Miracle Potting Soil has worms

Imagine my surprise. To be fair I bought the Miracle Potting Soil for Fruits and Vegetables. Probably not the smartest thing I did but I used it to my houseplants which is why I know. I completely cleaned my Peace Lilly of most of the dirt and put it in a pot. As I started to change my potting soil today I noticed them. I was a bit alarmed... If it was in a garden I might be happy but not when it's a houseplant where they are not necessary.