diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 16487f8..c9ba8f2 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -20,10 +20,10 @@ jobs:
       fail-fast: false
       matrix:
         ruby:
-          - 2.5
           - 2.6
           - 2.7
           - 3.0
+          - 3.1
           - ruby-head
           - jruby
     steps:
diff --git a/README.md b/README.md
index 1f502c5..d886b88 100755
--- a/README.md
+++ b/README.md
@@ -22,7 +22,7 @@ Install with 'gem install rdf-microdata'
 Microdata to RDF transformation is undergoing active development. This implementation attempts to be up-to-date
 as of the time of release, and is being used in developing the [Microdata RDF][] specification.
 
-This implementation includes support for the proposed [@itemprop-reverse](https://www.w3.org/wiki/WebSchemas/InverseProperties#Proposed_Action:_New_attribute_.40itemprop-reverse) attribute.
+This implementation includes support for the proposed [``@itemprop-reverse``](https://www.w3.org/wiki/WebSchemas/InverseProperties#Proposed_Action:_New_attribute_.40itemprop-reverse) attribute.
 
 ### Microdata Registry
 The parser uses a build-in version of the [Microdata RDF][] registry.
@@ -46,11 +46,11 @@ GRDDL-type triple generation, such as for html>head>title anchor tags.
 If the `RDFa` parser is available, {RDF::Microdata::Format} will not assert content type `text/html` or file extension `.html`, as this is also asserted by RDFa. Instead, the RDFa reader will invoke the microdata reader if an `@itemscope` attribute is detected.
   
 ## Dependencies
-* [RDF.rb](https://rubygems.org/gems/rdf) (~> 3.1)
-* [RDF::RDFa](https://rubygems.org/gems/rdf-xsd) (~> 3.1)
-* [RDF::XSD](https://rubygems.org/gems/rdf-xsd) (~> 3.1)
+* [RDF.rb](https://rubygems.org/gems/rdf) (~> 3.2)
+* [RDF::RDFa](https://rubygems.org/gems/rdf-xsd) (~> 3.2)
+* [RDF::XSD](https://rubygems.org/gems/rdf-xsd) (~> 3.2)
 * [HTMLEntities](https://rubygems.org/gems/htmlentities) ('~> 4.3')
-* [Nokogiri](https://rubygems.org/gems/nokogiri) (~> 1.10)
+* [Nokogiri](https://rubygems.org/gems/nokogiri) (~> 1.12)
 
 ## Documentation
 Full documentation available on [Rubydoc.info][Microdata doc]
diff --git a/VERSION b/VERSION
index 0aec50e..944880f 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-3.1.4
+3.2.0
diff --git a/rdf-microdata.gemspec b/rdf-microdata.gemspec
index f184dbd..022b88f 100755
--- a/rdf-microdata.gemspec
+++ b/rdf-microdata.gemspec
@@ -18,11 +18,11 @@ Gem::Specification.new do |gem|
   gem.files                 = %w(AUTHORS README.md UNLICENSE VERSION) + Dir.glob('lib/**/*.rb') + Dir.glob('etc/*')
   gem.require_paths         = %w(lib)
 
-  gem.required_ruby_version = '>= 2.4'
+  gem.required_ruby_version = '>= 2.6'
   gem.requirements          = []
-  gem.add_runtime_dependency     'rdf',             '~> 3.1', '>= 3.1.13'
-  gem.add_runtime_dependency     'rdf-rdfa',        '~> 3.1', '>= 3.1.3'
-  gem.add_runtime_dependency     'rdf-xsd',         '~> 3.1'
+  gem.add_runtime_dependency     'rdf',             '~> 3.2'
+  gem.add_runtime_dependency     'rdf-rdfa',        '~> 3.2'
+  gem.add_runtime_dependency     'rdf-xsd',         '~> 3.2'
   gem.add_runtime_dependency     'htmlentities',    '~> 4.3'
   gem.add_runtime_dependency     'nokogiri' ,       '~> 1.12'
 
@@ -31,10 +31,10 @@ Gem::Specification.new do |gem|
   gem.add_development_dependency 'rspec',           '~> 3.10'
   gem.add_development_dependency 'rspec-its',       '~> 1.3'
   
-  gem.add_development_dependency 'rdf-spec',        '~> 3.1'
-  gem.add_development_dependency 'rdf-turtle',      '~> 3.1'
-  gem.add_development_dependency 'rdf-isomorphic',  '~> 3.1'
-  gem.add_development_dependency 'json-ld',         '~> 3.1'
+  gem.add_development_dependency 'rdf-spec',        '~> 3.2'
+  gem.add_development_dependency 'rdf-turtle',      '~> 3.2'
+  gem.add_development_dependency 'rdf-isomorphic',  '~> 3.2'
+  gem.add_development_dependency 'json-ld',         '~> 3.2'
 
   gem.post_install_message  = nil
 end