Why hasn’t the US one dollar bill been updated like the other currency denominations?

Question

All the other denominations over $1 have gone “Bigfaced” and been colored other than green. Why not the one-dollar bill?

In: 1216

Answer 1

IIRC, vending machine companies have lobbied to prevent the treasury from changing it. Plus counterfeiting $1 bills isn’t as big of an issue as it was for larger denominations.