webhook SSL cert verification issue

Hi Team, Thanks for the support we recently upgraded our gitlab from 8.17.4 to 8.17.7 version. post this all our webhooks configured to connect to jenkins commits and working before are throwing error as "Hook execution failed:SSL_connect returned=1 errno=0 state=error: certificate verify failed". Could you please let us know if this is bug in this version of gitlab.

Thanks & Regards Rajalakshmi H M