Max power supply voltage for EasyDriver v4.4 with Arduino UNO R3

ABSOLUTE MAXIMUM RATINGS
at TA = +25°C
Load Supply Voltage, VBB ............. 30 V

Here's what you can do, ditch the Easydrivers and get A4988-based drivers.
The A4988 can handle 36V, although I would recommend not using the max. voltage. Put a few diodes in with a 36V supply.

Or, the TI DRV8825 Driver