Is your logo getting a bit tired, or maybe you were never really happy with it?
There are so many sites now where you can get AI to design you a logo for a fraction of the price a marketing agency would.
Here is one I have used.
Remember that if you change your logo you will lose your brand recognition, which may not be a big deal if you are a new business, but if you have been trading for years, try and keep some of the heritage look in your new logo. This can be done by keeping a similar shape and the same colours.