diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3527b48ca..5ef27e160 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -32,6 +32,7 @@ IMPROVEMENTS:
   * provider/aws: Add S3 support for Lambda Function resource [GH-3794]
   * provider/aws: Add `name_prefix` option to launch configurations [GH-3802]
   * provider/aws: Add snapshot window and retention limits for ElastiCache (Redis) [GH-3707]
+  * provider/aws: `engine_version` is now optional for DB Instance [GH-3744]
   * provider/aws: Add configuration to enable copying RDS tags to final snapshot [GH-3529]
   * provider/aws: RDS Cluster additions (`backup_retention_period`, `preferred_backup_window`, `preferred_maintenance_window`) [GH-3757]
   * provider/openstack: Use IPv4 as the defeault IP version for subnets [GH-3091]