It's funny to see how HN flipped on this subject. My company was stung by Handsontable switching to a proprietary license https://news.ycombinator.com/item?id=19488642 and the top comment back in 2019 was "Great to hear".
Your company wasn't stung by it. You chose to get stung by it. Just pin your version and live with it. If it's such a critical piece of your business, either pay a fair price for it, or make it yourself.
