The sentence is fine. Were could be used in place of are , but I don't think it's necessary.
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.
Perfect StrangerI guess it's of these questions whether time-shift should or shouldn't be used in reported speech...That's a somewhat-related issue, but the main thing is that there is absolutely no reason for all the verbs in a sentence to be in the same tense.