diff --git a/dns/ec2-detection.yaml b/dns/ec2-detection.yaml
index cc95bc1353..c43aa37c25 100644
--- a/dns/ec2-detection.yaml
+++ b/dns/ec2-detection.yaml
@@ -6,7 +6,8 @@ info:
   severity: info
   description: Amazon Elastic Compute Cloud (EC2) detected.
   reference:
-    - https://blog.melbadry9.xyz/dangling-dns/aws/ddns-ec2-current-state
+    - https://aws.amazon.com/ec2/
+    - https://infosecwriteups.com/dangling-dns-aws-ec2-e2d801701e8
   classification:
     cwe-id: CWE-200
   metadata: