diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 00b888b..9b51df4 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 8a9bfa4..2090fc3 100755
--- a/README.md
+++ b/README.md
@@ -65,7 +65,11 @@ The reader uses the [Turtle][Turtle doc] parser. The writer also is based on the
 The syntax is compatible with placing default triples within `{}`, but the writer does not use this for writing triples in the default graph.
 
 There is a new `:stream` option to {RDF::TriG::Writer} which is more efficient for streaming large datasets.
-      
+
+## Change Log
+
+See [Release Notes on GitHub](https://github.com/ruby-rdf/rdf-trig/releases)
+
 ## Dependencies
 
 * [Ruby](https://ruby-lang.org/) (>= 3.0)
diff --git a/rdf-trig.gemspec b/rdf-trig.gemspec
index df1b9b6..27a257e 100755
--- a/rdf-trig.gemspec
+++ b/rdf-trig.gemspec
@@ -30,6 +30,7 @@ Gem::Specification.new do |gem|
   gem.add_runtime_dependency     'rdf',             '~> 3.3'
   gem.add_runtime_dependency     'ebnf',            '~> 2.4'
   gem.add_runtime_dependency     'rdf-turtle',      '~> 3.3'
+  gem.add_development_dependency 'getoptlong',      '~> 0.2'
   gem.add_development_dependency 'json-ld',         '~> 3.3'
   gem.add_development_dependency 'rspec',           '~> 3.12'
   gem.add_development_dependency 'rspec-its',       '~> 1.3'