diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 6d1b24c..604a9d0 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -19,7 +19,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby: ['3.0', 3.1, 3.2, ruby-head, jruby]
+        ruby: ['3.0', 3.1, 3.2, 3.3, ruby-head, jruby]
     steps:
       - name: Clone repository
         uses: actions/checkout@v3
@@ -33,6 +33,6 @@ jobs:
         run: ruby --version; bundle exec rspec spec || $ALLOW_FAILURES
       - name: Coveralls GitHub Action
         uses: coverallsapp/github-action@v2
-        if: "matrix.ruby == '3.2'"
+        if: "matrix.ruby == '3.3'"
         with:
           github-token: ${{ secrets.GITHUB_TOKEN }}
diff --git a/README.md b/README.md
index 3801b35..3033d76 100755
--- a/README.md
+++ b/README.md
@@ -79,6 +79,10 @@ The reader exposes a `#rdfa` method, which can be used to retrieve the transform
 ## Author
 * [Gregg Kellogg](https://github.com/gkellogg) - <https://greggkellogg.net/>
 
+## Change Log
+
+See [Release Notes on GitHub](https://github.com/ruby-rdf/rdf-microdata/releases)
+
 ## Contributing
 
 * Do your best to adhere to the existing coding conventions and idioms.
diff --git a/rdf-microdata.gemspec b/rdf-microdata.gemspec
index d3d09b4..9bb698d 100755
--- a/rdf-microdata.gemspec
+++ b/rdf-microdata.gemspec
@@ -34,6 +34,7 @@ Gem::Specification.new do |gem|
   gem.add_runtime_dependency     'nokogiri' ,       '~> 1.15', '>= 1.15.4'
 
   gem.add_development_dependency 'equivalent-xml' , '~> 0.6'
+  gem.add_development_dependency 'getoptlong',      '~> 0.2'
   gem.add_development_dependency 'yard' ,           '~> 0.9'
   gem.add_development_dependency 'rspec',           '~> 3.12'
   gem.add_development_dependency 'rspec-its',       '~> 1.3'