Since Django 1.11 (current version 3.0), there's a new way of adding indexes to django tables, Meta.indexes (https://docs.djangoproject.com/en/3.0/ref/models/options/#django.db.models.Options.indexes). This package doesn't work with these, it only works with db_index on fields themselves and the Meta.index_together option (which currently has a warning in the docs that Meta.indexes should be used instead).