diff --git a/ChangeLog.md b/ChangeLog.md
index eb75a48f..92083dcf 100644
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -4,6 +4,7 @@ This is the master changelog for Elite Dangerous Market Connector.  Entries are
 Release 4.0.4
 ===
 
+ * Built using Python 3.7.8.  Prior 4.0.x releases used 3.7.7.
  * Don't crash if no non-default Journal Directory has been set.
  * Only send to Inara API at most once every 30 seconds.  This should avoid
  the "Inara 400 Too much requests, slow down, cowboy. ;) ..." message and
diff --git a/edmarketconnector.xml b/edmarketconnector.xml
index 41b5dcd4..9854da44 100644
--- a/edmarketconnector.xml
+++ b/edmarketconnector.xml
@@ -176,6 +176,9 @@
 <h2>Release 4.0.4</h2>
 <ul>
 <li>
+<p>Built using Python 3.7.8.  Prior 4.0.x releases used 3.7.7.</p>
+</li>
+<li>
 <p>Don't crash if no non-default Journal Directory has been set.</p>
 </li>
 <li>