diff --git a/aws/README.md b/aws/README.md
index d8c7ce0..024e83c 100644
--- a/aws/README.md
+++ b/aws/README.md
@@ -55,7 +55,7 @@ List of default usernames:
 | --- | --- |
 | Ubuntu |  `ubuntu` |
 | Debian | `admin` |
-| CentOS | `centos` |
+| CentOS (`CentOS Linux 7`) | `centos` |
 | Amazon Linux 2 | `ec2-user` |
 
 This template generates a key pair for you during deployment, and the private key will be available as text under the **Outputs** tab after the stack is successfully created.
diff --git a/aws/cloudformation-template-ipsec.json b/aws/cloudformation-template-ipsec.json
index 28eef4b..613b405 100644
--- a/aws/cloudformation-template-ipsec.json
+++ b/aws/cloudformation-template-ipsec.json
@@ -374,7 +374,7 @@
                                 "           'Debian10': 'debian-10-amd64-*',",
                                 "           'Debian11': 'debian-11-amd64-*',",
                                 "           'Debian12': 'debian-12-amd64-*',",
-                                "           'CentOS7': 'CentOS 7.9.2009 x86_64',",
+                                "           'CentOS7': 'CentOS Linux 7 x86_64 - *',",
                                 "           'AmazonLinux2': 'amzn2-ami-hvm-*.*-x86_64-gp2',",
                                 "       }[distribution]",
                                 "       response = ec2.describe_images(Filters=[{'Name':'name', 'Values':[AMIName]}], Owners=['099720109477', '136693071363', '125523088429', 'amazon'])",