Sleeping through the

Do any of you ladies have any tips for me, I'm trying to get my 5 month old baby to sleep through the night but she still wakes up to feed. My sisters' baby is only 2 months older than my baby and he started sleeping through the night at around 3.5 months old. She does have a schedule set. I put her to bed everyday at 9 and she feeds before going to bed. Help me I'm very tired lol.šŸ˜“šŸ˜“