diff --git a/.github/workflows/publish.yaml b/.github/workflows/publish.yaml
new file mode 100644
index 0000000..74e0f45
--- /dev/null
+++ b/.github/workflows/publish.yaml
@@ -0,0 +1,30 @@
+name: Publish
+
+on :
+  release:
+    types: [published]
+
+jobs:
+  push:
+    runs-on: ubuntu-latest
+
+    permissions:
+      contents: write
+      id-token: write
+
+    # If you configured a GitHub environment on RubyGems, you must use it here.
+    environment: release
+
+    steps:
+      # Set up
+      - uses: actions/checkout@v5
+        with:
+          persist-credentials: false
+      - name: Set up Ruby
+        uses: ruby/setup-ruby@v1
+        with:
+          bundler-cache: true
+          ruby-version: ruby
+
+      # Release
+      - uses: rubygems/release-gem@v1
diff --git a/.github/workflows/ruby.yml b/.github/workflows/runtests.yml
similarity index 98%
rename from .github/workflows/ruby.yml
rename to .github/workflows/runtests.yml
index 98b525d..c1b8d51 100644
--- a/.github/workflows/ruby.yml
+++ b/.github/workflows/runtests.yml
@@ -5,7 +5,7 @@
 # This workflow will download a prebuilt Ruby version, install dependencies and run tests with Rake
 # For more information see: https://github.com/marketplace/actions/setup-ruby-jruby-and-truffleruby
 
-name: Ruby
+name: Run tests
 
 on:
   push:
diff --git a/alns.gemspec b/alns.gemspec
index fe19de7..5775122 100644
--- a/alns.gemspec
+++ b/alns.gemspec
@@ -1,15 +1,15 @@
 # frozen_string_literal: true
 
-Gem::Specification.new do |s|
+require './lib/alns/version'
+
+ALNS::GEMSPEC = Gem::Specification.new do |s|
   s.name          = 'alns'
-  s.version       = '0.1.0'
+  s.version       = ALNS::VERSION
   s.summary       = 'Adaptive Large Neighbourhood Search'
-  s.description   = ''
   s.authors       = ['bibenga']
   s.email         = 'bibenga@users.noreply.github.com'
   s.files         = Dir['LICENSE', 'lib/**/*.rb']
   s.require_paths = ['lib']
-  # s.homepage      = 'https://rubygems.org/gems/example'
   s.homepage      = 'https://github.com/bibenga/alns-ruby'
   s.metadata      = { 'source_code_uri' => 'https://github.com/bibenga/alns-ruby' }
   s.license       = 'MIT'
diff --git a/lib/alns/version.rb b/lib/alns/version.rb
new file mode 100644
index 0000000..03a6f7a
--- /dev/null
+++ b/lib/alns/version.rb
@@ -0,0 +1,5 @@
+# frozen_string_literal: true
+
+module ALNS
+  VERSION = '0.1.1'
+end