diff --git a/lib/metanorma/standoc/cleanup_maths.rb b/lib/metanorma/standoc/cleanup_maths.rb
index 637c0f30..dbf494f4 100644
--- a/lib/metanorma/standoc/cleanup_maths.rb
+++ b/lib/metanorma/standoc/cleanup_maths.rb
@@ -1,4 +1,3 @@
-require "asciimath2unitsml"
 require_relative "cleanup_mathvariant"
 
 module Metanorma
@@ -180,11 +179,11 @@ def mathml_number_format(stem)
       end
 
       def mathml_cleanup(xmldoc)
-        a2u = Asciimath2UnitsML::Conv.new(asciimath2unitsml_options)
+        #a2u = Asciimath2UnitsML::Conv.new(asciimath2unitsml_options)
         xmldoc.xpath("//stem[@type = 'MathML'][not(@validate = 'false')]")
           .each do |x|
           mathml_xml_cleanup(x)
-          a2u.MathML2UnitsML(x)
+          #a2u.MathML2UnitsML(x)
           mathml_mathvariant(x)
         end
         xmldoc.xpath("//stem[@type = 'MathML']")
diff --git a/lib/metanorma/standoc/validate_term.rb b/lib/metanorma/standoc/validate_term.rb
index 7d16087e..b14f52e7 100644
--- a/lib/metanorma/standoc/validate_term.rb
+++ b/lib/metanorma/standoc/validate_term.rb
@@ -1,3 +1,5 @@
+require "iev"
+
 module Metanorma
   module Standoc
     module Validate
@@ -7,7 +9,7 @@ module Validate
       def init_iev
         @no_isobib and return nil
         @iev and return @iev
-        @iev = Iev::Db.new(@iev_globalname, @iev_localname) unless @no_isobib
+        @iev = ::Iev::Db.new(@iev_globalname, @iev_localname) unless @no_isobib
         @iev
       end
 
diff --git a/metanorma-standoc.gemspec b/metanorma-standoc.gemspec
index 70cfd310..d6df2a35 100644
--- a/metanorma-standoc.gemspec
+++ b/metanorma-standoc.gemspec
@@ -40,7 +40,7 @@ Gem::Specification.new do |spec|
   spec.add_dependency "metanorma-utils", "~> 1.10.0"
   spec.add_dependency "ruby-jing"
   # relaton-cli not just relaton, to avoid circular reference in metanorma
-  spec.add_dependency "asciimath2unitsml", "~> 0.4.0"
+  #spec.add_dependency "asciimath2unitsml", "~> 0.4.0"
   spec.add_dependency "concurrent-ruby"
   spec.add_dependency "pngcheck"
   spec.add_dependency "relaton-cli", "~> 1.20.0"
diff --git a/spec/metanorma/cleanup_math_spec.rb b/spec/metanorma/cleanup_math_spec.rb
index 4cf7d149..c419d705 100644
--- a/spec/metanorma/cleanup_math_spec.rb
+++ b/spec/metanorma/cleanup_math_spec.rb
@@ -578,18 +578,7 @@
 
       stem:[1 "unitsml(cd)"]
 
-      [stem]
-      ++++
-      <math xmlns='http://www.w3.org/1998/Math/MathML'>
-        <mrow>
-        <mn>7</mn>
-        <mtext>unitsml(m*kg^-2)</mtext>
-        <mo>+</mo>
-        <mn>8</mn>
-        <mtext>unitsml(m*kg^-3)</mtext>
-        </mrow>
-      </math>
-      ++++
+      stem:[7 "unitsml(m*kg^-2)" + 8 "unitsml(m*kg^-3)"]
     INPUT
     output = <<~OUTPUT
       #{BLANK_HDR.sub('<metanorma-extension>', <<~EXT