You're right--the sentence should say "take." This is an example of the command subjunctive. In these cases, rather than varying the verb to match the subject, we always use the bare infinitive (infinitive minus "to") for the verb. A few examples:
I suggest that you arrive early.
I suggest that she arrive early.
I demand that my books be returned.
I demand that my money be refunded.
He commanded that the troops remain in place.
He commanded that the guard remain in place.
I hope this helps!