Unable to create a self signed Certificate for SQL Server 2017(14.x.xxxx)

Using SQL Server 2017 Developer Edition The command I'm using is: >New-SelfSignedCertificate -CertStoreLocation Cert:\LocalMachine\My -DnsName host.doman.com -KeySpec KeyExchange -FriendlyName SQLCert The error message is: >New-SelfSignedCertificate : A parameter cannot be found that matches parameter name 'KeySpec'. My powerShell version is:

PS C:\Windows\system32> $PSversionTable

Name                           Value
----                           -----
PSVersion                      4.0
WSManStackVersion              3.0
SerializationVersion           1.1.0.1
CLRVersion                     4.0.30319.42000
BuildVersion                   6.3.9600.18773
PSCompatibleVersions           {1.0, 2.0, 3.0, 4.0}
PSRemotingProtocolVersion      2.2