Object Storage Bucket Single IP Access

Hello, I am using the following policy to try to allow access to only two ip addresses to my Linode Object Store Bucket but when I apply this policy, the ip addresses I am trying to allow are still denied and I get locked out from the bucket. Does anyone have any ideas as to why that might be so?

{
"Version": "2012-10-17",
"Id": "S3PolicyId1",
"Statement": [
{
"Sid": "IPAllow",
"Effect": "Deny",
"Principal": "", "Action": "s3:",
"Resource": [
"arn:aws:s3:::test12345678901",
"arn:aws:s3:::test12345678901/*"
],
"Condition": {
"NotIpAddress": {
"aws:SourceIp": "177.81.143.74/32",
"aws:SourceIp": "175.83.141.76/32"
}
}
}
]
}

Thanks