There are three certainties in life: death, taxes and guac is extra…except tomorrow. July 31st is National Avocado Day and Chipotle is celebrating with FREE guacamole.

To claim your free guac, you will have to place your order online. Here are the deets:

Purchase any regular-priced entrée on either Chipotle’s app or, for delivery or order-ahead, and the option to add guacamoleas a topping will be available for free. No promo code will be required.

The deal is not available using third party delivery services (like Postmates) so make sure you’re ordering directly from Chipotle online or via the app.

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