That's not a good protection.
You should move to Password Manager which use special secured database, protected against brute forcing (like KeePass).
Not completely true, as long as the encryption is 256 bit AES and used with a key and not a password it will work, just need to make sure the key is store externally like a usb stick, it would take even a supercomputer over a million years to crack it and by then ......they can have at it!
A lot of these so called "secured databases" are just a marketing term used to get sales and money out of your pocket, nothing, I repeat NOTHING is fool proof and un-hackable , we see it every single day in the hacking and leaking of information of credit cards , apps , servers and the list goes on, check out Bleeping Computer, something gets leaked or hacked just about every day. It just depends who wants that information and how badly they want it. They can call it a "secured database" but that only means they haven't come across anyone that can hack it yet.