diff --git a/.idea/inspectionProfiles/Project_Default.xml b/.idea/inspectionProfiles/Project_Default.xml
index 876cfb3..b4c3b8f 100644
--- a/.idea/inspectionProfiles/Project_Default.xml
+++ b/.idea/inspectionProfiles/Project_Default.xml
@@ -4,10 +4,11 @@
     <inspection_tool class="PyCompatibilityInspection" enabled="true" level="ERROR" enabled_by_default="true">
       <option name="ourVersions">
         <value>
-          <list size="3">
+          <list size="4">
             <item index="0" class="java.lang.String" itemvalue="3.6" />
             <item index="1" class="java.lang.String" itemvalue="3.7" />
             <item index="2" class="java.lang.String" itemvalue="3.8" />
+            <item index="3" class="java.lang.String" itemvalue="3.9" />
           </list>
         </value>
       </option>
diff --git a/.idea/misc.xml b/.idea/misc.xml
index 17c1b54..6d0cf62 100644
--- a/.idea/misc.xml
+++ b/.idea/misc.xml
@@ -4,4 +4,7 @@
     <option name="languageLevel" value="ES6" />
   </component>
   <component name="ProjectRootManager" version="2" project-jdk-name="Python 3.8 (webhook-matrix-notifier)" project-jdk-type="Python SDK" />
+  <component name="PythonCompatibilityInspectionAdvertiser">
+    <option name="version" value="3" />
+  </component>
 </project>
\ No newline at end of file
diff --git a/.idea/webhook-matrix-notifier.iml b/.idea/webhook-matrix-notifier.iml
index a09991b..74d515a 100644
--- a/.idea/webhook-matrix-notifier.iml
+++ b/.idea/webhook-matrix-notifier.iml
@@ -4,7 +4,7 @@
     <content url="file://$MODULE_DIR$">
       <excludeFolder url="file://$MODULE_DIR$/venv" />
     </content>
-    <orderEntry type="jdk" jdkName="Python 3.8 (webhook-matrix-notifier)" jdkType="Python SDK" />
+    <orderEntry type="inheritedJdk" />
     <orderEntry type="sourceFolder" forTests="false" />
   </component>
 </module>
\ No newline at end of file
diff --git a/wmn.py b/wmn.py
index 7f7dae3..158943d 100644
--- a/wmn.py
+++ b/wmn.py
@@ -150,22 +150,31 @@ def process_jenkins_request():
                     f"  <li>{shorten(change_message)} {commit_link} by {change['author']} at {htimestamp}</li>",
                 )
             else:
-                return shorten(json.dumps(change).replace("<", "&"), appendix="...}")
+                dump = shorten(json.dumps(change), appendix="...}")
+                return (
+                    dump,
+                    dump.replace("<", "&lt;").replace(">", "&gt;")
+                )
 
         build_name = request.json["displayName"]
         project_name = request.json["project"]["fullDisplayName"]
         result_type = request.json["result"]["type"]
         result_color = request.json["result"]["color"]
-        text_change_messages, html_change_messages = zip(*map(extract_change_message, request.json['changes']))
+        changes = request.json['changes']
+        if len(changes) > 0:
+            text_change_messages, html_change_messages = zip(*map(extract_change_message, changes))
+        else:
+            text_change_messages, html_change_messages = (), ()  # it's an owl!
+
         newline = '\n'
         try:
             room.send_html(f"<p><strong>Build {build_name} on project {project_name} complete: "
                            f"<font color=\"{result_color}\">{result_type}</font></strong>, "
-                           f"{len(request.json['changes'])} commits</p>\n"
-                           "" + (f"<ul>\n{newline.join(html_change_messages)}\n</ul>\n" if len(request.json['changes']) > 0 else ""),
+                           f"{len(changes)} commits</p>\n"
+                           "" + (f"<ul>\n{newline.join(html_change_messages)}\n</ul>\n" if len(html_change_messages) > 0 else ""),
                            body=f"**Build {build_name} on project {project_name} complete: {result_type}**, "
-                                f"{len(request.json['changes'])} commits\n"
-                                "" + (f"{newline.join(text_change_messages)}\n" if len(request.json['changes']) > 0 else ""),
+                                f"{len(changes)} commits\n"
+                                "" + (f"{newline.join(text_change_messages)}\n" if len(text_change_messages) > 0 else ""),
                            msgtype=msgtype)
         except MatrixRequestError as e:
             return matrix_error(e)