I use this kind of strap locks on all my guitars. I have two comfortable and well padded guitar straps which I can use interchangeably between all my guitars.
This is a very secure and effective locking solution, used by other brands too. It's so secure, that if you manage to drop your guitar, you probably have a malfunctioning guitar strap...
The straps locks are very easy to mount, but you may want to use some matchsticks to fill out the old hole.
The Harley Benton Security Locks are compatible with other similar strap locks, at less than half the price. If you have spent more than ¤200 on your guitar, it deserves this!