Node.js - PostgreSQL - could not determine data type of parameter $1 error

I'm trying to create a PostgreSQL prepared statement using node.js pg npm package. However, I keep getting an error:

could not determine data type of parameter $1

 function promiseQuery(sql, values) {
    return new Promise(function(resolve, reject) {
        pool.query('select $1 from workers', ['name'], function(err, result) {
            if (err) {console.log(err); reject(err)}
            else resolve(result.rows);   
        })
    });
}

In the db the name field is set to type text not null.

I also tries pg-promise, but with no success either.