How to put additional files into auto-py-to-exe --onefile mode?

Question

Im using auto-py-to-exe with img = tkinter.Image("photo", file = "./square.png"). (i did import tkinter) It works by running it through the .py file but after i convert it in --onefile mode using auto-py-to-exe it just says that the file is non-existant. Strangely if I copy/paste a square.png beside the .exe file it works using that image.

Here's the full code.

import turtle
import tkinter
import time
import random

s = turtle.Screen()
t = turtle.Turtle()
turtle.title("Pixel")
img = tkinter.Image("photo", file = "./square.png")
turtle._Screen._root.iconphoto(True, img)

#[turtle drawing stuff below.]