How to subscribe to DB changes with Floor in Flutter?

Question

I'm trying to use an ability of Floor package to subscribe to db changes getting a stream like that:

  @Query(
      'SELECT * from word INNER JOIN word_category_join ON word.id=word_category_join.word_id '
      'WHERE word_category_join.category_id=:categoryId')
  Stream<List<Word>> getWordsForCategoryAsStream(int categoryId);

And using it in a StreamBuilder in my views.

And according to the documentation, my stream should return a new snapshot every time the Word table changed, but it doesn't. What am I doing wrong?