When using gulp 4

[sp90]

In there i have critical to run over all my html files and optimize my css files.

But i just swapped to gulp 4, and it now throws this err

The following tasks did not complete: deploy, html--deploy
Did you forget to signal async completion?

var critical = require('critical').stream;

gulp.task('html--deploy', function() {
    return gulp.src(config.html)
        .pipe(critical({base: 'dist/', inline: true, css: ['dist/css/app.css']}))
        .pipe(gulp.dest('dist'));
});

Could it be the ('critical').stream?

[sp90]

Wasn't critical sorry