What to do with $140 000 savings

My Partner and I (both 28) currently have $145k sitting in joint savings, $20k each in personal emergency funds and save just over $8k a month after all expenses are paid (DINK combined earnings of about $250k before super or bonuses). We have 0 debt (1 car between us bought with cash and no hecs debt).

We are saving towards a house deposit but it is killing me that the total $180k is just in a savings account but I know the age old rule of not investing money you will "need" in under 5 years time.

What would you do if you were in this situation? Invest, keep saving or something else?