debsig-verify failing post upgrade of Ubuntu OS to 18.04

[veeruself]

I have upgraded Ubuntu OS to 18.04, then debsig-veify is not working and saying below error , when I run with debug mode.

root@VRM-VNEx5:/tmp# debsig-verify -v -d vne-upgrade.Ji1Xd8EcMj
debsig: Starting verification for: vne-upgrade.Ji1Xd8EcMj
debsig: getSigKeyID: got 77D769012BE9A47B for origin key
debsig: Using policy directory: /etc/debsig/policies/77D769012BE9A47B
debsig: Parsing policy file: /etc/debsig/policies/77D769012BE9A47B/vne-updates.pol
debsig: parsePolicyFile: parsing '/etc/debsig/policies/77D769012BE9A47B/vne-updates.pol'
debsig: 3: policy name space != https://www.debian.org/debsig/1.0/
debsig: parsePolicyFile: completed
debsig: parsePolicyFile: 1 errors during parsing, failed
debsig: No applicable policy found.

if I remove the xmlns from the policy file (i.e *.pol) then it is started working.