Try adding all of the following: define(‘FS_METHOD’, ‘ftpext’); define(‘FTP_BASE’, ‘/path/to/wordpress/’); define(‘FTP_CONTENT_DIR’, ‘/path/to/wordpress/wp-content/’); define(‘FTP_PLUGIN_DIR ‘, ‘/path/to/wordpress/wp-content/plugins/’); #define(‘FTP_PUBKEY’, ‘/home/username/.ssh/id_rsa.pub’); #define(‘FTP_PRIKEY’, ‘/home/username/.ssh/id_rsa’); define(‘FTP_USER’, ‘username’); define(‘FTP_PASS’, ‘password’); define(‘FTP_HOST’, ‘ftp.example.org’); define(‘FTP_SSL’, false); This is sourced from the official wp-config document here.