How can I receive 5 star rating on my gig?

[rishabh2018]

I have total 58 reviews on my profile and 41 specific reviews on specific gig in which I got a 2.3 rating and rest are all 5 stars …but this affected the overall gig rating and it went down to 4.9 stars. I have to ask from you guys that how many more 5 star order do I need to maintain an overall 5 star rating??
Please help me. I’m very depressed after getting my first negative review!!