can someone fix the mouth? -MOS

Description: ~MOS SANS~- made by ~DST~ for ~MOS~ ~Sans~- atk- 580 def-0, a hard enemy,but not enough stamina

CREATOR ID:	450a4c
VIEWS:	173
AGE:	3 years old
BASED ON:	https://images-wixmp-ed30a86b8c4ca887773594c2.wixmp.com/f/ace80097-21be-4258-857d-18fda0419a51/de33cms-05dc5829-c6a7-4add-a8a7-a8c6820b426f.png/v1/fill/w_200,h_200,strp/outertale_sans_sprite___fanmade_by_mrmitten_de33cms-fullview.png?token=eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJzdWIiOiJ1cm46YXBwOiIsImlzcyI6InVybjphcHA6Iiwib2JqIjpbW3siaGVpZ2h0IjoiPD0yMDAiLCJwYXRoIjoiXC9mXC9hY2U4MDA5Ny0yMWJlLTQyNTgtODU3ZC0xOGZkYTA0MTlhNTFcL2RlMzNjbXMtMDVkYzU4MjktYzZhNy00YWRkLWE4YTctYThjNjgyMGI0MjZmLnBuZyIsIndpZHRoIjoiPD0yMDAifV1dLCJhdWQiOlsidXJuOnNlcnZpY2U6aW1hZ2Uub3BlcmF0aW9ucyJdfQ.WjV50J_3RzeEa2ygRYcAjt3hhhk_31bqfz6nNemPTAg-MOS