AWS SSL Cert Upload - Not Authorized to perform iam:UploadServerCertificate

I am trying to upload my SSL credentials to my AWS server using the following command:

    aws iam upload-server-certificate --server-certificate-name cert_name --
certificate-body file://Desktop/************.pem --private-key 
file://Desktop/**************.pem --certificate-chain file://Desktop/************

However, when running this, I get the following error:

    A client error (AccessDenied) occurred when calling the 
UploadServerCertificate operation: User: arn:aws:iam::**********:user/************ 
is not authorized to perform: iam:UploadServerCertificate on resource: 
arn:aws:iam::************:server-certificate/***************

Is there some permission I need to change for the IAM user I am connected with? I am not able to see where I'd even do this. Thank you for your help.