0 +1,141 @@
+# Ruby CircleCI 2.0 configuration file
+#
+# Check https://circleci.com/docs/2.0/language-ruby/ for more details
+#
+version: 2
+jobs:
+  "ruby-2.3":
+    docker:
+       - image: hanami/ruby-2.3
+    working_directory: ~/hanami-utils
+    steps:
+      - checkout
+      # Download and cache dependencies
+      - restore_cache:
+          keys:
+          - v1-dependencies-{{ checksum "Gemfile.lock" }}
+          # fallback to using the latest cache if no exact match is found
+          - v1-dependencies-
+      - run:
+          name: install dependencies
+          command: |
+            bundle install --jobs=4 --retry=3 --path vendor/bundle
+      - save_cache:
+          paths:
+            - ./vendor/bundle
+          key: v1-dependencies-{{ checksum "Gemfile.lock" }}
+      # run tests!
+      - run:
+          name: run tests
+          command: |
+            ./script/ci
+  "ruby-2.4":
+    docker:
+       - image: hanami/ruby-2.4
+    working_directory: ~/hanami-utils
+    steps:
+      - checkout
+      # Download and cache dependencies
+      - restore_cache:
+          keys:
+          - v1-dependencies-{{ checksum "Gemfile.lock" }}
+          # fallback to using the latest cache if no exact match is found
+          - v1-dependencies-
+      - run:
+          name: install dependencies
+          command: |
+            bundle install --jobs=4 --retry=3 --path vendor/bundle
+      - save_cache:
+          paths:
+            - ./vendor/bundle
+          key: v1-dependencies-{{ checksum "Gemfile.lock" }}
+      # run tests!
+      - run:
+          name: run tests
+          command: |
+            ./script/ci
+  "ruby-2.5":
+    docker:
+       - image: hanami/ruby-2.5
+    working_directory: ~/hanami-utils
+    steps:
+      - checkout
+      # Download and cache dependencies
+      - restore_cache:
+          keys:
+          - v1-dependencies-{{ checksum "Gemfile.lock" }}
+          # fallback to using the latest cache if no exact match is found
+          - v1-dependencies-
+      - run:
+          name: install dependencies
+          command: |
+            bundle install --jobs=4 --retry=3 --path vendor/bundle
+      - save_cache:
+          paths:
+            - ./vendor/bundle
+          key: v1-dependencies-{{ checksum "Gemfile.lock" }}
+      # run tests!
+      - run:
+          name: run tests
+          command: |
+            ./script/ci
+  "jruby-9.1":
+    docker:
+       - image: hanami/jruby-9.1
+    working_directory: ~/hanami-utils
+    steps:
+      - checkout
+      # Download and cache dependencies
+      - restore_cache:
+          keys:
+          - v1-dependencies-{{ checksum "Gemfile.lock" }}
+          # fallback to using the latest cache if no exact match is found
+          - v1-dependencies-
+      - run:
+          name: install dependencies
+          command: |
+            bundle install --jobs=4 --retry=3 --path vendor/bundle
+      - save_cache:
+          paths:
+            - ./vendor/bundle
+          key: v1-dependencies-{{ checksum "Gemfile.lock" }}
+      # run tests!
+      - run:
+          name: run tests
+          command: |
+            ./script/ci
+  "jruby-9.2":
+    docker:
+       - image: hanami/jruby-9.2
+    working_directory: ~/hanami-utils
+    steps:
+      - checkout
+      # Download and cache dependencies
+      - restore_cache:
+          keys:
+          - v1-dependencies-{{ checksum "Gemfile.lock" }}
+          # fallback to using the latest cache if no exact match is found
+          - v1-dependencies-
+      - run:
+          name: install dependencies
+          command: |
+            bundle install --jobs=4 --retry=3 --path vendor/bundle
+      - save_cache:
+          paths:
+            - ./vendor/bundle
+          key: v1-dependencies-{{ checksum "Gemfile.lock" }}
+      # run tests!
+      - run:
+          name: run tests
+          command: |
+            ./script/ci
+
+workflows:
+  version: 2
+  build:
+    jobs:
+      - "ruby-2.3"
+      - "ruby-2.4"
+      - "ruby-2.5"
+      - "jruby-9.1"
+      - "jruby-9.2"
diff --git a/.jrubyrc b/.jrubyrc
new file mode 100644
index 0000000..ec033ee
--- /dev/null
+++ b/.jrubyrc
@@ -0,0 +1 @@
+debug.fullTrace=true
diff --git a/.travis.yml b/.travis.yml
index 5218a51..ea2a5bf 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,19 +1,22 @@
 language: ruby
 sudo: false
 cache: bundler
+before_script:
+  - gem update --system
 script: ./script/ci
 rvm:
-  - 2.3.5
-  - 2.4.2
-  - 2.5.0
+  - 2.4.4
+  - 2.3.7
+  - 2.5.1
+  - jruby-9.1.9.0
   - ruby-head
-  - jruby-9.1.13.0
   - jruby-head
 
 matrix:
   allow_failures:
     - rvm: ruby-head
     - rvm: jruby-head
+    - rvm: jruby-9.1.9.0
 
 notifications:
   webhooks:
diff --git a/Gemfile b/Gemfile
index 86de0fe..e82b58c 100644
--- a/Gemfile
+++ b/Gemfile
@@ -3,7 +3,7 @@
 source "http://rubygems.org"
 gemspec
 
-unless ENV["TRAVIS"]
+unless ENV["CI"]
   gem "byebug", require: false, platforms: :mri
   gem "yard",   require: false
 end
@@ -12,4 +12,3 @@ gem "hanami-utils", "~> 2.0.alpha", require: false, git: "https://github.com/han
 
 gem "hanami-devtools", require: false, git: "https://github.com/hanami/devtools.git"
 gem "i18n", "~> 0.9",  require: false
-gem "coveralls",       require: false
diff --git a/README.md b/README.md
index 4e12a77..6635444 100644
--- a/README.md
+++ b/README.md
@@ -4,11 +4,11 @@ Validations mixin for Ruby objects
 
 ## Status
 
-[![Gem Version](http://img.shields.io/gem/v/hanami-validations.svg)](https://badge.fury.io/rb/hanami-validations)
-[![Build Status](http://img.shields.io/travis/hanami/validations/master.svg)](https://travis-ci.org/hanami/validations?branch=master)
-[![Coverage](http://img.shields.io/coveralls/hanami/validations/master.svg)](https://coveralls.io/r/hanami/validations)
-[![Code Climate](http://img.shields.io/codeclimate/github/hanami/validations.svg)](https://codeclimate.com/github/hanami/validations)
-[![Dependencies](http://img.shields.io/gemnasium/hanami/validations.svg)](https://gemnasium.com/hanami/validations)
+[![Gem Version](https://badge.fury.io/rb/hanami-validations.svg)](https://badge.fury.io/rb/hanami-validations)
+[![TravisCI](https://travis-ci.org/hanami/validations.svg?branch=master)](https://travis-ci.org/hanami/validations)
+[![CircleCI](https://circleci.com/gh/hanami/validations/tree/master.svg?style=svg)](https://circleci.com/gh/hanami/validations/tree/master)
+[![Test Coverage](https://codecov.io/gh/hanami/validations/branch/master/graph/badge.svg)](https://codecov.io/gh/hanami/validations)
+[![Depfu](https://badges.depfu.com/badges/a8545fb67cf32a2c75b6227bc0821027/overview.svg)](https://depfu.com/github/hanami/validations?project=Bundler)
 [![Inline Docs](http://inch-ci.org/github/hanami/validations.svg)](http://inch-ci.org/github/hanami/validations)
 
 ## Contact
diff --git a/Rakefile b/Rakefile
index 2db546a..395223e 100644
--- a/Rakefile
+++ b/Rakefile
@@ -3,12 +3,7 @@
 require "rake"
 require "bundler/gem_tasks"
 require "rspec/core/rake_task"
-
-require "rake/testtask"
-Rake::TestTask.new do |t|
-  t.pattern = "test/**/*_test.rb"
-  t.libs.push "test"
-end
+require "hanami/devtools/rake_tasks"
 
 namespace :spec do
   RSpec::Core::RakeTask.new(:unit) do |task|
@@ -17,11 +12,6 @@ namespace :spec do
 
     task.pattern = file_list
   end
-
-  task :coverage do
-    ENV["COVERAGE"] = "true"
-    Rake::Task["spec:unit"].invoke
-  end
 end
 
 task default: "spec:unit"
diff --git a/script/ci b/script/ci
index c495767..84a16a1 100755
--- a/script/ci
+++ b/script/ci
@@ -2,12 +2,23 @@
 set -euo pipefail
 IFS=$'\n\t'
 
+prepare_build() {
+  if [ -d coverage ]; then
+    rm -rf coverage
+  fi
+}
+
+print_ruby_version() {
+  echo "Using $(ruby -v)"
+  echo
+}
+
 run_code_quality_checks() {
   bundle exec rubocop .
 }
 
 run_unit_tests() {
-  bundle exec rake spec:coverage
+  bundle exec rake spec:unit
 }
 
 run_isolation_tests() {
@@ -42,10 +53,17 @@ run_test() {
   COVERAGE=true bundle exec rspec $test
 }
 
+upload_code_coverage() {
+  bundle exec rake codecov:upload
+}
+
 main() {
-  run_code_quality_checks &&
+  prepare_build &&
+    print_ruby_version &&
+    run_code_quality_checks &&
     run_unit_tests &&
-    run_isolation_tests
+    run_isolation_tests &&
+    upload_code_coverage
 }
 
 main
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index 52813f6..0afc0b1 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -1,36 +1,8 @@
 # frozen_string_literal: true
 
-if ENV["COVERALL"]
-  require "coveralls"
-  Coveralls.wear!
-end
-
-RSpec.configure do |config|
-  config.expect_with :rspec do |expectations|
-    expectations.include_chain_clauses_in_custom_matcher_descriptions = true
-  end
-
-  config.mock_with :rspec do |mocks|
-    mocks.verify_partial_doubles = true
-  end
-
-  config.shared_context_metadata_behavior = :apply_to_host_groups
-
-  config.filter_run_when_matching :focus
-  config.disable_monkey_patching!
-
-  config.warnings = true
-
-  config.default_formatter = "doc" if config.files_to_run.one?
-
-  config.profile_examples = 10
-
-  config.order = :random
-  Kernel.srand config.seed
-end
-
 $LOAD_PATH.unshift "lib"
 require "hanami/utils"
+require "hanami/devtools/unit"
 require "hanami/validations"
 require "hanami/validations/form"
 
diff --git a/spec/support/rspec.rb b/spec/support/rspec.rb
new file mode 100644
index 0000000..bcdd2b0
--- /dev/null
+++ b/spec/support/rspec.rb
@@ -0,0 +1,25 @@
+# frozen_string_literal: true
+
+RSpec.configure do |config|
+  config.expect_with :rspec do |expectations|
+    expectations.include_chain_clauses_in_custom_matcher_descriptions = true
+  end
+
+  config.mock_with :rspec do |mocks|
+    mocks.verify_partial_doubles = true
+  end
+
+  config.shared_context_metadata_behavior = :apply_to_host_groups
+
+  config.filter_run_when_matching :focus
+  config.disable_monkey_patching!
+
+  config.warnings = true
+
+  config.default_formatter = "doc" if config.files_to_run.one?
+
+  config.profile_examples = 10
+
+  config.order = :random
+  Kernel.srand config.seed
+end