Latch is too loose

Every time I wear this chain, it comes out of the latch and falls off. It has become really annoying, I was wondering if there is an easy way of fixing this, or should I just buy another one? Any advice is appreciated!

Every time I wear this chain, it comes out of the latch and falls off. It has become really annoying, I was wondering if there is an easy way of fixing this, or should I just buy another one? Any advice is appreciated!