-ms prefix not added to transform

As in my test, using autoprefixer with the following settings, it seems not to generate the transform attributes with the -ms prefix.

autoprefixer('last 2 version', 'safari 5', 'ie 9', 'opera 12.1', 'ios 6', 'android 4')

Raw code:

.tile__front {
  transform: rotateY(180deg);
}

What autoprefixer outputs

.tile__front {
  -webkit-transform: rotateY(180deg);
  transform: rotateY(180deg);
}

According to caniuse, the -ms prefix is needed for IE9.

[zapatoche]

Amazeballs!!! the latest version wasn’t installed despite running npm update, i’m now on 3.1.1 and it works like a charm. Thanks

[battaglr]

@zapatoche, have you checked that the versions of autoprefixer are the same —both in this plugin as in the CLI?