diff --git a/lib/asciidoctor/iso/isodoc.rng b/lib/asciidoctor/iso/isodoc.rng
index ee94d9a3..9359e9ed 100644
--- a/lib/asciidoctor/iso/isodoc.rng
+++ b/lib/asciidoctor/iso/isodoc.rng
@@ -572,6 +572,9 @@
       <attribute name="id">
         <data type="ID"/>
       </attribute>
+      <optional>
+        <attribute name="alt"/>
+      </optional>
       <optional>
         <ref name="tname"/>
       </optional>
@@ -907,6 +910,9 @@
       <attribute name="type">
         <ref name="ReferenceFormat"/>
       </attribute>
+      <optional>
+        <attribute name="alt"/>
+      </optional>
       <text/>
     </element>
   </define>
diff --git a/lib/metanorma/iso/version.rb b/lib/metanorma/iso/version.rb
index 21edbe35..521d30b5 100644
--- a/lib/metanorma/iso/version.rb
+++ b/lib/metanorma/iso/version.rb
@@ -1,5 +1,5 @@
 module Metanorma
   module ISO
-    VERSION = "1.1.5".freeze
+    VERSION = "1.1.6".freeze
   end
 end
diff --git a/spec/assets/iso.doc b/spec/assets/iso.doc
index 24601adf..2e285bb7 100644
--- a/spec/assets/iso.doc
+++ b/spec/assets/iso.doc
@@ -1,7 +1,7 @@
 MIME-Version: 1.0
-Content-Type: multipart/related; boundary="----=_NextPart_8e2f020a.9f3b.4c1d"
+Content-Type: multipart/related; boundary="----=_NextPart_e4a5349e.4f58.493a"
 
-------=_NextPart_8e2f020a.9f3b.4c1d
+------=_NextPart_e4a5349e.4f58.493a
 Content-Location: file:///C:/Doc/iso.htm
 Content-Type: text/html; charset="utf-8"
 
@@ -891,11 +891,11 @@ Switzerland<p class="MsoNormal"></p></span></p>
 <p class="MsoToc1"><span lang="EN-GB" xml:lang="EN-GB"><span style="mso-element:field-begin"></span><span style="mso-spacerun:yes">&#xA0;</span>TOC
   \o "1-2" \h \z \u <span style="mso-element:field-separator"></span></span>
 <span class="MsoHyperlink"><span lang="EN-GB" style="mso-no-proof:yes" xml:lang="EN-GB">
-<a href="#_Toc798958466">Foreword<span lang="EN-GB" class="MsoTocTextSpan" xml:lang="EN-GB">
+<a href="#_Toc960707792">Foreword<span lang="EN-GB" class="MsoTocTextSpan" xml:lang="EN-GB">
 <span style="mso-tab-count:1 dotted">. </span>
 </span><span lang="EN-GB" class="MsoTocTextSpan" xml:lang="EN-GB">
 <span style="mso-element:field-begin"></span></span>
-<span lang="EN-GB" class="MsoTocTextSpan" xml:lang="EN-GB"> PAGEREF _Toc798958466 \h </span>
+<span lang="EN-GB" class="MsoTocTextSpan" xml:lang="EN-GB"> PAGEREF _Toc960707792 \h </span>
   <span lang="EN-GB" class="MsoTocTextSpan" xml:lang="EN-GB"><span style="mso-element:field-separator"></span></span><span lang="EN-GB" class="MsoTocTextSpan" xml:lang="EN-GB">1</span>
   <span lang="EN-GB" class="MsoTocTextSpan" xml:lang="EN-GB"></span><span lang="EN-GB" class="MsoTocTextSpan" xml:lang="EN-GB"><span style="mso-element:field-end"></span></span></a></span></span></p>
 
@@ -932,7 +932,7 @@ Switzerland<p class="MsoNormal"></p></span></p>
 </html>
 
 
-------=_NextPart_8e2f020a.9f3b.4c1d
+------=_NextPart_e4a5349e.4f58.493a
 Content-Location: file:///C:/Doc/iso_files/filelist.xml
 Content-Transfer-Encoding: base64
 Content-Type: application/xml
@@ -942,7 +942,7 @@ ICAgICAgIDxvOk1haW5GaWxlIEhSZWY9Ii4uL3NwZWMvYXNzZXRzL2lzby5odG0iLz4gIDxvOkZp
 bGUgSFJlZj0iZmlsZWxpc3QueG1sIi8+CiAgPG86RmlsZSBIUmVmPSJoZWFkZXIuaHRtbCIvPgo8
 L3htbD4K
 
-------=_NextPart_8e2f020a.9f3b.4c1d
+------=_NextPart_e4a5349e.4f58.493a
 Content-Location: file:///C:/Doc/iso_files/header.html
 Content-Transfer-Encoding: base64
 Content-Type: text/html charset="utf-8"
@@ -1135,4 +1135,4 @@ cD4NCg0KPHAgY2xhc3M9TXNvRm9vdGVyPjxzcGFuIGxhbmc9RU4tQVUgc3R5bGU9J2ZvbnQtc2l6
 ZToxMC4wcHQ7Jz7CqQ0KJm5ic3A7Jm5ic3A74oCTIEFsbCByaWdodHMgcmVzZXJ2ZWQ8bzpwPjwv
 bzpwPjwvc3Bhbj48L3A+DQoNCjwvZGl2Pg0KDQoNCg0KPC9ib2R5Pg0KDQo8L2h0bWw+DQo=
 
-------=_NextPart_8e2f020a.9f3b.4c1d--
\ No newline at end of file
+------=_NextPart_e4a5349e.4f58.493a--
\ No newline at end of file
diff --git a/spec/isodoc/postproc_spec.rb b/spec/isodoc/postproc_spec.rb
index 28e8cda1..5bf78e8a 100644
--- a/spec/isodoc/postproc_spec.rb
+++ b/spec/isodoc/postproc_spec.rb
@@ -485,7 +485,7 @@
          <p class="MsoNormal">Hello</p>
          <p class="MsoNormal">Key</p>
          <p class="MsoNormal"><b>Key</b></p><div class="figdl"><table class="figdl"><tr><td valign="top" align="left"><p align="left" style="margin-left:0pt;text-align:left;" class="MsoNormal"><p class="MsoNormal">A</p></p></td><td valign="top"><p class="MsoNormal">B</p></td></tr></table></div>
-       </div>
+         <p class="FigureTitle" align="center">Figure A.1</p></div>
              </div>
            </div>
            <br clear="all" style="page-break-before:left;mso-break-type:section-break"/>