Ionic 2 Publishing Issue

I seem to be having trouble publishing in Ionic2. When running the jarsigner tool after creating a new key store just like in the instructions I keep getting the following error. Has anyone scene these before or know what to do?

No -tsa or -tsacert is provided and this jar is not timestamped. Without a timestamp, users may not be able to validate this jar after the signer certificate's expiration date (2044-06-13) or after any future revocation date.