@Umi if you're on a shared hosting plan I don't think you can change that. If you're in a VPS or dedicated server, yes you can.
However, there's a workaround to that.
You can either, split the files into multiple sql files and import them sequentially.
You can also compress the sql file so the uploaded file is less than 50 MB.
Hope it helps!
And if I solved your issue, mark it as solution 😄