There are a few things you can do.

1. Increase your stability. Spread the tripod's legs to a wider stance to increase the footprint of the tripod. This way, even if the center of mass of the camera+lens combination is for forward of the ballhead's center, the center of mass is well inside of the triangle described by the tripod's feet. In general, the closer the center of mass is to the center of this triangle, the more stable your setup is.

2. Use a different quick release plate to connect your camera to the tripod. If you get a longer QR plate for the tripod's ballhead, you can use it to set the camera back behind the ballhead, putting the center of mass of the camera+lens combo over the center of the ballhead. For example, this Haoge 120mm QR plate would probably work (note that the greyed-out ballhead is not part of the plate). This plate is about $20 on Amazon. With some searching, you should probably be able to find a similar plate either elsewhere, or from another manufacturer, for less.

   
   Haoge 120mm QR plate

3. The drawback with just getting a longer baseplate as suggested above, is you’re not taking advantage of the whole reason for using QR plates in the first place: if you leave a QR plate always attached to your camera, you can quickly release it from the tripod. In order to leave the QR plate that came with the tripod always attached to your camera, you need a nodal slide clamp (sometimes also called a fore-and-aft clamp). For example, this Neewer nodal slide clamp would work, instead of getting the longer plate in #2 above.