diff --git a/.github/PULL_REQUEST_TEMPLATE.md b/.github/PULL_REQUEST_TEMPLATE.md
index 535af67..1039f97 100644
--- a/.github/PULL_REQUEST_TEMPLATE.md
+++ b/.github/PULL_REQUEST_TEMPLATE.md
@@ -31,7 +31,7 @@ The following have **NOT** been modified
 - [ ] doc/ - will be updated upon versioned release
 - [ ] .ruby-gemset
 - [ ] .ruby-version
+- [ ] CHANGELOG.md - will be updated upon versioned release (HISTORY.md is deprecated)
 - [ ] Gemfile
-- [ ] HISTORY.md - will be updated upon versioned release
 - [ ] LICENSE
 - [ ] VERSION - will be updated upon versioned release
diff --git a/.github_changelog_generator b/.github_changelog_generator
new file mode 100644
index 0000000..7ef9f2f
--- /dev/null
+++ b/.github_changelog_generator
@@ -0,0 +1,8 @@
+add_issues_wo_labels=false
+add_pr_wo_labels=false
+enhancement-labels=Type: Enhancement,Type: Feature Request
+bug-labels=Type: Bug
+exclude-labels=Type: Question
+header=# ModbusMaster CHANGELOG
+include-labels=Type: Bug,Type: Enhancement,Type: Feature Request,Type: Maintenance
+future-release=Unreleased
diff --git a/.gitignore b/.gitignore
index 3ccd828..527cdde 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,2 @@
 doc/html/
 doc/latex/
-Gemfile.lock
diff --git a/.ruby-version b/.ruby-version
index 76521af..2bf1c1c 100644
--- a/.ruby-version
+++ b/.ruby-version
@@ -1 +1 @@
-ruby-2.2.0
+2.3.1
diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 0000000..5fce599
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,112 @@
+# ModbusMaster CHANGELOG
+
+## [v1.0.0](https://github.com/4-20ma/ModbusMaster/tree/v1.0.0) (2016-09-11)
+[Full Changelog](https://github.com/4-20ma/ModbusMaster/compare/v0.11.0...v1.0.0)
+
+**Implemented enhancements:**
+
+- Add continuous integration testing with travis [\#55](https://github.com/4-20ma/ModbusMaster/issues/55)
+- Add Code of Conduct [\#54](https://github.com/4-20ma/ModbusMaster/issues/54)
+- Create PULL\_REQUEST\_TEMPLATE [\#49](https://github.com/4-20ma/ModbusMaster/issues/49)
+- Create ISSUE\_TEMPLATE [\#48](https://github.com/4-20ma/ModbusMaster/issues/48)
+- Change license to Apache 2.0 [\#45](https://github.com/4-20ma/ModbusMaster/issues/45)
+- Set \_\_MODBUSMASTER\_DEBUG\_\_ to 0 by default [\#35](https://github.com/4-20ma/ModbusMaster/issues/35)
+- Pass Stream object instead of integer reference [\#17](https://github.com/4-20ma/ModbusMaster/issues/17)
+- Add LICENSE, convert project to Apache 2.0 [\#67](https://github.com/4-20ma/ModbusMaster/pull/67) ([4-20ma](https://github.com/4-20ma))
+- Add example sketch for half-duplex RS485 [\#66](https://github.com/4-20ma/ModbusMaster/pull/66) ([kintel](https://github.com/kintel))
+- Add continuous integration testing with Travis CI [\#63](https://github.com/4-20ma/ModbusMaster/pull/63) ([4-20ma](https://github.com/4-20ma))
+- Add initial .travis.yml configuration [\#62](https://github.com/4-20ma/ModbusMaster/pull/62) ([4-20ma](https://github.com/4-20ma))
+- Add CODE\_OF\_CONDUCT [\#56](https://github.com/4-20ma/ModbusMaster/pull/56) ([4-20ma](https://github.com/4-20ma))
+- Add initial PULL\_REQUEST\_TEMPLATE [\#53](https://github.com/4-20ma/ModbusMaster/pull/53) ([4-20ma](https://github.com/4-20ma))
+- Add initial ISSUE\_TEMPLATE [\#50](https://github.com/4-20ma/ModbusMaster/pull/50) ([4-20ma](https://github.com/4-20ma))
+- Add preTransmission\(\), postTransmission\(\) for half-duplex [\#44](https://github.com/4-20ma/ModbusMaster/pull/44) ([kintel](https://github.com/kintel))
+- Disable \_\_MODBUSMASTER\_DEBUG\_\_ mode by default [\#43](https://github.com/4-20ma/ModbusMaster/pull/43) ([kintel](https://github.com/kintel))
+- Add STYLE coding style guide [\#29](https://github.com/4-20ma/ModbusMaster/pull/29) ([4-20ma](https://github.com/4-20ma))
+
+**Closed issues:**
+
+- Fix documentation references in ModbusMaster.h, .cpp [\#69](https://github.com/4-20ma/ModbusMaster/issues/69)
+- Clean up template wording [\#64](https://github.com/4-20ma/ModbusMaster/issues/64)
+- Add Label section to CONTRIBUTING [\#60](https://github.com/4-20ma/ModbusMaster/issues/60)
+- Update README contact information [\#58](https://github.com/4-20ma/ModbusMaster/issues/58)
+
+**Merged pull requests:**
+
+- Clean up ISSUE/PULL\_REQUEST templates [\#65](https://github.com/4-20ma/ModbusMaster/pull/65) ([4-20ma](https://github.com/4-20ma))
+- Add label guidance to CONTRIBUTING [\#61](https://github.com/4-20ma/ModbusMaster/pull/61) ([4-20ma](https://github.com/4-20ma))
+- Update README contact information [\#59](https://github.com/4-20ma/ModbusMaster/pull/59) ([4-20ma](https://github.com/4-20ma))
+- Add email address to CODE\_OF\_CONDUCT [\#57](https://github.com/4-20ma/ModbusMaster/pull/57) ([4-20ma](https://github.com/4-20ma))
+- Clarify instructions in ISSUE\_TEMPLATE [\#52](https://github.com/4-20ma/ModbusMaster/pull/52) ([4-20ma](https://github.com/4-20ma))
+- Add ISSUE\_TEMPLATE title reqs, separator lines [\#51](https://github.com/4-20ma/ModbusMaster/pull/51) ([4-20ma](https://github.com/4-20ma))
+
+## [v0.11.0](https://github.com/4-20ma/ModbusMaster/tree/v0.11.0) (2015-05-22)
+[Full Changelog](https://github.com/4-20ma/ModbusMaster/compare/v0.10.3...v0.11.0)
+
+**Implemented enhancements:**
+
+- Update architecture switch to match Arduino convention [\#27](https://github.com/4-20ma/ModbusMaster/issues/27)
+- Request timeout is impatient [\#3](https://github.com/4-20ma/ModbusMaster/issues/3)
+- Update architecture switch [\#28](https://github.com/4-20ma/ModbusMaster/pull/28) ([4-20ma](https://github.com/4-20ma))
+
+## [v0.10.3](https://github.com/4-20ma/ModbusMaster/tree/v0.10.3) (2015-05-22)
+[Full Changelog](https://github.com/4-20ma/ModbusMaster/compare/v0.10.2...v0.10.3)
+
+**Closed issues:**
+
+- Inconsistent Doxygen comments [\#25](https://github.com/4-20ma/ModbusMaster/issues/25)
+- Replace C macros with inline functions [\#18](https://github.com/4-20ma/ModbusMaster/issues/18)
+
+**Merged pull requests:**
+
+- Adjust doxygen comments to be consistent [\#26](https://github.com/4-20ma/ModbusMaster/pull/26) ([4-20ma](https://github.com/4-20ma))
+- Replace C macros w/inline functions [\#24](https://github.com/4-20ma/ModbusMaster/pull/24) ([4-20ma](https://github.com/4-20ma))
+
+## [v0.10.2](https://github.com/4-20ma/ModbusMaster/tree/v0.10.2) (2015-05-22)
+[Full Changelog](https://github.com/4-20ma/ModbusMaster/compare/v0.9.1...v0.10.2)
+
+**Implemented enhancements:**
+
+- Implement CRC16 for SAM3X8E microprocessor [\#11](https://github.com/4-20ma/ModbusMaster/pull/11) ([4-20ma](https://github.com/4-20ma))
+- Add rx flush, change response timeout to 2000 ms [\#10](https://github.com/4-20ma/ModbusMaster/pull/10) ([agprimatic](https://github.com/agprimatic))
+
+**Fixed bugs:**
+
+- Fix documentation build error [\#23](https://github.com/4-20ma/ModbusMaster/pull/23) ([4-20ma](https://github.com/4-20ma))
+- Work around HardwareSerial for SAM3 micro [\#12](https://github.com/4-20ma/ModbusMaster/pull/12) ([4-20ma](https://github.com/4-20ma))
+
+**Merged pull requests:**
+
+- Update pointers to match C++ convention [\#22](https://github.com/4-20ma/ModbusMaster/pull/22) ([4-20ma](https://github.com/4-20ma))
+- Rename markdown file extensions [\#21](https://github.com/4-20ma/ModbusMaster/pull/21) ([4-20ma](https://github.com/4-20ma))
+
+## [v0.9.1](https://github.com/4-20ma/ModbusMaster/tree/v0.9.1) (2013-01-02)
+[Full Changelog](https://github.com/4-20ma/ModbusMaster/compare/v0.9...v0.9.1)
+
+## [v0.9](https://github.com/4-20ma/ModbusMaster/tree/v0.9) (2011-12-27)
+[Full Changelog](https://github.com/4-20ma/ModbusMaster/compare/v0.8...v0.9)
+
+## [v0.8](https://github.com/4-20ma/ModbusMaster/tree/v0.8) (2011-11-09)
+[Full Changelog](https://github.com/4-20ma/ModbusMaster/compare/v0.7...v0.8)
+
+## [v0.7](https://github.com/4-20ma/ModbusMaster/tree/v0.7) (2010-02-10)
+[Full Changelog](https://github.com/4-20ma/ModbusMaster/compare/v0.6...v0.7)
+
+## [v0.6](https://github.com/4-20ma/ModbusMaster/tree/v0.6) (2010-02-05)
+[Full Changelog](https://github.com/4-20ma/ModbusMaster/compare/v0.5...v0.6)
+
+## [v0.5](https://github.com/4-20ma/ModbusMaster/tree/v0.5) (2010-01-30)
+[Full Changelog](https://github.com/4-20ma/ModbusMaster/compare/v0.4...v0.5)
+
+## [v0.4](https://github.com/4-20ma/ModbusMaster/tree/v0.4) (2010-01-30)
+[Full Changelog](https://github.com/4-20ma/ModbusMaster/compare/v0.3...v0.4)
+
+## [v0.3](https://github.com/4-20ma/ModbusMaster/tree/v0.3) (2010-01-29)
+[Full Changelog](https://github.com/4-20ma/ModbusMaster/compare/v0.2...v0.3)
+
+## [v0.2](https://github.com/4-20ma/ModbusMaster/tree/v0.2) (2010-01-26)
+[Full Changelog](https://github.com/4-20ma/ModbusMaster/compare/v0.1...v0.2)
+
+## [v0.1](https://github.com/4-20ma/ModbusMaster/tree/v0.1) (2010-01-25)
+
+
+\* *This Change Log was automatically generated by [github_changelog_generator](https://github.com/skywinder/Github-Changelog-Generator)*
\ No newline at end of file
diff --git a/Gemfile b/Gemfile
index f89d5c7..9ed6466 100644
--- a/Gemfile
+++ b/Gemfile
@@ -18,8 +18,9 @@ source 'https://rubygems.org'
 
 
 # place general project gems in this section (alphabetical order) ____________
-gem 'git', '~> 1.2.9'     # git management
-gem 'rake', '~> 10.3.2'
+gem 'git', '~> 1.3.0'     # git management
+gem 'github_changelog_generator', '~> 1.13.1'
+gem 'rake', '~> 11.2.2'
 gem 'version', '~> 1.0.0' # version management gem
 
 
diff --git a/Gemfile.lock b/Gemfile.lock
new file mode 100644
index 0000000..cdec147
--- /dev/null
+++ b/Gemfile.lock
@@ -0,0 +1,47 @@
+GEM
+  remote: https://rubygems.org/
+  specs:
+    addressable (2.4.0)
+    colorize (0.8.1)
+    descendants_tracker (0.0.4)
+      thread_safe (~> 0.3, >= 0.3.1)
+    faraday (0.9.2)
+      multipart-post (>= 1.2, < 3)
+    git (1.3.0)
+    github_api (0.14.5)
+      addressable (~> 2.4.0)
+      descendants_tracker (~> 0.0.4)
+      faraday (~> 0.8, < 0.10)
+      hashie (>= 3.4)
+      oauth2 (~> 1.0)
+    github_changelog_generator (1.13.1)
+      colorize (~> 0.7)
+      github_api (~> 0.12)
+      rake (>= 10.0)
+    hashie (3.4.4)
+    jwt (1.5.4)
+    multi_json (1.12.1)
+    multi_xml (0.5.5)
+    multipart-post (2.0.0)
+    oauth2 (1.2.0)
+      faraday (>= 0.8, < 0.10)
+      jwt (~> 1.0)
+      multi_json (~> 1.3)
+      multi_xml (~> 0.5)
+      rack (>= 1.2, < 3)
+    rack (2.0.1)
+    rake (11.2.2)
+    thread_safe (0.3.5)
+    version (1.0.0)
+
+PLATFORMS
+  ruby
+
+DEPENDENCIES
+  git (~> 1.3.0)
+  github_changelog_generator (~> 1.13.1)
+  rake (~> 11.2.2)
+  version (~> 1.0.0)
+
+BUNDLED WITH
+   1.12.1
diff --git a/HISTORY.md b/HISTORY.md
deleted file mode 100644
index b1c13fe..0000000
--- a/HISTORY.md
+++ /dev/null
@@ -1,98 +0,0 @@
-## [v0.11.0 (2015-05-22)](https://github.com/4-20ma/ModbusMaster/tree/v0.11.0)
-- Fix grammar in library.properties
-- Fix broken links in HISTORY, Rakefile
-- Add RX flush, increase response timeout
-- Insert missing space
-- Add comment clarifying flush() is tx buffer only
-- Fix MBSerial pointer from . to ->
-- Update architecture switch
-
----
-## [v0.10.3 (2015-05-22)](https://github.com/4-20ma/ModbusMaster/tree/v0.10.3)
-- Adjust doxygen comments to be consistent
-- Replace C macros w/inline functions
-- Update library.properties to conform to others
-- Adjust README links to use absolute URLs
-
----
-## [v0.10.2 (2015-05-21)](https://github.com/4-20ma/ModbusMaster/tree/v0.10.2)
-- Update documentation after resolving doc build err
-- Fix documentation build error
-- Update library.properties
-- Add README badges for tag, license
-- Update README
-    - Replace **Heading** with Heading followed by ------- line for cleaner Markdown syntax
-    - Update Arduino version note to 1.6
-    - Fix nanoline URL
-- Remove deprecation note from README
-- Update pointers to match C++ convention
-- Rename markdown file extensions
-
----
-## v0.10.1 (2015-05-20)
-- Update Rakefile to commit Doxyfile, reference
-- Version bump to v0.10.0
-
----
-## v0.10.0 (2015-05-20)
-- Update Rakefile to update library.properties
-- Add library.properties file to describe library
-- Add .ruby-* to manage versions via rvm or rbenv
-- Add Gemfile to manage dependencies via Bundler
-- Update .gitignore to exclude Gemfile.lock
-- Work around HardwareSerial for SAM3 micro
-    - add #ifdefs to check for presence of AVR or ARM chipset (use HardwareSerial for AVR and UARTClass for ARM)
-    - change MBSerial to pointer and update all references to use -> notation instead of . notation
-- Implement CRC16 for SAM3X8E microprocessor
-    - renamed _crc16_update to crc16_update to minimize confusion with AVR function in util/crc16.h
-    - added C version of crc16 and removed extraneous version of crc16 functions
-- Add end-of-life note to README
-- Add auto-generated pdf documentation for v0.9.1
-- Remove pdf documentation for versions 0.6, 0.7
-- Add pdf documentation for versions 0.6, 0.7
-- Remove unnecessary require 'fileutils'
-- Add auto-generated pdf documentation
-- Define PROJECT_BRIEF tag in Doxyfile
-- Add pdf generation to prepare:documentation
-- Add doc/README.txt
-
----
-## [v0.9.1 (2013-01-02)](https://github.com/4-20ma/ModbusMaster/tree/v0.9.1)
-- Add Rakefile to manage prepare/release process
-- Add .gitignore to skip doc/html, doc/latex files
-- Add Doxyfile to repo
-- Update copyright year
-- Update email address
-- Fix references to repo
-- Move history to separate file
-- Update README copyright, email
-
----
-## [v0.9 (2011-12-04)](https://github.com/4-20ma/ModbusMaster/tree/v0.9)
-- Add support for Arduino 1.0
-
----
-## [v0.8 (2011-11-09)](https://github.com/4-20ma/ModbusMaster/tree/v0.8)
-- Add support for ATmega2560
-
----
-## [v0.7 (2010-02-09)](https://github.com/4-20ma/ModbusMaster/tree/v0.7)
-- Modified capitalization of functions to match Arduino style where first letter is lower-case
-
----
-## [v0.6 (2010-02-04)](https://github.com/4-20ma/ModbusMaster/tree/v0.6)
-- Added documentation via Doxygen comments, modified methods used to get/set storage buffers
-
----
-## [v0.5 (2010-01-30)](https://github.com/4-20ma/ModbusMaster/tree/v0.5)
-- Added ability to select serial port 0..3, modified methods used to get/set storage arrays, miscellaneous bug fixes
-
----
-## [v0.3 (2010-01-29)](https://github.com/4-20ma/ModbusMaster/tree/v0.3)
-
----
-## [v0.2 (2010-01-25)](https://github.com/4-20ma/ModbusMaster/tree/v0.2)
-
----
-## [v0.1 (2010-01-24)](https://github.com/4-20ma/ModbusMaster/tree/v0.1)
-- Initial public release
diff --git a/Rakefile b/Rakefile
index e634c5f..82e021d 100644
--- a/Rakefile
+++ b/Rakefile
@@ -16,11 +16,18 @@
 #
 
 require 'git'
+require 'github_changelog_generator/task'
 require 'rake'
 require 'rubygems'
 require 'rake/version_task'         # gem install version
 require 'version'
 
+# requires additional packages on MacOS (including Homebrew):
+# $ /usr/bin/ruby -e "$(curl -fsSL \
+#   https://raw.githubusercontent.com/Homebrew/install/master/install)"
+# $ brew install doxygen        # generates documentation from source code
+# $ brew cask install mactex    # MacTeX
+
 Rake::VersionTask.new do |task|
   # prevent auto-commit on version bump
   task.with_git = false
@@ -32,7 +39,7 @@ DOXYFILE        = 'Doxyfile'
 GITHUB_USERNAME = '4-20ma'
 GITHUB_REPO     = 'ModbusMaster'
 HEADER_FILE     = "#{GITHUB_REPO}.h"
-HISTORY_FILE    = 'HISTORY.md'
+CHANGELOG_FILE  = 'CHANGELOG.md'
 PROPERTIES_FILE = 'library.properties'
 VERSION_FILE    = Version.version_file('').basename.to_s
 
@@ -42,97 +49,96 @@ task :default => :info
 desc 'Display instructions for public release'
 task :info do
   puts <<-EOF.gsub(/^\s{2}/, '')
-  
+
   Instructions for public release
-  
+
   - Update version, as appropriate:
-  
+
     $ rake version:bump           # or
     $ rake version:bump:minor     # or
     $ rake version:bump:major     # or
     edit 'VERSION' file directly
-    
-  - Prepare release date, 'HISTORY.md' file, documentation:
-  
+
+  - Prepare release date, 'CHANGELOG.md' file, documentation:
+
     $ rake prepare
-    
-  - Review changes to 'HISTORY.md' file
+
+  - Review changes to 'CHANGELOG.md' file
     This file is assembled using git commit messages; review for completeness.
-  
+
   - Review html documentation files
     These files are assembled using source code Doxygen tags; review for
     for completeness.
-  
+
   - Add & commit source files, tag, push to origin/master;
     add & commit documentation files, push to origin/gh-pages:
-  
+
     $ rake release
-    
+
   EOF
 end # task :info
 
 
-desc 'Prepare HISTORY file for release'
+desc "Prepare #{CHANGELOG_FILE} for release"
 task :prepare => 'prepare:default'
 
 namespace :prepare do
   task :default => [
     :release_date,
     :library_properties,
-    :history,
+    :changelog,
     :documentation
   ]
-  
+
   desc 'Prepare documentation'
   task :documentation do
     version = Version.current.to_s
-    
+
     # update parameters in Doxyfile
     file = File.join(CWD, 'doc', DOXYFILE)
-    
+
     contents = IO.read(file)
     contents.sub!(/(^PROJECT_NUMBER\s*=)(.*)$/) do |match|
       "#{$1} v#{version}"
     end # contents.sub!(...)
     IO.write(file, contents)
-    
+
     # chdir to doc/ and call doxygen to update documentation
     Dir.chdir(to = File.join(CWD, 'doc'))
     system('doxygen', DOXYFILE)
-    
+
     # chdir to doc/latex and call doxygen to update documentation
     Dir.chdir(from = File.join(CWD, 'doc', 'latex'))
     system('make')
-    
+
     # move/rename file to 'doc/GITHUB_REPO reference-x.y.pdf'
     FileUtils.mv(File.join(from, 'refman.pdf'),
       File.join(to, "#{GITHUB_REPO} reference-#{version}.pdf"))
   end # task :documentation
-  
+
   desc 'Prepare release history'
-  task :history, :tag do |t, args|
-    g = Git.open(CWD)
-    
-    current_tag = args[:tag] || Version.current.to_s
-    prior_tag = g.tags.last
-    
-    history = "## [v#{current_tag} (#{Time.now.strftime('%Y-%m-%d')})]"
-    history << "(https://github.com/#{GITHUB_USERNAME}/#{GITHUB_REPO}/tree"
-    history << "/v#{current_tag})\n"
-    
-    commits = prior_tag ? g.log.between(prior_tag) : g.log
-    history << commits.map do |commit|
-      "- #{commit.message}"
-    end.join("\n")
-    history << "\n\n---\n"
-    
-    file = File.join(CWD, HISTORY_FILE)
-    puts "Updating file #{file}:"
-    puts history
-    contents = IO.read(file)
-    IO.write(file, history << contents)
-  end # task :history
-  
+  GitHubChangelogGenerator::RakeTask.new(:changelog) do |config|
+    config.add_issues_wo_labels = false
+    config.add_pr_wo_labels = false
+    config.enhancement_labels = [
+      'Type: Enhancement',
+      'Type: Feature Request'
+    ]
+    config.bug_labels = ['Type: Bug']
+    config.exclude_labels = ['Type: Question']
+    config.header = '# ModbusMaster CHANGELOG'
+    config.include_labels = [
+      'Type: Bug',
+      'Type: Enhancement',
+      'Type: Feature Request',
+      'Type: Maintenance'
+    ]
+    # config.since_tag = '0.1.0'
+    config.future_release = "v#{Version.current.to_s}"
+    config.user = GITHUB_USERNAME
+    config.project = GITHUB_REPO
+  end # GitHubChangelogGenerator::RakeTask.new
+
   desc 'Update version in library properties file'
   task :library_properties do
     version = Version.current.to_s
@@ -149,14 +155,14 @@ namespace :prepare do
   desc 'Update release date in header file'
   task :release_date do
     file = File.join(CWD, HEADER_FILE)
-    
+
     contents = IO.read(file)
     contents.sub!(/(\\date\s*)(.*)$/) do |match|
       "#{$1}#{Time.now.strftime('%-d %b %Y')}"
     end # contents.sub!(...)
     IO.write(file, contents)
   end # task :release_date
-  
+
 end # namespace :prepare
 
 
@@ -165,21 +171,21 @@ task :release => 'release:default'
 
 namespace :release do
   task :default => [:source, :documentation]
-  
+
   desc 'Commit documentation changes related to version bump'
   task :documentation do
     version = Version.current.to_s
     cwd = File.expand_path(File.join(File.dirname(__FILE__), 'doc', 'html'))
     g = Git.open(cwd)
-    
+
     # `git add .`
     g.add
-    
+
     # remove each deleted item
     g.status.deleted.each do |item|
       g.remove(item[0])
     end # g.status.deleted.each
-    
+
     # commit changes if items added, changed, or deleted
     if g.status.added.size > 0 || g.status.changed.size > 0 ||
       g.status.deleted.size > 0 then
@@ -188,19 +194,19 @@ namespace :release do
     else
       puts "No changes to commit v#{version}"
     end # if g.status.added.size > 0 || g.status.changed.size > 0...
-    
+
     g.push('origin', 'gh-pages')
   end # task :documentation
-  
+
   desc 'Commit source changes related to version bump'
   task :source do
     version = Version.current.to_s
     `git add doc/#{DOXYFILE} "doc/#{GITHUB_REPO} reference-#{version}.pdf" \
-      #{HEADER_FILE} #{HISTORY_FILE} #{PROPERTIES_FILE} #{VERSION_FILE}`
+      #{HEADER_FILE} #{CHANGELOG_FILE} #{PROPERTIES_FILE} #{VERSION_FILE}`
     `git commit -m 'Version bump to v#{version}'`
     `git tag -a -f -m 'Version v#{version}' v#{version}`
     `git push origin master`
     `git push --tags`
   end # task :source
-  
+
 end # namespace :release
diff --git a/VERSION b/VERSION
index d9df1bb..3eefcb9 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-0.11.0
+1.0.0
diff --git a/doc/Doxyfile b/doc/Doxyfile
index 23e0754..00733bd 100644
--- a/doc/Doxyfile
+++ b/doc/Doxyfile
@@ -38,7 +38,7 @@ PROJECT_NAME           = "ModbusMaster"
 # could be handy for archiving the generated documentation or if some version
 # control system is used.
 
-PROJECT_NUMBER         = v0.11.0
+PROJECT_NUMBER         = v1.0.0
 
 # Using the PROJECT_BRIEF tag one can provide an optional one line description
 # for a project that appears at the top of each page and should give viewer a
diff --git a/doc/ModbusMaster reference-1.0.0.pdf b/doc/ModbusMaster reference-1.0.0.pdf
new file mode 100644
index 0000000..ce91a38
Binary files /dev/null and b/doc/ModbusMaster reference-1.0.0.pdf differ
diff --git a/library.properties b/library.properties
index e4a048f..0054a4d 100644
--- a/library.properties
+++ b/library.properties
@@ -1,5 +1,5 @@
 name=ModbusMaster
-version=0.11.0
+version=1.0.0
 author=Doc Walker
 maintainer=Doc Walker <4-20ma@wvfans.net>
 sentence=Enlighten your Arduino to be a Modbus master.