Luckily, your snow effect is not mission-critical. So even without the versioned URL, I'd probably take the trade-offs; the snow effect might disappear, but at

Luckily, your snow effect is not mission-critical. So even without the versioned URL, I'd probably take the trade-offs; the snow effect might disappear, but at least I don't give some random person arbitrary remote code execution permissions on my website. But yeah, the URL should really be versioned.