How to change metatags from Elgg 1.7 to Elgg 1.9?

Usually we are using metatags in Elgg 1.7. But these are deprecated in Elgg 1.9. Facing a problem while upgrading the site from Elgg 1.7 to Elgg 1.9. Not getting any idea of what to use in Elgg 1.9 site for those metatag functions. Can any one help me resolve the issue.