Framework: Fehler beim Ändern des Spaltentyps in json

Ich bin mir nicht sicher, ob es sich um einen Fehler handelt, aber das Ändern eines Spaltentyps von varchar in json führt zu folgendem Fehler:

Schema::table('fields', function (Blueprint $table) {
    $table->json('label')->change();
});

  [Doctrine\DBAL\DBALException]
  Unknown column type "json" requested. Any Doctrine type that you use has to be registered
  with \Doctrine\DBAL\Types\Type::addType(). You can get a list of all the known types with
  \Doctrine\DBAL\Types\Type::getTypesMap(). If this error occurs during database introspecti
  on then you might have forgot to register all database types for a Doctrine Type. Use Abst
  ractPlatform#registerDoctrineTypeMapping() or have your custom types implement Type#getMap
  pedDatabaseTypes(). If the type name is empty you might have a problem with the cache or f
  orgot some mapping information.

Verwenden Sie stattdessen $table->text('label')->change(); ?