Squeaking is often caused by the material of the shoes rubbing together when walking.
Try this simple method to stop the noise.
Step 1. Use shoe conditioner
Give the exterior of the shoes a coat of shoe conditioner (remember to choose one that is specific to the shoe material). Gently rub the product on the shoes, paying close attention to any natural creases in the material.
Step 2. Follow up with baby powder
Lift the inner soles of the shoes and sprinkle baby powder underneath. Alternatively, you can sprinkle anywhere else that you think the material might be rubbing. Let the powder set overnight before cleaning off any excess.