How to get my dog to stop chasing and barking at my cat ?

I got a puppy almost a year ago and they've mostly not been in the same spaces as my cat but when they were the dog would bark and scare the cat away and this has increased lately. My cat is not confident around the dog and will run and refuse to come into the house or will stay upstairs where the dog can't... show more I got a puppy almost a year ago and they've mostly not been in the same spaces as my cat but when they were the dog would bark and scare the cat away and this has increased lately. My cat is not confident around the dog and will run and refuse to come into the house or will stay upstairs where the dog can't go and I'm worried the cat will leave and not return. Please help, I don't want to lose my cat over this.
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