There are a ton of iPhone cases out there to choose from, but some are definitely better than others. Now, Apple is taking another step to guarantee a higher baseline of quality with an update to its Made for iPhone (MFi) licensing program. The new rules should help protect your iPhone from drops and damage while banning dangerous and unethical materials, 9to5Mac reports citing anonymous insiders.

Moving forward, all approved iPhone cases will need to stand up to at least a one meter drop onto the ground regardless of the angle of impact. At the same time, Apple is requiring that all cases elevate the device’s screen by at least one millimeter when it’s placed face-down. That means either including a front cover or raising the edges of the case so they create a buffer around the iPhone.

Apple has also banned a number of substances for environmental or health reasons. The list include formaldehyde, PFOS, PFOA, PBDE, PBB, and phthalates, which was banned from children’s toys in the U.S. earlier this year. Finally, new iPhone cases can’t include any materials from endangered plants or animals. That last one seems like a given, but it’s still good to have it in writing.