Unraveling on cast on stitch

Hi! I just need a quick help. I finished a beanie a few days ago. After a few times of wearing it, the cast on stitch is unraveling. I must have messed up when finishing it off. Is there any way to fix this? Thanks

Welcome!

Did you make the beannie bottom up (cast on is around your face) and did you leave about a 4-6" tail to weave in?
Can you post a photo of what the unraveling looks like?