python问题处理

报 libpng warning: iCCP: known incorrect sRGB profile 错误，有谁知道怎么弄吗？

import pygame
pygame.init()
screen=pygame.display.set_mode((480,700))
bg=pygame.image.load('./images/background.png')
screen.blit(bg,(0,0))

hero=pygame.image.load('./images/me1.png')
screen.blit(hero,(150,300))
pygame.display.update()
clock=pygame.time.Clock()
hero_rect=pygame.Rect(150,300,102,126)

while True:
clock.tick(60)
for event in pygame.event.get():
if event.type==pygame.QUIT:
print('游戏退出')
pygame.quit()
exit()

hero_rect.y-=1
if hero_rect.y<=0:
    hero_rect.y=700
screen.blit(bg,(0,0))
screen.blit(hero,hero_rect)
pygame.display.update()

pygame.quit()