Is it safe

TL;DR

Could I use nonconductive wire to shrink the gaps of my new cage so my rats can't squeeze through?

I need anyone besides purists to help me out here if ya can. I just got a new cage, spent about 2 hours setting it up and my largest rattie was able to squeeze through.

I got it through Amazon, so the hassle to break it down and pack everything back up to ship it back should be a last resort. Would I be able to safely use a non conducive wire to shrink the gaps in the cage?

Typical enclosures are all wire anyway!