diff --git a/CHANGELOG.md b/CHANGELOG.md
index 68516e3..84f4838 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,7 @@
 # Unreleased
 
+# 0.14.0
+
 - Make integration & controller specs consistent.
   __Breaking changes__ for controller specs:
     - Changed signature `dispatch(bot, update) => dispatch(update, bot)`.
diff --git a/README.md b/README.md
index aa1b7ce..bbbe782 100644
--- a/README.md
+++ b/README.md
@@ -4,6 +4,8 @@
 [![Code Climate](https://codeclimate.com/github/telegram-bot-rb/telegram-bot/badges/gpa.svg)](https://codeclimate.com/github/telegram-bot-rb/telegram-bot)
 [![Build Status](https://travis-ci.org/telegram-bot-rb/telegram-bot.svg)](https://travis-ci.org/telegram-bot-rb/telegram-bot)
 
+__Breaking changes in v0.14!__ See [upgrading guide](https://github.com/telegram-bot-rb/telegram-bot/wiki/Upgrading-to-0.14).
+
 Tools for developing Telegram bots. Best used with Rails, but can be used in
 [standalone app](https://github.com/telegram-bot-rb/telegram-bot/wiki/Not-rails-application).
 Supposed to be used in webhook-mode in production, and poller-mode
diff --git a/lib/telegram/bot/version.rb b/lib/telegram/bot/version.rb
index d8b1b70..85abe05 100644
--- a/lib/telegram/bot/version.rb
+++ b/lib/telegram/bot/version.rb
@@ -1,6 +1,6 @@
 module Telegram
   module Bot
-    VERSION = '0.13.1'.freeze
+    VERSION = '0.14.0'.freeze
 
     def self.gem_version
       Gem::Version.new VERSION
diff --git a/telegram-bot.gemspec b/telegram-bot.gemspec
index b665ed9..fcb36b6 100644
--- a/telegram-bot.gemspec
+++ b/telegram-bot.gemspec
@@ -17,6 +17,9 @@ Gem::Specification.new do |spec|
   spec.executables   = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }
   spec.require_paths = ['lib']
 
+  spec.post_install_message = 'Breaking changes in v0.14! ' \
+    'See upgrade guide at https://github.com/telegram-bot-rb/telegram-bot/wiki/Upgrading-to-0.14'
+
   spec.required_ruby_version = '~> 2.0'
 
   spec.add_dependency 'actionpack', '>= 4.0', '< 6.0'