yes you're, it doesn't matter how much is your employees salary, you need to register if:
Under Section 2(12) the Act is applicable to non-seasonal factories employing 10 or more persons.
Under Section 1(5) of the Act, the Scheme has been extended to shops, hotels, restaurants, cinemas including preview theatres, road-motor transport undertakings and newspaper establishments employing 20* or more persons.
Further under section 1(5) of the Act, the Scheme has been extended to Private Medical and Educational institutions employing 20* or more persons in certain States/UTs.
Please read further for all frequently asked questions about ESI:
https://biblehr.com/esic-frequently-asked-questions/
on a side note: ESI new wage limit of Rs 21000/- is under consultation, you need to wait till the final approval.