Does my husband have an alcohol problem??

So every night after work my husband will have 3-5 cans of beer and sometimes a glass of wine. He's never drunk or anything like that but I can't remember a time when he hasn't had a can in the evening. He was supposed to do 'dry July' but only made it one night without a beer! When I approach him about it he just dismisses it and gets defensive. Is it an issue? Or do I just leave it?