Hlp - my bookshelf spkr is like humpty dumpty

Have you found a way to fasten a speaker to the stand so it won't all come crashing down when it gets bumped into? No, I'm not the klutz - it's my energetic cat.

I got the stand to be less wobbly by bolting 2 strips of metal, 1/8" by 1", to the bottom. My concern is keeping the speaker on top of the stand from falling off.

If it matters, I have Paradigm studio 40s and some cheap generic metal stands. Thanks for any advice you can give me.
Marie