If you need a stronger latch it will require a lot more work.
How to install a door slide bolt.
A typical placement is one or two feet above the knob but it can be lower.
Level up the door bolt and then mark drill and screw the top screw hole nearest the door.
Cut a piece of plywood larger than the size of the bolt.
Mark fixings for door keep.
How much strength do you need the bolt to have.
It will be necessary to drill deep enough to allow full extension of the slide bolt in order to secure the lock.
With the door bolt now fixed firmly to the door the final job is to fix the bolt keep onto the door frame.
Close the door up until the keep touches the door frame.
Then screw the bolt onto the plywood.
Glue this to the door where you want the bolt lining up the front edge of the plywood with the edge of the door.
Install and secure all 3 screws.
To install your security slide bolt lock you must first determine whether your door is inside sliding or outside sliding.
Extend the bolt out slightly and push the bolt keep over it.
The closer it is to the center of the door the more.