Ya mean it slips in and out too easy don't ya?
Sounds like the "prong" of the jack socket needs bending in a tad to make it tighter when the jack plug is inserted.
- trouble is I don't know whether or not the prong is accessible on your guitar.
Have a "look see" it won't hurt!!
I have a similiar issue here on my Silo - the input jack is sloppy loose, and sometimes the plug will almost fall out. I removed the 4 screws but couldn't get the jack to pull out from the body, and didn't want to chance forcing it out....
Take the pickguard off and push it out from the inside.