报错(root) Additional property redis is not allowed

Error when doing docker-compose

(root) Additional property redis is not allowed
Be sure to check the .yuml file
Mine is that the yuml file is not aligned

version: "3.9"
services:
  web:
    build: .
    ports:
      - "8000:5000"
  redis:
    image: "redis:alpine"

Just align