diff --git a/CHANGELOG b/CHANGELOG
deleted file mode 100644
index f9a50b0..0000000
--- a/CHANGELOG
+++ /dev/null
@@ -1,26 +0,0 @@
-
-v1.2.0
-  - 2014/11/10: feature(hash_counter): added float mode (Artem Napolskih)
-  - 2014/10/22: feature(unique_values_list): introduced a list of unique values to expiry of the members (Artem Napolskih)
-  - 2014/10/17: feature(unique_values_list): introduce has_value? method (Artem Napolskih)
-  - 2014/10/17: feature(unique_values_list): rename Standard and Fast unique values list to Blocking and NonBlocking respectively (Artem Napolskih)
-  - 2014/10/17: chore(specs): reorganize unique lists specs (Artem Napolskih)
-  - 2014/04/23: chore(all): fix circleci badge (Artem Napolskih)
-  - 2013/11/20: Release 1.1.0 (Artem Napolskih)
-  - 2013/11/20: refactor(all): back delete_all! methods (Artem Napolskih)
-  - 2013/11/15: refactor(all): extract Cluster and Partition classes (Artem Napolskih)
-  - 2013/11/15: refactor(all): shared code of clustering and partitioning extracted into module (Napolskih)
-
-v1.0.1
-  - 2013/10/21: feature(hash_counter): method date when called with a block, now returns the total number of lines (Artem Napolskih)
-  - 2013/10/21: Release 1.0.0 (Artem Napolskih)
-  - 2013/10/18: feature(unique_values_lists): added methods to read and delete data (Artem Napolskih)
-  - 2013/10/10: feature(unique_hash_counter): introduce unique list postfix delimiter (Artem Napolskih)
-  - 2013/10/10: feature(hash_counter): added methods to read and delete data (Artem Napolskih)
-  - 2013/09/13: docs(all): documenting (Artem Napolskih)
-
-v1.0.0beta1
-  - 2013/09/12: feature(all) introduce key and value delimiters (Artem Napolskih)
-  - 2013/09/12: feature(unique_values_list): fast (non blocking) unique values list added (Artem Napolskih)
-  - 2013/09/11: Initial commit (Artem Napolskih)
-  - 2013/08/21: dummy commit (napolskih)
diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 0000000..a5b2b4a
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,38 @@
+
+#### [Current]
+
+
+#### v1.2.0
+ * 2014-11-10 [be642ce](../../commit/be642ce) - __(Artem Napolskih)__ Release 1.2.0
+ * 2014-11-10 [6257dc2](../../commit/6257dc2) - __(Artem Napolskih)__ feature(hash_counter): added float mode
+ * 2014-10-17 [48deb40](../../commit/48deb40) - __(Artem Napolskih)__ feature(unique_values_list): introduced a list of unique values to expiry of the members
+ * 2014-10-17 [e1206b7](../../commit/e1206b7) - __(Artem Napolskih)__ feature(unique_values_list): introduce has_value? method
+ * 2014-10-17 [cccc2be](../../commit/cccc2be) - __(Artem Napolskih)__ feature(unique_values_list): rename Standard and Fast unique values list to Blocking and NonBlocking respectively
+ * 2014-10-17 [7521fd8](../../commit/7521fd8) - __(Artem Napolskih)__ chore(specs): reorganize unique lists specs
+ * 2014-04-23 [94fada3](../../commit/94fada3) - __(Artem Napolskih)__ chore(all): fix circleci badge
+ * 2013-11-20 [0ae5531](../../commit/0ae5531) - __(Artem Napolskih)__ Release 1.1.0
+
+#### v1.1.0
+ * 2013-11-20 [01f12f9](../../commit/01f12f9) - __(Artem Napolskih)__ Release 1.1.0
+ * 2013-11-20 [3897988](../../commit/3897988) - __(Artem Napolskih)__ refactor(all): back delete_all! methods
+ * 2013-11-15 [2d1c733](../../commit/2d1c733) - __(Artem Napolskih)__ refactor(all): extract Cluster and Partition classes
+ * 2013-10-22 [020cc8e](../../commit/020cc8e) - __(Napolskih)__ refactor(all): shared code of clustering and partitioning extracted into module - group_keys -> cluster_keys - shared code of clustering and partitioning extracted into module
+
+#### v1.0.1
+ * 2013-10-21 [9b5e13b](../../commit/9b5e13b) - __(Artem Napolskih)__ Release 1.0.1
+ * 2013-10-21 [bfa328a](../../commit/bfa328a) - __(Artem Napolskih)__ feature(hash_counter): method date when called with a block, now returns the total number of lines
+ * 2013-10-21 [6d04c95](../../commit/6d04c95) - __(Artem Napolskih)__ Release 1.0.0
+
+#### v1.0.0
+ * 2013-10-21 [b5f5344](../../commit/b5f5344) - __(Artem Napolskih)__ Release 1.0.0
+ * 2013-10-10 [b29eab7](../../commit/b29eab7) - __(Artem Napolskih)__ feature(unique_values_lists): added methods to read and delete data
+ * 2013-10-10 [67c5200](../../commit/67c5200) - __(Artem Napolskih)__ feature(unique_hash_counter): introduce unique list postfix delimiter
+ * 2013-10-08 [8a9a2a9](../../commit/8a9a2a9) - __(Artem Napolskih)__ feature(hash_counter): added methods to read and delete data
+ * 2013-09-13 [f8d037c](../../commit/f8d037c) - __(Artem Napolskih)__ docs(all): documenting
+
+#### v1.0.0beta1
+ * 2013-09-13 [43016ec](../../commit/43016ec) - __(Artem Napolskih)__ Release 1.0.0beta1
+ * 2013-09-12 [0a176fa](../../commit/0a176fa) - __(Artem Napolskih)__ feature(all) introduce key and value delimiters
+ * 2013-09-12 [addbb40](../../commit/addbb40) - __(Artem Napolskih)__ feature(unique_values_list): fast (non blocking) unique values list added
+ * 2013-08-23 [897418d](../../commit/897418d) - __(Artem Napolskih)__ Initial commit
+ * 2013-08-21 [21ed53b](../../commit/21ed53b) - __(napolskih)__ dummy commit
diff --git a/Gemfile b/Gemfile
index a0b6856..cd8aa9e 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,4 +1,3 @@
 source 'https://rubygems.org'
-source 'http://apress:montalcino@gems.railsc.ru'
 
 gemspec
\ No newline at end of file
diff --git a/Rakefile b/Rakefile
index 7599eea..efd0034 100644
--- a/Rakefile
+++ b/Rakefile
@@ -1,11 +1,12 @@
 # coding: utf-8
+require 'bundler/gem_tasks'
+
 # load everything from tasks/ directory
 Dir[File.join(File.dirname(__FILE__), 'tasks', '*.{rb,rake}')].each { |f| load(f) }
 
-task :build => [:check]
-task :tag => :build
+task :release => [:check, :changelog]
 
-desc 'Check if all projects are ready for build process'
+desc 'Check quality'
 task :check => [:audit, :quality, :coverage]
 
 require 'rspec/core/rake_task'
diff --git a/VERSION b/VERSION
deleted file mode 100644
index 867e524..0000000
--- a/VERSION
+++ /dev/null
@@ -1 +0,0 @@
-1.2.0
\ No newline at end of file
diff --git a/redis_counters.gemspec b/redis_counters.gemspec
index 79597a2..882e1e8 100644
--- a/redis_counters.gemspec
+++ b/redis_counters.gemspec
@@ -3,40 +3,29 @@ lib = File.expand_path('../lib', __FILE__)
 $LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
 require 'redis_counters/version'
 
-Gem::Specification.new do |gem|
-  gem.name          = 'redis_counters'
-  gem.version       = RedisCounters::VERSION
-  gem.authors       = ['Artem Napolskih']
-  gem.email         = %w(napolskih@gmail.com)
-  gem.summary       = %q{Redis Counters}
-  gem.homepage      = 'https://github.com/abak-press/redis_counters'
-
-  gem.files         = `git ls-files`.split($/)
-  gem.executables   = gem.files.grep(%r{^bin/}) { |f| File.basename(f) }
-  gem.test_files    = gem.files.grep(%r{^(test|spec|features)/})
-  gem.require_paths = ['lib']
-
-  gem.add_dependency 'activesupport', '>= 3.0'
-
-  gem.add_development_dependency 'bundler'
-  gem.add_development_dependency 'rake'
-  gem.add_development_dependency 'rspec', '~> 2.14.0'
-  gem.add_development_dependency 'mock_redis'
-  gem.add_development_dependency 'timecop'
-  gem.add_development_dependency 'codeclimate-test-reporter', '~> 0.4.1'
-
-  # test coverage tool
-  gem.add_development_dependency 'simplecov'
-
-  # code quality check
-  gem.add_development_dependency 'cane', '>= 2.6.0'
-
-  # dependencies security tool
-  gem.add_development_dependency 'bundler-audit'
-
-  # automatic changelog builder
-  gem.add_development_dependency 'changelogger'
-
-  # a tool for uploading files to private gem repo
-  gem.add_development_dependency 'multipart-post'
+Gem::Specification.new do |spec|
+  spec.name          = 'redis_counters'
+  spec.version       = RedisCounters::VERSION
+  spec.authors       = ['Artem Napolskih']
+  spec.email         = %w(napolskih@gmail.com)
+  spec.summary       = %q{Redis Counters}
+  spec.homepage      = 'https://github.com/abak-press/redis_counters'
+
+  spec.files         = `git ls-files -z`.split("\x0")
+  spec.executables   = spec.files.grep(%r{^bin/}) { |f| File.basename(f) }
+  spec.test_files    = spec.files.grep(%r{^(test|spec|features)/})
+  spec.require_paths = ['lib']
+
+  spec.add_dependency 'activesupport', '>= 3.0'
+
+  spec.add_development_dependency 'bundler'
+  spec.add_development_dependency 'rake'
+  spec.add_development_dependency 'rspec', '~> 2.14.0'
+  spec.add_development_dependency 'mock_redis'
+  spec.add_development_dependency 'timecop'
+  spec.add_development_dependency 'codeclimate-test-reporter', '>= 0.4.1'
+  spec.add_development_dependency 'simplecov'
+  spec.add_development_dependency 'cane', '>= 2.6.0'
+  spec.add_development_dependency 'bundler-audit'
+  spec.add_development_dependency 'apress-changelogger'
 end
diff --git a/tasks/changelog.rake b/tasks/changelog.rake
new file mode 100644
index 0000000..13d2966
--- /dev/null
+++ b/tasks/changelog.rake
@@ -0,0 +1,6 @@
+desc 'Generate CHANGELOG.md'
+task :changelog do
+  require 'apress/changelogger'
+  Apress::ChangeLogger.new.log_changes
+  spawn "git add CHANGELOG.md"
+end
diff --git a/tasks/gem.rake b/tasks/gem.rake
deleted file mode 100644
index 15ceaac..0000000
--- a/tasks/gem.rake
+++ /dev/null
@@ -1,93 +0,0 @@
-# coding: utf-8
-
-desc 'Release gem (build and upload to gem repo)'
-task :release => [
-  :ensure_master,
-  :check,
-  'version:release',
-  :build,
-  :tag,
-  :push,
-  :upload
-]
-
-desc 'Build project into pkg directory'
-task :build do
-  FileUtils.mkdir_p('pkg')
-
-  gemspec = "#{project}.gemspec"
-  spawn("gem build -V #{gemspec}")
-  built_gem_path = Dir["#{project}-*.gem"].sort_by{|f| File.mtime(f)}.last
-
-  FileUtils.mv(built_gem_path, 'pkg')
-end
-
-desc 'Mark project as stable with version tag'
-task :tag do
-  tag_name = "v#{current_version}"
-
-  spawn("git tag -a -m \"Version #{current_version}\" #{tag_name}")
-  puts "Tag #{tag_name} created"
-end
-
-task :push do
-  spawn 'git push'
-  spawn 'git push --tags'
-end
-
-# upload built tarballs to repo
-task :upload do
-  require 'uri'
-  require 'net/http/post/multipart'
-
-  repo = gems_sources.grep(/railsc/).first
-  uri = URI.parse(repo)
-
-  tarball_name = "#{project}-#{current_version}.gem"
-  upload_gem(uri.dup, tarball_name)
-end
-
-task :ensure_master do
-  `git rev-parse --abbrev-ref HEAD`.chomp.strip == 'master' || abort("Can be released only from `master` branch")
-end
-
-def upload_gem(repo_uri, tarball_name)
-  require 'net/http/post/multipart'
-  repo_uri.path = '/upload'
-
-  tarball_path = File.join('pkg', tarball_name)
-
-  File.open(tarball_path) do |gem|
-    req = Net::HTTP::Post::Multipart.new repo_uri.path,
-                                         "file" => UploadIO.new(gem, "application/x-tar", tarball_name)
-
-    req.basic_auth(repo_uri.user, repo_uri.password) if repo_uri.user
-
-    res = Net::HTTP.start(repo_uri.host, repo_uri.port) do |http|
-      http.request(req)
-    end
-
-    if [200, 302].include?(res.code.to_i)
-      puts "#{tarball_name} uploaded successfully"
-    else
-      $stderr.puts "Cannot upload #{tarball_name}. Response status: #{res.code}"
-      exit(1)
-    end
-  end # File.open
-end
-
-task :clean do
-  FileUtils.rm_f 'Gemfile.lock'
-end
-
-def gems_sources
-  Bundler.
-      setup. # get bundler runtime
-      specs. # for each spec
-      map(&:source). # get its sources
-      select { |v| Bundler::Source::Rubygems === v }. # fetch only rubygems-like repos
-      map(&:remotes). # get all remotes
-      flatten.
-      uniq.
-      map(&:to_s)
-end
\ No newline at end of file
diff --git a/tasks/support.rb b/tasks/support.rb
index 4507304..070d698 100644
--- a/tasks/support.rb
+++ b/tasks/support.rb
@@ -22,19 +22,3 @@ def spawn(cmd)
   end
   abort "#{cmd} failed" unless $? && $?.exitstatus == 0
 end
-
-def project
-  'redis_counters'
-end
-
-# get current version from VERSION file
-def current_version
-  File.read(File.join(ROOT, 'VERSION')).strip.chomp
-end
-
-# get released version from git
-def released_version
-  /\Av([\d\.]+)\z/ === `git describe --tags --abbrev=0 2>/dev/null || echo 'v0.0.0'`.chomp.strip
-
-  $1
-end
\ No newline at end of file
diff --git a/tasks/version.rake b/tasks/version.rake
deleted file mode 100644
index 125238e..0000000
--- a/tasks/version.rake
+++ /dev/null
@@ -1,35 +0,0 @@
-# coding: utf-8
-namespace :version do
-  task :current do
-    puts current_version
-  end
-
-  desc 'Write a version from VERSION file to project lib/**/version.rb'
-  task :update do
-    Dir['lib/**/version.rb'].each do |file|
-      contents = File.read(file)
-      contents.gsub!(/VERSION\s*=\s*(['"])(.*?)\1/m, "VERSION = '#{current_version}'")
-      File.write(file, contents)
-    end
-  end
-
-  desc 'Put version files to repo'
-  task :commit do
-    Dir['lib/**/version.rb'].each do |file|
-      spawn "git add #{file}"
-    end
-    # git diff --exit-code returns 0 if nothing was changed and 1 otherwise
-    spawn "git diff --cached --exit-code > /dev/null || git commit -m \"Release #{current_version}\" || echo -n"
-  end
-
-  desc 'Release new version'
-  task :release => [:changelog, :update, :commit]
-
-  desc 'Generate CHANGELOG file'
-  task :changelog do
-    changelog = File.join(ROOT, 'CHANGELOG')
-
-    spawn "changelogger changelog '#{ROOT}' --top_version='v#{current_version}' > '#{changelog}'"
-    spawn "git add '#{changelog}'"
-  end
-end
\ No newline at end of file