Ionic Build to Android level 15

Hi All,

Currently I am developing an ionic project to build on android level 15, so I set target-sdk to “android-15”

The problem is, when executing a build (ionic build android), I keep getting an error saying that class ClientCertRequest not found. I know that this class introduced at android level 21. My cordova version is 5.1.1. Does this mean that cordova has a dependency to android level 21?

Thank you!