Which card for card reader DS-KD-M (13,56MHz)

[freisinger]

Hi, I bought a Hikvision Intercom 8003 with card reader. Today I would order a card or keyfob but I don‘t know witch type of Chip-technology must build-in in the card. The card reader based on Mifare technology. The mastercard, part of the card reader, has a Milfare Classic chip. But today I‚ve read that this kind of chip is unsecure.
Is there any other Mifare card compatible with the card reader?