Unicode characters broken in Safari?

In my navigation, I have been using arrows for my 'a::before' tag. Respectively a::before {content: "\2197\fe0e";} This was working perfectly when I set up the website last fall, but for some reason it’s not gelling in Safari anymore. It still works perfectly in Chrome, as shown in screenshot – but in Safari the arrows are invisible. Has anyone had similar issues with special characters in Safari lately, and know if there is any way to resolve this?