ports problem!

ports problem!
I update ports,but can't install apache2:
To enable a module category: WITH_<CATEGORY>_MODULES
To disable a module category: WITHOUT_<CATEGORY>_MODULES

Per default categories are:
  AUTH DAV MISC SLAVE_PORT
Categories available:
  AUTH DAV EXPERIMENTAL LDAP MISC PROXY SSL SUEXEC THREADS

  To see all available knobs, type make show-options
  You can check your modules configuration by using show-modules

Dependency warning: used OpenSSL version contains known vulnerabilities
Please update or define either WITH_OPENSSL_BASE or WITH_OPENSSL_PORT
*** Error code 1

Stop in /usr/ports/www/apache2.

how should I do?thank you!
(previously,I install apache use pkg_add apache2,then pkg_delete)