Capital gain from new house

So I hoping to switch to another house.

The issues is capital gain. My current place is my first property and it has gain a lot in capital. I only had it for three months.

Anyways to avoid capital gain? Basically going to sell my current place and buy another place. How strict is CRA on this? I heard before than if you live there for six months and sell it than buy another, you can get away with capital gain.

Any tips will be appreciated