diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 851489f..58b3451 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -19,7 +19,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby: [2.6, 2.7, '3.0', 3.1, 3.2, ruby-head, jruby]
+        ruby: ['3.0', 3.1, 3.2, ruby-head, jruby]
     steps:
       - name: Clone repository
         uses: actions/checkout@v3
@@ -33,7 +33,7 @@ jobs:
         run: ruby --version; bundle exec rspec spec || $ALLOW_FAILURES
       - name: Coveralls GitHub Action
         uses: coverallsapp/github-action@v2
-        if: "matrix.ruby == '3.0'"
+        if: "matrix.ruby == '3.2'"
         with:
           github-token: ${{ secrets.GITHUB_TOKEN }}
 
diff --git a/VERSION b/VERSION
index 406ebcb..15a2799 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-3.2.7
+3.3.0
diff --git a/rdf-vocab.gemspec b/rdf-vocab.gemspec
index da0558b..1fcd912 100755
--- a/rdf-vocab.gemspec
+++ b/rdf-vocab.gemspec
@@ -25,26 +25,26 @@ Gem::Specification.new do |gem|
   gem.test_files    = Dir.glob('spec/*.rb')
   gem.require_paths = %w(lib)
 
-  gem.required_ruby_version      = '>= 2.6'
+  gem.required_ruby_version      = '>= 3.0'
 
-  gem.add_runtime_dependency     'rdf',              '~> 3.2', '>= 3.2.4'
+  gem.add_runtime_dependency     'rdf',              '~> 3.3'
 
   # Either of these are required for HTML vocabulary generation
-  gem.add_development_dependency 'haml',             '>= 5.2', "< 7"
+  gem.add_development_dependency 'haml',             '~> 6.1'
   gem.add_development_dependency 'erubis',           '~> 2.7'
 
-  gem.add_development_dependency 'json-ld',          '~> 3.2'
-  gem.add_development_dependency 'json-schema',      '~> 2.8'
+  gem.add_development_dependency 'json-ld',          '~> 3.3'
+  gem.add_development_dependency 'json-schema',      '~> 4.0'
   gem.add_development_dependency 'jsonpath',         '~> 1.1'
-  gem.add_development_dependency 'ld-patch',         '~> 3.2'
-  gem.add_development_dependency 'nokogiri',         '~> 1.13', '>= 1.13.8'
+  gem.add_development_dependency 'ld-patch',         '~> 3.3'
+  gem.add_development_dependency 'nokogiri',         '~> 1.15', '>= 1.15.4'
   gem.add_development_dependency 'rake',             '~> 13.0'
-  gem.add_development_dependency 'rdf-ordered-repo', '~> 3.2'
-  gem.add_development_dependency 'rdf-rdfa',         '~> 3.2'
-  gem.add_development_dependency 'rdf-rdfxml',       '~> 3.2'
-  gem.add_development_dependency 'rdf-reasoner',     '~> 0.7'
-  gem.add_development_dependency 'rdf-turtle',       '~> 3.2'
-  gem.add_development_dependency 'rspec',            '~> 3.10'
+  gem.add_development_dependency 'rdf-ordered-repo', '~> 3.3'
+  gem.add_development_dependency 'rdf-rdfa',         '~> 3.3'
+  gem.add_development_dependency 'rdf-rdfxml',       '~> 3.3'
+  gem.add_development_dependency 'rdf-reasoner',     '~> 0.8'
+  gem.add_development_dependency 'rdf-turtle',       '~> 3.3'
+  gem.add_development_dependency 'rspec',            '~> 3.12'
   gem.add_development_dependency 'rspec-its',        '~> 1.3'
   gem.add_development_dependency 'uuidtools',        '~> 2.2' # needed by json-schema
   gem.add_development_dependency 'yard',             '~> 0.9'