register_post_type() accepts a parameter capabilities in its arguments. See get_post_type_capabilities() for possible values.
you can add these settings in your code while registering the custom post type
'capabilities' => array(
'edit_post' => 'update_core',
'read_post' => 'update_core',
'delete_post' => 'update_core',
'edit_posts' => 'update_core',
'edit_others_posts' => 'update_core',
'delete_posts' => 'update_core',
'publish_posts' => 'update_core',
'read_private_posts' => 'update_core'
),