diff --git a/rules/aws_cloudtrail_rules/aws_cloudtrail_password_policy_discovery.yml b/rules/aws_cloudtrail_rules/aws_cloudtrail_password_policy_discovery.yml
index fb2d91778..24d8e8bc6 100644
--- a/rules/aws_cloudtrail_rules/aws_cloudtrail_password_policy_discovery.yml
+++ b/rules/aws_cloudtrail_rules/aws_cloudtrail_password_policy_discovery.yml
@@ -6,6 +6,7 @@ Filename: aws_cloudtrail_password_policy_discovery.py
 Reports:
     MITRE ATT&CK:
         - TA0007:T1201
+Reference: https://docs.aws.amazon.com/IAM/latest/UserGuide/id_credentials_passwords_account-policy.html
 Severity: Info
 Tests:
     - ExpectedResult: false