As @Pieter Goosen said, you shouldn’t be using query_posts
, nor running your own query. Instead, override the main query that already runs:
function wpse_144974_pre_get_posts( $wp_query ) {
if ( ! is_admin() && $wp_query->is_main_query() && is_home() )
$wp_query->set( 'cat', 1 );
}
add_action( 'pre_get_posts', 'wpse_144974_pre_get_posts' );