diff --git a/ChangeLog.md b/ChangeLog.md
index 9779cd99..edd422c8 100644
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -1,6 +1,17 @@
 This is the master changelog for Elite Dangerous Market Connector.  Entries are in reverse chronological order (latest first).
 ---
 
+Release 4.0.1.0
+===
+This fixes a bug with the EDDB 'System Provider' URLs.
+
+ * It was possible to pick up, and use, a bad SystemAddress from the Frontier
+ CAPI.  The CAPI will no longer be used as a source for this.
+ * If we do not yet have a SystemAddress from the Journal we will use the
+ SystemName instead.  This carries the small risk of the player being in one
+ of the duplicate-name systems, in which case EDDB might not display the
+ correct system.
+ 
 Release 4.0.0.0
 ===
 Developers please note the new [Contributing.md](https://github.com/EDCD/EDMarketConnector/blob/main/Contributing.md)
diff --git a/config.py b/config.py
index d28e7ef5..7798e68c 100644
--- a/config.py
+++ b/config.py
@@ -8,7 +8,7 @@ from sys import platform
 appname = 'EDMarketConnector'
 applongname = 'E:D Market Connector'
 appcmdname = 'EDMC'
-appversion = '4.0.0.0'
+appversion = '4.0.1.0'
 copyright = u'© 2015-2019 Jonathan Harris, 2020 EDCD'
 
 update_feed = 'https://raw.githubusercontent.com/EDCD/EDMarketConnector/releases/edmarketconnector.xml'