diff --git a/Frontend/tools/xsd.html b/Frontend/tools/xsd.html
index 8bd8209..4cfbd35 100644
--- a/Frontend/tools/xsd.html
+++ b/Frontend/tools/xsd.html
@@ -23,6 +23,12 @@
                             <option value="xalan">Xalan</option>
                             <option value="libxml">libXML</option>
                         </select>
+                        <select name="versions" id="versions" style="display: none;">
+                            <option class="hideable libxml xalan"value="1.0">1.0</option>
+                            <option class="hideable saxon" value="2.0">2.0</option>
+                            <option class="hideable saxon" value="3.0">3.0</option>
+                            <option class="hideable saxon" value="3.1">3.1</option>
+                        </select>
                     </div>
                     <div>
                         <button class="action-button active" id="clearXMLButton" style="padding: 3px 10px;"