diff --git a/lib/metanorma/itu/converter.rb b/lib/metanorma/itu/converter.rb
index 8e2d0a64..b089d059 100644
--- a/lib/metanorma/itu/converter.rb
+++ b/lib/metanorma/itu/converter.rb
@@ -47,7 +47,7 @@ def olist(node)
             list_caption(node, xml_ol)
             node.items.each { |item| li(xml_ol, item) }
           end
-        end.join("\n")
+        end.join("")
       end
 
       def outputs(node, ret)
diff --git a/lib/metanorma/itu/isodoc.rng b/lib/metanorma/itu/isodoc.rng
index 91a3f287..e630480b 100644
--- a/lib/metanorma/itu/isodoc.rng
+++ b/lib/metanorma/itu/isodoc.rng
@@ -17,7 +17,7 @@
   these elements; we just want one namespace for any child grammars
   of this.
 -->
-<!-- VERSION v1.3.2 -->
+<!-- VERSION v1.3.3 -->
 <grammar xmlns:a="http://relaxng.org/ns/compatibility/annotations/1.0" xmlns="http://relaxng.org/ns/structure/1.0" datatypeLibrary="http://www.w3.org/2001/XMLSchema-datatypes">
   <include href="reqt.rng"/>
   <include href="basicdoc.rng">
@@ -331,9 +331,9 @@
       <zeroOrMore>
         <ref name="table-note"/>
       </zeroOrMore>
-      <optional>
+      <zeroOrMore>
         <ref name="source"/>
-      </optional>
+      </zeroOrMore>
     </define>
     <define name="FigureAttr">
       <optional>
@@ -380,9 +380,9 @@
       <zeroOrMore>
         <ref name="note"/>
       </zeroOrMore>
-      <optional>
+      <zeroOrMore>
         <ref name="source"/>
-      </optional>
+      </zeroOrMore>
     </define>
     <define name="source">
       <element name="source">
diff --git a/lib/metanorma/itu/version.rb b/lib/metanorma/itu/version.rb
index 46d7a9a5..c1e55bfc 100644
--- a/lib/metanorma/itu/version.rb
+++ b/lib/metanorma/itu/version.rb
@@ -1,5 +1,5 @@
 module Metanorma
   module ITU
-    VERSION = "2.4.11".freeze
+    VERSION = "2.4.12".freeze
   end
 end