diff --git a/Gemfile b/Gemfile
index e92ae304..ca9a32c5 100644
--- a/Gemfile
+++ b/Gemfile
@@ -8,3 +8,4 @@ gemspec
 
 eval_gemfile("Gemfile.devel") rescue nil
 
+gem "metanorma-plugin-lutaml", github: "metanorma/metanorma-plugin-lutaml", branch: "feature/unitsml_liquid_filters"
diff --git a/lib/metanorma/converter/converter.rb b/lib/metanorma/converter/converter.rb
index d29f21f8..5c7494c2 100644
--- a/lib/metanorma/converter/converter.rb
+++ b/lib/metanorma/converter/converter.rb
@@ -23,6 +23,7 @@ module Standoc
     class Converter
       Asciidoctor::Extensions.register do
         preprocessor Metanorma::Standoc::ResolveIncludePreprocessor
+        preprocessor Metanorma::Plugin::Lutaml::LutamlXsdPreprocessor
         preprocessor Metanorma::Plugin::Lutaml::LutamlPreprocessor
         preprocessor Metanorma::Plugin::Lutaml::LutamlUmlDatamodelDescriptionPreprocessor
         preprocessor Metanorma::Plugin::Lutaml::LutamlEaXmiPreprocessor