diff --git a/CHANGES_NEXT_RELEASE b/CHANGES_NEXT_RELEASE
index c8b33c641..1bd99add8 100644
--- a/CHANGES_NEXT_RELEASE
+++ b/CHANGES_NEXT_RELEASE
@@ -14,3 +14,4 @@
 - Fix: null values arithmetics in JEXL expressions (#1440)
 - Fix: remove mongo `DeprecationWarning: current Server Discovery and Monitoring engine is deprecated` by setting `useUnifiedTopology = true`
 - Upgrade mongodb dev dep from 4.17.0 to 4.17.1
+- Fix: mongodb.authSource / IOTA_MONGO_AUTH_SOURCE was not correctly supported (#1526)