diff --git a/lib/unitsml.rb b/lib/unitsml.rb
index a1622ca..0a9c395 100644
--- a/lib/unitsml.rb
+++ b/lib/unitsml.rb
@@ -32,7 +32,3 @@ def parse(string)
     Unitsml::Parser.new(string).parse
   end
 end
-
-Lutaml::Model::Config.configure do |config|
-  config.xml_adapter_type = RUBY_ENGINE == "opal" ? :oga : :ox
-end
diff --git a/unitsml.gemspec b/unitsml.gemspec
index 10d2f34..6bd97f3 100644
--- a/unitsml.gemspec
+++ b/unitsml.gemspec
@@ -33,6 +33,7 @@ Gem::Specification.new do |spec|
   spec.require_paths = ["lib"]
 
   spec.add_dependency "htmlentities"
+  spec.add_dependency "ox"
   spec.add_dependency "lutaml-model", "~> 0.8.0"
   spec.add_dependency "mml", "~> 2.3.6"
   spec.add_dependency "parslet"