Unnecessary White Space with BottomSheet

[cloudy-ninja]

I am using this picker with bottomsheet.
as you can see, it is showing unnecessary white space.
how can I remove this?

 showModalBottomSheet<void>(
    context: context,
    builder: (BuildContext context) {
      return EmojiPicker(
        rows: 3,
        columns: 7,
        recommendKeywords: ["racing", "horse"],
        numRecommended: 10,
        onEmojiSelected: (emoji, category) {
          print(emoji);
        },
      );
    },
  );