diff --git a/README.md b/README.md
index c48ec8f..864a534 100644
--- a/README.md
+++ b/README.md
@@ -45,6 +45,7 @@ Whichever method you use to authenticate, the AWS account you use to authenticat
             "Sid": "Stmt1433747550000",
             "Effect": "Allow",
             "Action": [
+                "cloudwatch:PutMetricData",
                 "ec2:CreateImage",
                 "ec2:CreateTags",
                 "ec2:DeleteSnapshot",