How to cope the small flying insects living on the compost of my new indoor plant?

I am very interested in planting and as I don't own a yard and a small garden, I am doing some indoors. To fill the vases and grow the seeds (sowing) it is necessary to use compost. But unfortunately, from the time I have filled the vases, the number of tiny, black, very weak, flying insects in my flat has increased. I found out that they live on the fresh compost. I am not happy with them and they are increasing day by day. Can anyone give me a favour and tell me how I can overcome this problem? Thanks.