Flutter Modal bottom sheet will overlap keyboard

custom.dart

import 'package:flutter/material.dart';

class CustomPage extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Container(),
      floatingActionButton: FloatingActionButton(
        onPressed: () {
          showModalBottomSheet(
            context: context,
            builder: (context) {
              // Does not work
              return Scaffold(
                body:
                  Column(
                    mainAxisSize: MainAxisSize.min,
                    children: <Widget>[
                      TextField(
                        decoration: InputDecoration(labelText: "1"),
                      ),
                      TextField(
                        decoration: InputDecoration(labelText: "2"),
                      ),
                      TextField(
                        decoration: InputDecoration(labelText: "3"),
                      )
                    ],
                  )
              );
            },
          );
        },
      ),
    );
  }
}

void main() {
  runApp(MaterialApp(home: CustomPage()));
}