I was thinking about how to say "I will let you know". The first sentence that comes to mind is
Ich werde dich wissen lassen.
Grammatically this looks fine. However, I feel a bit strange about "wissen lassen". It sounds almost as if I will do something on my side and then you'll know about it (passively). But in reality, I'll be actively letting you know (e.g. by telling you).
Is the sentence correct?