Scaling tilemap

[Fisher121]

I've been following this tutorial for creating a tile map in phaser3. The thing is that it works but my tiles are of 16x16 and I need to scale them to 3 times this size.

The way I tried to scale my map is by scaling each layer using layer.scale = 3 but it gives me these weird lines between tiles:

As you can see, not all of them have the lines. Any ideas how can I get rid of them?